GB1487862A – Forming magnetic bubble domain lattice
– Google Patents
GB1487862A – Forming magnetic bubble domain lattice
– Google Patents
Forming magnetic bubble domain lattice
Info
Publication number
GB1487862A
GB1487862A
GB22870/75A
GB2287075A
GB1487862A
GB 1487862 A
GB1487862 A
GB 1487862A
GB 22870/75 A
GB22870/75 A
GB 22870/75A
GB 2287075 A
GB2287075 A
GB 2287075A
GB 1487862 A
GB1487862 A
GB 1487862A
Authority
GB
United Kingdom
Prior art keywords
field
film
bubble
bias
plane
Prior art date
1974-10-25
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
GB22870/75A
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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.)
1974-10-25
Filing date
1975-05-23
Publication date
1977-10-05
1975-05-23
Application filed by International Business Machines Corp
filed
Critical
International Business Machines Corp
1977-10-05
Publication of GB1487862A
publication
Critical
patent/GB1487862A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
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
G11C19/0833—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 magnetic domain interaction
G—PHYSICS
G11—INFORMATION STORAGE
G11C—STATIC STORES
G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
G11C11/14—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using thin-film elements
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
H01F10/00—Thin magnetic films, e.g. of one-domain structure
Abstract
1487862 Forming magnetic bubble lattices INTERNATIONAL BUSINESS MACHINES CORP 23 May 1975 [25 Oct 1974] 22870/75 Heading H3B A magnetic bubble lattice is formed by subjecting a confined area of a bubble supporting film to an A.C. in plane magnetic field to produce or align parallel stripe domains, and generating bubbles from the stripes. A EuYGaFe film on a Gd 3 Ga 5 O 12 substrate is formed with a permalloy or ion-mixed raised border 12, an SiO 2 insulating layer then titanium-gold conductors 18, 16. The film contains natural serpentine domains 14 or ones formed by subjecting the film to an A.C. 5 Oe perpendicular modulating field with or without an A.C. 20 Oe perpendicular field in the presence of a D.C. 20 Oe in plane or perpendicular bias field. An A.C. 500 Oe in plane field then produces parallel stripe domains after which the perpendicular A.C. fields are removed and the D.C. bias increased to 30 Oe. A 200 mA, 100 nsec. pulse is first applied to conductor 18 to divide the stripes then to conductor 16 to generate a bubble between them. The D.C. bias is reduced again to 20 Oe with an A.C. 50e modulating field after which 8 mA, 1 msec. pulses alternately applied to the conductors generate and shift bubbles into the lattice.
GB22870/75A
1974-10-25
1975-05-23
Forming magnetic bubble domain lattice
Expired
GB1487862A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US05/517,990
US3953842A
(en)
1974-10-25
1974-10-25
Bubble lattice initialization
Publications (1)
Publication Number
Publication Date
GB1487862A
true
GB1487862A
(en)
1977-10-05
Family
ID=24062073
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB22870/75A
Expired
GB1487862A
(en)
1974-10-25
1975-05-23
Forming magnetic bubble domain lattice
Country Status (7)
Country
Link
US
(1)
US3953842A
(en)
JP
(1)
JPS5154343A
(en)
CA
(1)
CA1048152A
(en)
DE
(1)
DE2542291A1
(en)
FR
(1)
FR2289024A1
(en)
GB
(1)
GB1487862A
(en)
IT
(1)
IT1042377B
(en)
Families Citing this family (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4149265A
(en)
*
1977-04-11
1979-04-10
Sperry Rand Corporation
Method of improving the operation of a single wall domain memory system
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3753814A
(en)
*
1970-12-28
1973-08-21
North American Rockwell
Confinement of bubble domains in film-substrate structures
US3869683A
(en)
*
1974-01-25
1975-03-04
Us Army
Variable broadband delay line
US3876996A
(en)
*
1974-04-08
1975-04-08
Hughes Aircraft Co
Method of generating cylindrical magnetic domains
1974
1974-10-25
US
US05/517,990
patent/US3953842A/en
not_active
Expired – Lifetime
1975
1975-05-23
GB
GB22870/75A
patent/GB1487862A/en
not_active
Expired
1975-08-11
FR
FR7525827A
patent/FR2289024A1/en
active
Granted
1975-09-09
IT
IT27030/75A
patent/IT1042377B/en
active
1975-09-10
JP
JP50109054A
patent/JPS5154343A/en
active
Granted
1975-09-18
CA
CA236,292A
patent/CA1048152A/en
not_active
Expired
1975-09-23
DE
DE19752542291
patent/DE2542291A1/en
not_active
Withdrawn
Also Published As
Publication number
Publication date
US3953842A
(en)
1976-04-27
JPS5154343A
(en)
1976-05-13
FR2289024B1
(en)
1978-04-07
JPS5522876B2
(en)
1980-06-19
FR2289024A1
(en)
1976-05-21
IT1042377B
(en)
1980-01-30
CA1048152A
(en)
1979-02-06
DE2542291A1
(en)
1976-04-29
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Legal Events
Date
Code
Title
Description
1978-02-15
PS
Patent sealed [section 19, patents act 1949]
1981-01-28
PCNP
Patent ceased through non-payment of renewal fee
