GB1257857A - - Google Patents

Info

Publication number
GB1257857A
GB1257857A GB1257857DA GB1257857A GB 1257857 A GB1257857 A GB 1257857A GB 1257857D A GB1257857D A GB 1257857DA GB 1257857 A GB1257857 A GB 1257857A
Authority
GB
United Kingdom
Prior art keywords
domain
channel
rotating
propagation
magnetic
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
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 filed Critical
Publication of GB1257857A publication Critical patent/GB1257857A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C19/00Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/02Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
    • G11C19/08Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure
    • G11C19/0808Digital 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
    • G11C19/0816Digital 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C19/00Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/02Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
    • G11C19/08Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure
    • G11C19/0858Generating, replicating or annihilating magnetic domains (also comprising different types of magnetic domains, e.g. "Hard Bubbles")
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M12/00Hybrid cells; Manufacture thereof
    • H01M12/04Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K17/00Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/80Electronic 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
    • H03K17/84Electronic 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)
  • Burglar Alarm Systems (AREA)
  • Mram Or Spin Memory Techniques (AREA)
  • Hall/Mr Elements (AREA)

Abstract

1,257,857. Magnetic storage devices. WESTERN ELECTRIC CO. Inc. 27 Aug., 1969 [29 Aug., 1968], No. 42605/69. Heading H3B. 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, B<SP>1</SP> 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 D<SP>1</SP> 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.
GB1257857D 1968-08-29 1969-08-27 Expired GB1257857A (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
GB1257857A true GB1257857A (en) 1971-12-22

Family

ID=25042487

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1257857D Expired GB1257857A (en) 1968-08-29 1969-08-27

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
BE738044A (en) 1970-02-02
FR2016567A1 (en) 1970-05-08
DE1943287A1 (en) 1970-03-05
SE343421B (en) 1972-03-06
NL6913095A (en) 1970-03-03
ES371265A1 (en) 1972-03-16

Similar Documents

Publication Publication Date Title
GB1257857A (en)
GB1235930A (en) Improvements in or relating to information storage arrangements
GB1482942A (en) Variable delay line
FR1504169A (en) Permanent magnet magnetic circuit
IE36253L (en) Magnetic device
GB923178A (en) Improvements in or relating to radio apparatus for use in a continuous wave radio system
US3540021A (en) Inverted mode domain propagation device
GB956333A (en) Improvements in information signal storage device
US3602911A (en) Single wall magnetic domain propagation arrangement
US3611331A (en) Single wall domain source
GB1090443A (en) Reciprocal microwave apparatus
GB1001156A (en) Signal routing devices
US3453606A (en) Magnetic domain propagation device
AT276548B (en) Magnetic field operated contactor
SU557445A1 (en) Super high frequency circulator
McKay et al. Effect of previous history on switching rate in ferrites
US3293625A (en) Multi-aperture core shift register
GB927909A (en) Gating circuit
BETCHOV et al. Magnetic probes are used in a linear plasma pinch, stabilized by an initial magnetic field, to study magnetohydrodynamic turbulence
GB1256156A (en) Improvements in or relating to magnetic devices
RAJAGOPAL et al. Nature of electromagnetic field, scattered from a perfectly-conducting half plane in a homogeneous anisotropic plasma subjected to a magnetic field
CA676062A (en) Ferrite with constricted magnetic hysteresis loop
ILENKO et al. Study of the polarization of a plasma moving in a helical magnetic field(Potential difference and electric polarization field measurement in plasma moving in combined toroidal and helical magnetic field of stellarator type)
GB1239775A (en) Magnetic memory core
GB1138588A (en) Improvements relating to semi-permanent magnetic memory elements and memory matrixes using such elements

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees
PLNP Patent lapsed through nonpayment of renewal fees