CN110445490B - Logic device based on spin wave driven magnetic Sjog seed - Google Patents
Logic device based on spin wave driven magnetic Sjog seed Download PDFInfo
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- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
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Abstract
The invention relates to a logic device based on spin wave driving magnetic Sjog seed, which is an AND gate, comprising: a spin wave excitation source for generating spin waves, comprising two excitation sources at a first and a second input terminal; the magnetic nano track consists of a magnetic material layer and a strong spin track material layer, and comprises five tracks, wherein one end of a first track is respectively connected with one end of a second track and one end of a third track, and the other end of the first track is respectively connected with one end of a fourth track and one end of a fifth track; one end of the second track and one end of the third track are respectively connected with the first track, and the other end of the second track and the other end of the third track are respectively a first output end and a first input end; one end of the fourth track and one end of the fifth track are respectively connected with the other end of the first track and are respectively a second input end and a second output end. The logic device is realized by driving the magnetic Sjog seed by spin waves, and has the characteristics of low temperature, high stability and long service life.
Description
Technical Field
The invention relates to the technical field of logic devices, in particular to a logic device based on spin wave driving magnetic Sjog seed.
Background
Compared with a microelectronic logic device, the magnetic Sjog sub-device has the advantages of small size, high stability, high speed and the like. The current main means for driving the magnetic Sjog seed is current driving, a large amount of Joule heat can be generated in equipment devices, and the stability of the magnetic Sjog seed and the service life of the devices are affected.
Disclosure of Invention
Based on this, it is necessary to provide a logic device based on spin-wave driven magnetic spinners.
A logic device based on spin wave driven magnetic spinelle, said logic device being an and gate comprising:
the spin wave excitation source is used for generating spin waves and comprises a first excitation source which is arranged at a first input end; the second excitation source is arranged at the second input end;
the magnetic nanometer track consists of a magnetic material layer and a strong spin track material layer which are connected with each other in a contact way, and comprises a first track, a second track, a third track, a fourth track and a fifth track, wherein,
one end of the first rail is connected with one end of the second rail and one end of the third rail respectively, and the other end of the first rail is connected with one end of the fourth rail and one end of the fifth rail respectively;
one end of the second rail is connected with the first rail, and the other end of the second rail is a first output end;
one end of the third rail is connected with the first rail, and the other end of the third rail is a first input end;
one end of the fourth track is connected with the first track, and the other end of the fourth track is a second input end;
and one end of the fifth track is connected with the first track, and the other end of the fifth track is a second output end.
In one embodiment, the magnetic material layer is a ferromagnetic material and the strong spin-orbit material layer is a heavy metal material.
In one embodiment, the spin wave excitation source is a square magnetic field pulse applied by a microwave antenna.
In one embodiment, the spin wave excitation source is an oersted field generated by an alternating current.
In one embodiment, the range of angles between the first track and the second track, between the first track and the third track, between the first track and the fourth track, between the first track and the fifth track is [90 °,120 ° ].
In one embodiment, the internal angle of the 90 ° angle between the rails is double 45 °.
In one embodiment, the spin wave excitation source may be further disposed on a path of the magnetic nano-track to continuously drive the magnetic spinodal movement.
Meanwhile, the present disclosure also provides a logic device based on spin wave driving magnetic sping, the logic device is an or gate, including:
the spin wave excitation source is used for generating spin waves and comprises a first excitation source which is arranged at a first input end; the second excitation source is arranged at the second input end;
the magnetic nanometer track consists of a magnetic material layer and a strong spin track material layer which are connected with each other in a contact way, and comprises a first track, a second track and a third track, wherein,
one end of the first rail is connected with one end of the second rail and one end of the third rail respectively, and the other end of the first rail is an output end;
one end of the second rail is connected with the first rail, and the other end of the second rail is a first input end;
and one end of the third rail is connected with the first rail, and the other end of the third rail is a second input end.
The AND gate and the OR gate based on the spin wave driving magnetic sping seeds realize the logic function of the AND gate and the OR gate by driving the magnetic sping seeds to move through the spin wave, and simultaneously have the characteristics of low temperature, high stability and long service life.
Drawings
FIG. 1 is a waveform diagram of square magnetic field pulses as spin wave excitation sources;
FIG. 2 is a diagram showing the movement of magnetic Szechwan cassia seed when the spin wave excitation source is square magnetic field pulse;
FIG. 3 is a graph of the change in the speed of movement of a spin-wave driven magnetic semen Sojae under different length orbits;
FIG. 4a is a diagram of the motion of spin-wave driven magnetic Siegesbeck seed on an L-shaped magnetic nano-track with a right angle of rotation;
FIG. 4b is a diagram of the motion of spin-wave driven magnetic Siegesbeck seed on an L-shaped magnetic nanotrack with a double 45 degree angle;
FIG. 4c is a diagram of the motion of spin-wave driven magnetic semen Sojae on inverted L magnetic nanotracks with a rotation angle of double 45 degrees;
FIG. 5a is a diagram of the motion of a spin-wave driven magnetic Sjog seed from the bottom of a T-shaped magnetic nano-track;
FIG. 5b is a diagram of the motion of a spin-wave driven magnetic Sjog seed initiated by the left arm of a T-shaped magnetic nanotrack;
FIG. 5c is a diagram of the motion of a spin-wave driven magnetic Sjog seed initiated by the right arm of a T-shaped magnetic nanotrack;
FIG. 5d is a diagram of the motion of spin-wave driven magnetic Siegesbeck seed on a Y-type magnetic nanotrack;
FIG. 6 is a schematic diagram of a structure of an AND gate based on spin-wave driven magnetic Sjog's seed;
FIG. 7 is a diagram of the motion of a magnetic Stokes semen when the spin wave excitation source is the Oersted field generated by an alternating current;
fig. 8 is a schematic diagram of a structure of a magnetic or gate based on spin-wave driving of a magnetic spinelle.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Preferred embodiments of the present application are shown in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Spin waves are non-uniform precessions of magnetic moments in a magnetic material, so spin waves can use interactions between magnetic moments to drive magnetic structures, such as domain walls, magnetic vortices, and also include magnetic spinners, present within a magnetic material. Magnetic spines are a chiral spin structure with a vortex structure. The magnetic spinosyns can be stably present in bulk magnets with strong spin-orbit coupling or in nanofilms coupled with heavy metals. The dynamics of the magnetic moment can be described by the langerhans-Li Fuxi z-gilbert equation,
where t is time, m=m/M S Is a reduced magnetic moment, M S Is the saturation moment of the magnetic material. Gamma ray 0 Is the magnetic rotation ratio. Alpha is the damping coefficient.
The effective field in the system is represented, where E represents the total energy density in the system. Total energy contains, exchange energy, magnetocrystalline anisotropy energy, demagnetizing energy, and Dzyaloshinskii-Moriya (DM) action energy.
The logic devices based on spin wave driving magnetic spines, which are related by the disclosure, all comprise magnetic nano orbits, wherein the magnetic nano orbits are composed of magnetic material layers and strong spin orbit material layers which are in contact with each other, the magnetic material layers are made of magnetic materials for generating magnetic spines and providing the magnetic spines for movement, in one embodiment, the magnetic material layers are nano films made of ferromagnetic materials, and it is understood that in other embodiments, the magnetic layers can also be composed of magnetic materials such as Fe, co, ni elements and alloys thereof. The layer of strong spin orbit material is used to create the DM interactions (dzyaloshinsky-Moriya interactions) necessary to maintain and create magnetic spines, which in one embodiment is composed of a heavy metal material.
The present disclosure simulates the situation that magnetic spinelle moves along magnetic nano orbit under spin wave driving by a simulation numerical simulation method, and the magnetic parameters used are as follows: saturation magnetization M S Exchange constant a=15 pJ/m, magnetocrystalline anisotropy constant k=0.8 MJ/m =580 kA/m 3 DM interaction constant d=4 mJ/m 2 Track dimensions 800nm x 400nm x 1nm. Spin waves are excited with an applied magnetic field having a strength of 600mT and a frequency of 25GHz.
Referring to fig. 1 and 2, spin waves propagating in the +x direction are excited in a specific region of the magnetic nano-track to drive the magnetic sping seeds to move by applying square magnetic field pulses as shown in fig. 1. Fig. 2 is a diagram showing the movement of magnetic spines when the spin wave excitation source is a square magnetic field pulse, wherein the hatched portion indicates the spin wave excitation source, and the circle indicates the magnetic spines, and it can be seen that the magnetic spines are driven by the spin wave to move in the +x direction, move to a position 266nm from the right end of the initial position after 5ns, and move to a position 457nm from the initial position after 9 ns. It can be seen that the magnetic stigman seeds move in the right direction with the passage of time, and the moving speed is changed. Referring to fig. 3, a graph of the movement speed of the magnetic spinodal core under spin wave drive at different length orbits shows that the magnetic spinodal core has a significantly reduced speed when it is far from the spin wave source due to the decay of the spin wave.
It will be appreciated that the distance that a magnetic spindlem can move under the drive of a single spin wave is limited due to the decay of the spin wave and can be derived from data relating to the magnetic spindlem and spin wave. Thus, in one embodiment, the motion profile and position of the magnetic spinodal are controlled by controlling the intensity and orbit length of the spin wave excitation source.
In order to meet the requirement of long-distance transmission of the magnetic spinosyn on the magnetic nano-track, a plurality of spin wave excitation sources can be arranged at different positions on the magnetic nano-track and used for continuously driving the magnetic spinosyn, so that speed attenuation is avoided. In one embodiment, the plurality of spin wave excitation sources are equally spaced on the magnetic nano-track to continuously drive the magnetic sping seed motion.
Referring to fig. 4a, 4b and 4c, the movement of the magnetic spinodal semen on the L-shaped nano-orbit is shown, wherein each graph represents the position of the magnetic spinodal semen at different time points after the magnetic spinodal semen is driven to start moving, wherein the arrow indicates the moving direction, the shaded portion indicates the spin wave excitation source, and the white circle indicates the magnetic spinodal semen, and as can be seen in fig. 4a, the magnetic spinodal semen is easily damaged by colliding with the right angle when the rotation angle is the right angle. Under the same spin wave intensity driving, when the rotation angle is changed from 90 DEG right angle to double 45 DEG rotation angle, the magnetic Sjog's semen smoothly passes through. In addition, the results of fig. 4b and 4c show that the magnetic spines can always move along the tracks for L-shaped tracks of different directions.
Referring to fig. 5a to 5b to 5c and 5d, the movement of the magnetic sping-wave driven sping-semen on the T-shaped and Y-shaped nano-orbits is shown, wherein each graph represents the position of the magnetic sping-semen at different time points after the magnetic sping-semen is driven to start moving, wherein the arrow indicates the moving direction, the shaded part indicates the spin-wave excitation source, the white circle indicates the magnetic sping-semen, and the tendency of the movement of the magnetic sping-semen is that the movement is larger to the left than the straight and larger to the right when the magnetic nano-orbits with multiple directions are faced by comparing fig. 5a, 5b and 5 c. Referring to fig. 5d, the magnetic spines may still move along the track for angles other than right angles, such as 120 °.
FIG. 6 is a schematic diagram of an AND gate based on spin-wave driven magnetic Siemens in an embodiment.
One end of the first rail 110 is connected to one end of the second rail 120 and one end of the third rail 130, respectively. One end of the second rail 120, which is not connected to the first rail 110, serves as a first output end 121; the end of the third track 130, which is not connected to the first track 110, serves as a first input end 131, and at the same time, a spin wave excitation source 132 is provided at the end of the first input end 131, and the magnetic spinelle seeds can enter from the first input end 131 and be driven by spin waves emitted from the spin wave excitation source 132 to move in the magnetic nano track. The spin wave excitation source 132 is a square magnetic field pulse with the external magnetic field intensity of 600mT and the frequency of 25GHz as shown in fig. 1.
The other end of the first rail 110 is connected to one end of the fourth rail 140 and one end of the fifth rail 150, respectively. One end of the fifth rail 150, which is not connected to the first rail 110, serves as a second output end 151; the end of the fourth track 140, which is not connected to the first track 110, serves as a second input end 141, and at the same time, a spin wave excitation source 142 is provided at the end of the second input end 141, and the magnetic spinelle seeds can enter from the second input end 141 and be driven by spin waves emitted from the spin wave excitation source 142 to move in the magnetic nano track. The spin wave excitation source 142 is a square magnetic field pulse with the external magnetic field intensity of 600mT and the frequency of 25GHz as shown in fig. 1.
As shown in fig. 6, in this embodiment, the included angles between the first track 110 and the second track 120, the third track 130, the fourth track 140, and the fifth track 150 are all 90 °, and the whole magnetic nano track is in an "i" shape, and in one embodiment, all the included angles can take values in the range of [90 °,120 ° ].
The working principle of the magnetic-stoneley-seed-based AND gate is as follows:
assuming that there is a magnetic Stokes plot at the first input 131, this is denoted as a logic "1", and if not, it is denoted as a logic "0"; a magnetic sigma-delta seed at the second input 141, which is denoted as logic "1", and if not, as logic "0"; the second output 151 is represented as a logical "1" if there is a magnetic sigma pattern, and as a logical "0" if there is no magnetic sigma pattern. The logic operation of an and gate based on spin wave driven magnetic spinelle has the following cases:
1+0=0, the first input end 131 has a magnetic stoneley seed, and the second input end 141 has no magnetic stoneley seed, so that the magnetic stoneley seed starts to move under the drive of the spin wave emitted by the spin wave excitation source 132, gradually stops moving due to the attenuation of the spin wave, cannot reach the second output end 151, and finally, there is no magnetic stoneley seed at the second output end 151, namely 1+0=0;
0+1=0, the first input end 131 has no magnetic stoneley seed, the second input end 141 has a magnetic stoneley seed, the magnetic stoneley seed starts to move under the driving of the spin wave emitted by the spin wave excitation source 142, and the magnetic stoneley seed turns left to enter the first track 110 due to the movement trend that the magnetic stoneley seed is greater than straight movement and greater than right movement on the magnetic nano track under the driving of the spin wave, and finally the magnetic stoneley seed is not obtained at the second output end 151, namely 0+1=0;
1+1=1, the first input end 131 has a magnetic space seed, which is not called magnetic space seed a, the second input end 141 also has a magnetic space seed, which is not called magnetic space seed B, the two space seeds start to move under the drive of spin waves emitted by the spin wave excitation sources 132 and 142, simultaneously, because the magnetic space seed driven by the spin waves moves leftwards and rightwards more than the straight movement trend on the magnetic nano track, the magnetic space seed a moves to the opposite left side of the movement direction of the magnetic space seed a to enter the first track when moving to the fork of the second track and the first track, and the magnetic space seed B moves to the fork of the third track and the first track, the magnetic semen cassiae move to the opposite left side of the moving direction of the magnetic semen cassiae and enter a first track, at the moment, two magnetic semen cassiae move in opposite directions in the first track and collide, after collision, the two magnetic semen cassiae respectively keep the original kinetic energy to move in the direction opposite to the original moving direction of the magnetic semen cassiae, the magnetic semen cassiae A moves to the connecting end direction of the first track, the second track and the third track, the magnetic semen cassiae B moves to the connecting end direction of the first track, the fourth track and the fifth track and moves to the left side again in the opposite moving direction, the magnetic semen cassiae B enters a fifth track and finally reaches a second output end 151, and finally one magnetic semen cassiae is obtained at the second output end 151, namely 1+1=1;
0+0=0, and neither the first input terminal 131 nor the second input terminal 141 has magnetic sterculia seeds, so that the whole and gate has no magnetic sterculia seeds, and finally no magnetic sterculia seeds are obtained at the second output terminal 151, i.e. 0+0=0.
In one embodiment, the spin wave excitation source may also be an oersted field generated by an alternating current, see fig. 7, which is a diagram of the motion of a magnetic stigmine when the spin wave excitation source is an oersted field generated by an alternating current, in this embodiment, the oersted field is generated by an alternating current of 6.87ma,50 ghz. It can be seen that the oersted field generated by the alternating current can also excite the spin wave to drive the magnetic spinelle to move.
FIG. 8 is a schematic diagram of a structure of an OR gate based on spin-wave driven magnetic Siemens in an embodiment.
One end of the first rail 210 is connected to one end of the second rail 220 and one end of the third rail 230, respectively, and the other end is an output end. The end of the second track 220, which is not connected to the first track 210, is a first input end 221, and at the same time, a spin wave excitation source 222 is disposed at the end of the first input end 221, and the magnetic spinelle seeds can enter from the first input end 221 and be driven by spin waves emitted by the spin wave excitation source 222 to move in the magnetic nano track. The spin wave excitation source 222 is a square magnetic field pulse with the external magnetic field intensity of 600mT and the frequency of 25GHz as shown in fig. 1. The end of the third track 230, which is not connected to the first track 210, is a second input end 231, and at the same time, a spin wave excitation source 232 is disposed at the end of the second input end 231, and the magnetic spinelle seeds can enter from the second input end 231 and be driven by spin waves emitted by the spin wave excitation source 232 to move in the magnetic nano track. The spin wave excitation source 232 is a square magnetic field pulse with the external magnetic field intensity of 600mT and the frequency of 25GHz as shown in fig. 1.
As shown in fig. 8, in this embodiment, the included angle between the first track 210 and the second track 220 and the included angle between the second track 220 and the third track 230 are both 90 °, and the whole magnetic nano track is in a T shape, and in one embodiment, can take a value in the range of [90 °,120 ° ].
The working principle of the magnetic-stoneley-seed-based AND gate is as follows:
assuming a magnetic Stokes plot at the first input 221, this is denoted as a logic "1", and if not, a logic "0"; a magnetic sigma-delta seed at the second input 231, which is denoted as logic "1", and if not, as logic "0"; the output 211 is represented as a logical "1" if there is a magnetic steven seed, and as a logical "0" if there is no magnetic steven seed. The logic operation of the or gate based on the spin wave driven magnetic spinelle has the following cases:
1+0=1, the first input end 221 has a magnetic stoneley seed, while the second input end 231 has no magnetic stoneley seed, so that the magnetic stoneley seed starts to move under the drive of spin waves emitted by the spin wave excitation source 222, and the magnetic stoneley seed moves to the opposite left side of the movement direction when moving to the fork of the second track and the first track due to the movement trend that the magnetic stoneley seed is greater than straight movement and greater than right on the magnetic nanometer track under the drive of the spin waves, namely 1+0=1 is finally obtained at the output end 211;
0+1=1, the first input end 221 has no magnetic spinodal semen, the second input end 231 has a magnetic spinodal semen, the magnetic spinodal semen starts to move under the driving of spin waves emitted by the spin wave excitation source 232, the magnetic spinodal semen moves leftwards and rightwards on the magnetic nano-track more than straight movement trend under the driving of spin waves, when moving to the fork of the second track and the third track, the magnetic spinodal semen moves to the opposite left side of the movement direction of the magnetic spinodal semen, enters the second track, then gradually decelerates and stops under the driving of spin waves generated by the spin wave excitation source 222 of the second track, and moves to the connecting position of the second track 220 and the first track 210 under the driving of the spin waves, and moves leftwards again due to the movement trend, and finally the magnetic spinodal semen is obtained at the output end 211, namely 0+1=1;
1+1=1, the first input end 221 has a magnetic sterculia seed, the second input end 231 also has a magnetic sterculia seed, and then the two magnetic sterculia seeds start to move under the excitation of the spin wave excitation source 222 and the spin wave excitation source 232 respectively, the respective movement conditions are shown in the two conditions, and finally the magnetic sterculia seed is obtained at the output end 211, namely 1+1=1;
0+0=0, and neither the first input 221 nor the second input 231 has magnetic cassia seed, so that the whole or gate has no magnetic cassia seed, and finally no magnetic cassia seed is obtained at the output 211, i.e. 0+0=0.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A logic device based on spin wave driving magnetic Stokes son is characterized in that the logic device is an AND gate, comprising:
the spin wave excitation source is used for generating spin waves and comprises a first excitation source which is arranged at a first input end; the second excitation source is arranged at the second input end;
the magnetic nanometer track consists of a magnetic material layer and a strong spin track material layer which are connected with each other in a contact way, and comprises a first track, a second track, a third track, a fourth track and a fifth track, wherein,
one end of the first track is connected with one end of the second track and one end of the third track respectively, and the other end of the first track is connected with one end of the fourth track and one end of the fifth track respectively; the first track is positioned on the left side of the second track in the direction of the first track, and the fourth track is positioned on the left side of the fourth track in the direction of the fifth track;
the other end of the second track is a first output end;
the other end of the third track is a first input end;
the other end of the fourth track is the second input end;
the other end of the fifth track is a second output end.
2. The spin-wave driven magnetic spinosyn based logic device of claim 1, wherein the layer of magnetic material is a ferromagnetic material.
3. The spin-wave driven magnetic spinosyn-based logic device of claim 1, wherein the layer of strong spin-orbit material is a heavy metal material.
4. The spin-wave driven magnetic spinelle based logic device of claim 1 wherein the spin-wave excitation source is a square magnetic field pulse applied by a microwave antenna.
5. The spin-wave driven magnetic stevensite-based logic device of claim 1, wherein the spin-wave excitation source is an oersted field generated by an alternating current.
6. The spin-wave driven magnetic spinseed based logic device of claim 1, wherein the included angle between the first track and the second track, between the first track and the third track, between the first track and the fourth track, between the first track and the fifth track ranges from [90 °,120 ° ].
7. The spin-wave driven magnetic spinosyn-based logic device of claim 6, wherein each of said included angles is a 90 ° turn, said 90 ° turn comprising two 45 ° turns and a transition segment connecting the two 45 ° turns.
8. The spin-wave driven magnetic spinodal logic device of claim 1, wherein the number of spin-wave excitation sources is a plurality and equally spaced on the magnetic nano-tracks to continuously drive magnetic spinodal motion.
9. A logic device based on spin wave driven magnetic spinelle, characterized in that the logic device is an or gate comprising:
the spin wave excitation source is used for generating spin waves and comprises a first excitation source which is arranged at a first input end; the spin wave excitation source also comprises a second excitation source which is arranged at a second input end;
the magnetic nano-track consists of a magnetic material layer and a strong spin track material layer which are connected in a contact way, and comprises a first track, a second track and a third track, wherein,
one end of the first track is connected with one end of the second track and one end of the third track respectively, and the other end of the first track is an output end;
one end of the second track is connected with the first track, and the other end of the second track is a first input end;
the other end of the third track is a second input end; the first, second and third tracks have a configuration for the entry and passage of magnetic stigmata.
10. The spin-wave driven magnetic spinseed based logic device of claim 9, wherein an included angle between the first track and the second track, between the first track and the third track ranges from [90 °,120 ° ].
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| CN108521275A (en) * | 2018-04-03 | 2018-09-11 | 电子科技大学 | A kind of logic gate based on magnetic Skyrmion |
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