ES371265A1 - Domain propagation arrangement - Google Patents

Domain propagation arrangement

Info

Publication number
ES371265A1
ES371265A1 ES371265A ES371265A ES371265A1 ES 371265 A1 ES371265 A1 ES 371265A1 ES 371265 A ES371265 A ES 371265A ES 371265 A ES371265 A ES 371265A ES 371265 A1 ES371265 A1 ES 371265A1
Authority
ES
Spain
Prior art keywords
domain
channel
rotating
propagation
overlays
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES371265A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of ES371265A1 publication Critical patent/ES371265A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/02—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
    • G11C19/08—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure
    • G11C19/0808—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure using magnetic domain propagation
    • G11C19/0816—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure using magnetic domain propagation using a rotating or alternating coplanar magnetic field
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/02—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
    • G11C19/08—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure
    • G11C19/0858—Generating, replicating or annihilating magnetic domains (also comprising different types of magnetic domains, e.g. "Hard Bubbles")
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M12/00—Hybrid cells; Manufacture thereof
    • H01M12/04—Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/80—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using non-linear magnetic devices; using non-linear dielectric devices
    • H03K17/84—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using non-linear magnetic devices; using non-linear dielectric devices the devices being thin-film devices

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Magnetic Heads (AREA)
  • Mram Or Spin Memory Techniques (AREA)
  • Hall/Mr Elements (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

In a magnetic device comprising a layer of magnetic material having associated therewith an overlay of magnetic material to define a single wall domain producing region and a domain propagation channel the arrangement is such that when an appropriate magnetic field rotating in the plane of the layer is applied a single wall domain is produced at the input of the channel and propagated therealong. In the arrangement of Fig. 1 the single wall domain producing region and propagation channel of sheet 11 are defined by a disc 15 and bar and T-shaped overlays 13, 14 of permalloy. When a rotating magnetic field H produced by orthogonal sets of coils B, B1 is applied a permanent domain D provided in the layer 11 moves about the periphery of the disc as shown in Figs. 2-8, positive poles induced in the overlay by the magnetic field attracting the domain. The domain is stretched until as shown at Fig. 7 it is about to divide into two, then Fig. 8 the domain divides one following the bar and T and the other D1 moving about the disc again. The rotating field also results in propagation of the domains along the channel to the output position coupled by conductors 19, 21, a pulse on conductor 19 resulting in a domain coupled thereto collapsing the domain and inducing a signal in conductor 21, the presence or absence of a domain indicating a "1" or "0". Since the field required for propagation is less than that required to divide the domain D the rotating magnetic field has its strength varied so that it is only increased when a domain is to be introduced and then only for the last quarter of the cycle. The overlays for a plurality of propagation channels may be provided on one side of the magnetic layer 11 and the respective input overlays each of different geometry e.g. rectangular, disc or cross-shaped on the other side, Fig. 9 (not shown). The amplitude of the rotating field thus determines the channel into which a domain is introduced. By providing a generalized pattern of overlays domains may be introduced and propagated in X and Y directions. Domains may be introduced into more than one channel from a given input overlay by increasing the amplitude of the rotating field during different quarter cycles, Figs. 10 to 13 (not shown). In a further arrangement three parallel bars of permalloy are used, Figs. 14, 15 (not shown) two of the bars being of low coercive force and the middle one of high coercive force.
ES371265A 1968-08-29 1969-08-28 Domain propagation arrangement Expired ES371265A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US75621068A 1968-08-29 1968-08-29

Publications (1)

Publication Number Publication Date
ES371265A1 true ES371265A1 (en) 1972-03-16

Family

ID=25042487

Family Applications (1)

Application Number Title Priority Date Filing Date
ES371265A Expired ES371265A1 (en) 1968-08-29 1969-08-28 Domain propagation arrangement

Country Status (8)

Country Link
US (1) US3555527A (en)
BE (1) BE738044A (en)
DE (1) DE1943287A1 (en)
ES (1) ES371265A1 (en)
FR (1) FR2016567A1 (en)
GB (1) GB1257857A (en)
NL (1) NL6913095A (en)
SE (1) SE343421B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3611331A (en) * 1969-12-04 1971-10-05 Bell Telephone Labor Inc Single wall domain source
US3633185A (en) * 1970-05-22 1972-01-04 Bell Telephone Labor Inc Single-wall domain generator
US3619636A (en) * 1970-06-01 1971-11-09 Bell Telephone Labor Inc Magnetic domain logic circuit
US3727197A (en) * 1970-12-31 1973-04-10 Ibm Magnetic means for collapsing and splitting of cylindrical domains
US3710356A (en) * 1971-09-08 1973-01-09 Bell Telephone Labor Inc Strip domain propagation arrangement
US4091458A (en) * 1976-06-14 1978-05-23 Rockwell International Corporation Multiple chevron passive generator
US4156937A (en) * 1977-10-12 1979-05-29 Control Data Corporation Noncirculating register for bubble memory systems
US4272817A (en) * 1979-04-02 1981-06-09 Intel Magnetics, Inc. Multiplexed single wall domain generators
US4262070A (en) * 1980-04-18 1981-04-14 Liu Hua Kuang Method of making halftone contact screens

Also Published As

Publication number Publication date
US3555527A (en) 1971-01-12
DE1943287A1 (en) 1970-03-05
BE738044A (en) 1970-02-02
GB1257857A (en) 1971-12-22
FR2016567A1 (en) 1970-05-08
NL6913095A (en) 1970-03-03
SE343421B (en) 1972-03-06

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