GB1490217A - Method of detecting single-wall magnetic domains - Google Patents

Method of detecting single-wall magnetic domains

Info

Publication number
GB1490217A
GB1490217A GB40870/74A GB4087074A GB1490217A GB 1490217 A GB1490217 A GB 1490217A GB 40870/74 A GB40870/74 A GB 40870/74A GB 4087074 A GB4087074 A GB 4087074A GB 1490217 A GB1490217 A GB 1490217A
Authority
GB
United Kingdom
Prior art keywords
current
modulating
output
measuring current
sept
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
GB40870/74A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1490217A publication Critical patent/GB1490217A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
    • G01R33/09—Magnetoresistive devices
    • 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
    • G11C19/0866—Detecting magnetic domains

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Magnetic Variables (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

1490217 Magnetic bubble detectors PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 19 Sept 1974 [22 Sept 1973] 40870/74 Heading H3B Magnetic bubbles are detected by energizing a magneto-resistive element 2 with a measuring current, modulating the bubble diameter by a magnetic field produced by an alternating current (which may be the measuring current), and detecting a component of the output of element 2 which has a frequency different from that of the measuring current. This prevents interference of the output by rotating propagating field components. The modulating current flows in a nickel alloy magneto-resistive element 2 or in a further current loop (6, Fig. 2, not shown) encircling it, in which case A.C. or D.C. flows in the element 2. The detector output is shown to have a D.C. component and harmonics of the modulating frequency, any of which may be filtered for utilization. Alternatively the sum or difference of the alternating currents in the two conductors may be selected. Reference has been directed by the Comptroller to Specification 1,372,516.
GB40870/74A 1973-09-22 1974-09-19 Method of detecting single-wall magnetic domains Expired GB1490217A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7313096,A NL173452C (en) 1973-09-22 1973-09-22 MAGNETIC RESISTANCE DETECTION DEVICE FOR SINGLE-WALL MAGNETIC DOMAINS, WITH INTERFERENCE SUPPRESSION BY MODULATION OF THE DOMAIN DIAMETER.

Publications (1)

Publication Number Publication Date
GB1490217A true GB1490217A (en) 1977-10-26

Family

ID=19819663

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40870/74A Expired GB1490217A (en) 1973-09-22 1974-09-19 Method of detecting single-wall magnetic domains

Country Status (9)

Country Link
JP (1) JPS552675B2 (en)
BE (1) BE820177A (en)
CA (1) CA994423A (en)
DE (1) DE2443449C3 (en)
FR (1) FR2244998B1 (en)
GB (1) GB1490217A (en)
IT (1) IT1022137B (en)
NL (1) NL173452C (en)
SE (1) SE399598B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297755B (en) * 1963-05-10 1969-06-19 Siemens Ag Magnetic field measuring device with a probe with a resistance that depends on the magnetic field
US3523286A (en) * 1968-08-12 1970-08-04 Bell Telephone Labor Inc Magnetic single wall domain propagation device
US3842407A (en) * 1972-06-30 1974-10-15 Ibm Inductive sensor for magnetic bubble domain detection

Also Published As

Publication number Publication date
JPS5061147A (en) 1975-05-26
NL173452C (en) 1984-01-16
JPS552675B2 (en) 1980-01-21
NL7313096A (en) 1975-03-25
DE2443449A1 (en) 1975-03-27
NL173452B (en) 1983-08-16
DE2443449C3 (en) 1981-04-09
SE7411811L (en) 1975-03-24
FR2244998A1 (en) 1975-04-18
SE399598B (en) 1978-02-20
BE820177A (en) 1975-03-20
DE2443449B2 (en) 1980-07-03
CA994423A (en) 1976-08-03
IT1022137B (en) 1978-03-20
FR2244998B1 (en) 1981-03-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee