CN113862774B - Praseodymium lithium niobate scandium acid magneto-optical crystal and preparation method thereof - Google Patents
Praseodymium lithium niobate scandium acid magneto-optical crystal and preparation method thereof Download PDFInfo
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- 239000013078 crystal Substances 0.000 title claims abstract description 95
- POAXSRDNOWKSLD-UHFFFAOYSA-N [Li].[Pr] Chemical compound [Li].[Pr] POAXSRDNOWKSLD-UHFFFAOYSA-N 0.000 title claims description 6
- 239000002253 acid Substances 0.000 title claims description 3
- 229910052706 scandium Inorganic materials 0.000 title claims description 3
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 title claims description 3
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 16
- -1 praseodymium lithium scandium Chemical compound 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 10
- 239000000155 melt Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 230000002194 synthesizing effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- 230000005291 magnetic effect Effects 0.000 abstract description 6
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 238000005090 crystal field Methods 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 230000005669 field effect Effects 0.000 abstract description 3
- 230000007704 transition Effects 0.000 abstract description 3
- 230000006698 induction Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000001354 calcination Methods 0.000 description 4
- 239000002223 garnet Substances 0.000 description 4
- 238000003746 solid phase reaction Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910052771 Terbium Inorganic materials 0.000 description 3
- 239000010431 corundum Substances 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 229910052741 iridium Inorganic materials 0.000 description 3
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 239000005304 optical glass Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 3
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- 238000003991 Rietveld refinement Methods 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000000411 transmission spectrum Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- FNCIDSNKNZQJTJ-UHFFFAOYSA-N alumane;terbium Chemical compound [AlH3].[Tb] FNCIDSNKNZQJTJ-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000005298 paramagnetic effect Effects 0.000 description 1
- 238000000634 powder X-ray diffraction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
- C30B15/20—Controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/16—Oxides
- C30B29/22—Complex oxides
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B33/00—After-treatment of single crystals or homogeneous polycrystalline material with defined structure
- C30B33/02—Heat treatment
Abstract
The invention discloses a praseodymium lithium scandium niobate magneto-optical crystal applicable to a visible-near infrared region and a preparation method thereof. The chemical formula of the magneto-optical crystal is Li (5+2x) Pr 3 Nb (2‑x) Sc x O 12 Wherein x=0.5 to 1.0. The crystal belongs to a cubic system, and the space group is
Description
Technical Field
The invention belongs to the technical field of magneto-optical materials and crystal growth, and particularly relates to a praseodymium lithium scandium niobate magneto-optical crystal, a preparation method and application thereof.
Background
Magneto-optical materials are key functional materials indispensable in the new generation of information industry. Devices such as an optical isolator, an optical fiber current sensor, an optical circulator, a magneto-optical modulator and the like which take magneto-optical materials as cores are important basic devices in the fields of optical communication, internet of things, smart grids, mobile Internet and the like, and play a key role in information technology. The optical isolator is one of the key devices indispensable in the technical field of modern optical communication, and is called a diode in an optical path. The fiber optic current sensor is the most basic sensing device in the smart grid. Therefore, in order to meet the strategic requirements of the development of the modern information industry in China, the research of novel high-quality magneto-optical materials in the visible-near infrared band is being actively carried out.
In the magneto-optical material, magneto-optical glass is used as an amorphous magneto-optical material, has higher transmittance in the visible-near infrared band, isotropy and is easy to prepare large-size products. However, the magnetic-optical glass has a smaller Verdet constant, which is disadvantageous for miniaturization and integration of the device. Meanwhile, magneto-optical glass has poor thermal conductivity and small threshold value of laser damage resistance, and is not suitable for being applied to a high-power laser system. Currently, crystalline magneto-optical materials commercially available in the visible-near infrared band are mainly Terbium Gallium Garnet (TGG) crystals. However, the growth process of the crystal is not easy to control, the growth of high-quality large-size TGG crystals is difficult in China, and compared with foreign TGG products, the difference in two indexes of absorption loss and extinction ratio is still remained. In addition, TGG crystals are expensive to synthesize and costly to grow. Terbium Aluminum Garnet (TAG) crystals are paramagnetic magneto-optical crystals with excellent comprehensive properties in the visible-near infrared band, have a Verdet constant about 1.5 times of TGG, are non-homogeneous molten compounds, cannot be grown by a Czochralski method, are expensive in growth cost, and are difficult to grow large-size bulk single crystals. Therefore, searching for a novel magneto-optical crystal material with a cubic structure and a stronger magneto-optical effect and capable of being grown by adopting a Czochralski method is an urgent need for information technology development.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a praseodymium lithium scandium niobate magneto-optical crystal applicable to a visible-near infrared light region and a preparation method thereof. The prepared magneto-optical crystal has high cube symmetry, and can effectively eliminate the limit of the birefringence effect on magneto-optical application. Meanwhile, the magneto-optical material has the structural characteristics of high magnetic rare earth ion content, large electron exchange effect, strong crystal field effect, large effective electron transition wavelength of the magnetic rare earth ions in the crystal and the like, is favorable for generating a strong magneto-optical effect, and is expected to provide a novel high-quality magneto-optical material for developing a new magneto-optical device in a visible-near infrared region.
In order to achieve the above purpose, the invention adopts the following technical scheme:
praseodymium lithium niobate magneto-optical crystal with chemical formula of Li (5+2x) Pr 3 Nb (2-x) Sc x O 12 Wherein x=0.5-1.0, belongs to a cubic system, and the space group is。
The cubic system praseodymium lithium scandium niobate magneto-optical crystal is subjected to single crystal growth by adopting a melt pulling (Czochralski) method, and the preparation method is as follows:
1) Synthesizing high-purity initial raw materials. According to Li synthesis (5+2x) Pr 3 Nb (2-x) Sc x O 12 (x=0.5-1.0) the stoichiometric ratio accurately weighs the medicine (Pr 6 O 11 Purity 99.99%, li 2 CO 3 Purity 99.95%, nb 2 O 5 Purity 99.95%, sc 2 O 3 Purity 99.95%), and the weighed medicines are put into a corundum mortar for grinding uniformly, tabletting and then high-temperature sintering, thus obtaining the initial raw materials required by crystal growth.
2) And (5) growing single crystals. The iridium crucible is used as a crystal growth container, the synthesized initial raw material is filled into the container, and placed into a single crystal pulling furnace to make it in inert gas (such as N 2 Ar, etc.), the growth temperature is 1300-1550 ℃, the growth speed is 0.5-2.0 mm/h, and the crystal rotation speed is 10-20 r/min. Observing the crystal growth time through a quartz observation window on the single crystal pulling furnaceThe ring and the change condition of the growth trend, and the lifting of the electric potential and the change rate thereof are regulated by the European table so as to control the crystal growth form.
3) And (5) annealing the crystal. After the crystal growth is finished, the crystal is lifted and separated from the melt, the height of the crystal is adjusted to be 2-5 mm higher than the surface of the melt, and then the crystal is slowly annealed to room temperature, wherein the cooling rate is 10-100 ℃/h. Thus obtaining cubic Li (5+2x) Pr 3 Nb (2-x) Sc x O 12 Magneto-optical crystal blank.
The invention has the remarkable advantages that: the invention can obtain cubic praseodymium lithium scandium niobate magneto-optical crystal with excellent physical and chemical properties. The magneto-optical crystal has better light transmission performance in the visible-near infrared region, has the characteristic of isotropy of a cubic crystal system, and can effectively eliminate the limit of the birefringence effect on magneto-optical application. Meanwhile, the crystal has the structural characteristics of high magnetic rare earth ion content, large electron exchange effect, strong crystal field effect, large effective electron transition wavelength of the magnetic rare earth ions in the crystal and the like, and is favorable for generating a strong magneto-optical effect. Through Faraday magneto-optical effect test system test, the magneto-optical crystal Li of the invention (5+2x) Pr 3 Nb (2-x) Sc x O 12 The Verdet constant (Verdet constant) is 115-125 rad/T.m (633 nm), which is far higher than the terbium doped glass commercially used at present and is equivalent to the Terbium Gallium Garnet (TGG) crystal commercially used. In addition, the magneto-optical crystal is a consistent molten compound, the growth temperature is 1300-1550 ℃, the medium frequency induction pulling method can be adopted for growth, the growth process is simple, the period is short, the crystal integrity is high, and the mass production with large scale and low cost can be realized.
Drawings
FIG. 1 is a magneto-optical crystal Li of the present invention 6 Pr 3 Nb 1.5 Sc 0.5 O 12 Rietveld refinement of (c).
FIG. 2 is a magneto-optical crystal Li of the present invention 6 Pr 3 Nb 1.5 Sc 0.5 O 12 Is a transmission spectrum of the light source.
Fig. 3 is a schematic diagram of a faraday magneto-optical effect test system for detection according to the present invention: 1-a laser; 2-polarizer; 3-an electromagnet; 4-sample; 5-an analyzer; 6-rotating the lens holder at an angle; 7-optical power meter.
FIG. 4 is a magneto-optical crystal Li of the present invention 6 Pr 3 Nb 1.5 Sc 0.5 O 12 Is a faraday rotation of (c).
Detailed Description
Example 1: growth of cubic system Li by melt pulling method 6 Pr 3 Nb 1.5 Sc 0.5 O 12 Magneto-optical crystals.
Will be according to Li 6 Pr 3 Nb 1.5 Sc 0.5 O 12 Pr with accurately weighed stoichiometric ratio 6 O 11 （99.99%）、Li 2 CO 3 （99.95%）、Nb 2 O 5 （99.95%）、Sc 2 O 3 (99.95%) is put into a corundum mortar for uniform mixing and grinding, pressed into tablets, put into a muffle furnace for calcining for 2 hours at 200 ℃, then heated to 730 ℃ for calcining for 5 hours, and finally heated to 1000 ℃ for solid phase reaction for 12 hours. Cooling, taking out, grinding, tabletting, heating to 1050 ℃, and carrying out solid phase reaction again for 12 hours to obtain the initial raw material for crystal growth. With dimensions phi 60 x 43mm 3 The iridium crucible is used as a crystal growth container, the synthesized polycrystalline powder raw material is filled into the container, and is put into a single crystal pulling furnace to carry out single crystal pulling under Ar atmosphere. The growth temperature is 1430 ℃, the growth speed is 1.0mm/h, and the crystal rotating speed is 12r/min. In the growth process, the change conditions of the aperture and the growth trend during the crystal growth are observed through a quartz observation window, and the lifting and the change rate of the electric potential are regulated through an European table so as to control the crystal growth form. After the growth is finished, the crystal is lifted and separated from the melt, and the height of the crystal is adjusted to be 2-3 mm higher than the surface of the melt. Then setting a cooling program, slowly annealing to room temperature at a cooling rate of 10-100 ℃/h for 32 hours to obtain Li with a size of 12mm multiplied by 12mm (equal diameter part) 6 Pr 3 Nb 1.5 Sc 0.5 O 12 And (5) a crystal.
Li prepared in example 1 was recorded by an X-pert powder diffractometer 6 Pr 3 Nb 1.5 Sc 0.5 O 12 The crystal powder X-ray diffraction spectrum was refined using the Rietveld method for crystal structure using the computer program DBWS-9411. The result of the function fit is compared with the experimental result of the crystal as shown in fig. 1. The result shows that the curve calculated by the function is well matched with the experimental result, the final finishing factor reaches Rwp=5.23%, and the grown crystal is in a cubic garnet structure, and the space group isNo other impurity substances exist. Li is mixed with 6 Pr 3 Nb 1.5 Sc 0.5 O 12 After the crystals were oriented, cut and polished, transmission spectra at room temperature of 200 to 1400nm were measured on a Perkin-Elmer Lambda UV/Vis/NIR spectrometer, as shown in FIG. 2. The results show that the ultraviolet absorption cut-off edge is about 300 nm, and the ultraviolet absorption cut-off edge is in the wave band range of 300-1400 nm, except Pr 3+ Besides the characteristic absorption peak of the ions, no other absorption exists, and the total transmittance is high. The magneto-optical crystal Li of the present invention was tested in a home-made Faraday magneto-optical effect test system (FIG. 3) using an extinction method 6 Pr 3 Nb 1.5 Sc 0.5 O 12 As shown in fig. 4. The result shows that its Verdet constant is about 183 rad/T.m (633 nm), comparable to commercial TGG crystals.
Example 2: growth of cubic system Li by melt pulling method 7 Pr 3 NbScO 12 Magneto-optical crystals.
Will be according to Li 7 Pr 3 NbScO 12 Pr with accurately weighed stoichiometric ratio 6 O 11 （99.99%）、Li 2 CO 3 （99.95%）、Nb 2 O 5 （99.95%）、Sc 2 O 3 (99.95%) is put into a corundum mortar for uniform mixing and grinding, pressed into tablets, put into a muffle furnace for calcination at 200 ℃ for 2 hours, heated to 730 ℃ for calcination for 5 hours, and finally heated to 950 ℃ for solid phase reaction for 12 hours. Cooling, taking out, grinding, tabletting, heating to 1000deg.C, and performing solid phase reaction for 12 hrInitial raw material for crystal growth. With dimensions phi 60 x 43mm 3 The iridium crucible is taken as a crystal growth container, the synthesized polycrystalline powder raw material is filled into the container, and is put into a single crystal pulling furnace to be N 2 Single crystal pulling is performed under an atmosphere. The growth temperature is 1380 ℃, the growth speed is 1.5mm/h, and the crystal rotating speed is 20r/min. In the growth process, the change conditions of the aperture and the growth trend during the crystal growth are observed through a quartz observation window, and the lifting and the change rate of the electric potential are regulated through an European table so as to control the crystal growth form. After the growth is finished, the crystal is lifted and separated from the melt, and the height of the crystal is adjusted to be 2-3 mm higher than the surface of the melt. Then setting a cooling program, slowly annealing to room temperature at a cooling rate of 10-80 ℃/h for 36 hours to obtain Li with a size of 11mm multiplied by 11mm (equal diameter part) 7 Pr 3 NbScO 12 The crystal, which has a Verdet constant (Verdet constant) of about 181 rad/T.m in the 633nm band, is comparable to a commercial TGG crystal.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (3)
1. A praseodymium lithium niobate scandium acid magneto-optical crystal, characterized in that: the chemical formula of the crystal is Li (5+2x) Pr 3 Nb (2-x) Sc x O 12 Wherein x=0.5-1.0, belongs to a cubic system, and the space group is。
2. A method of making a praseodymium lithium scandium niobate magneto-optical crystal according to claim 1, characterized in that: the method comprises the following steps:
(1) Synthesizing a high-purity polycrystalline raw material: according to Li (5+2x) Pr 3 Nb (2-x) Sc x O 12 Wherein x=0.5-1.0 stoichiometric ratio accurately weighs Pr 6 O 11 、Li 2 CO 3 、Nb 2 O 5 And Sc (Sc) 2 O 3 Grinding them uniformly, tabletting, and then sintering at high temperature to obtain the initial raw material required by crystal growth;
(2) Single crystal growth: single crystal pulling is carried out on the initial raw materials in the atmosphere of inert gas, the growth temperature is 1300-1550 ℃, the growth speed is 0.5-2.0 mm/h, and the crystal rotating speed is 10-20 r/min;
(3) And (3) annealing the crystal: after the crystal growth is finished, lifting the crystal to be 2-5 mm higher than the surface of the melt, slowly annealing to room temperature, and cooling at a rate of 10-100 ℃/h to obtain cubic Li (5+2x) Pr 3 Nb (2-x) Sc x O 12 Magneto-optical crystal blank.
3. Use of the praseodymium lithium niobate magneto-optical crystal according to claim 1 or the praseodymium lithium niobate magneto-optical crystal prepared by the method according to claim 2 in a visible-near infrared region magneto-optical material.
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|---|---|---|---|---|
| CN105624790A (en) * | 2016-03-01 | 2016-06-01 | 南开大学 | Bismuth-magnesium double-doped lithium niobate crystal |
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| JPH0789798A (en) * | 1993-09-24 | 1995-04-04 | Natl Inst For Res In Inorg Mater | Scandium added lithium niobate single crystal for optical element |
| CN101956236A (en) * | 2010-10-21 | 2011-01-26 | 哈尔滨工程大学 | Big-size doped lithium niobate crystal and preparation method thereof |
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| Title |
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