US3451793A - Magnetic thin film wire with multiple laminated film coating - Google Patents

Magnetic thin film wire with multiple laminated film coating Download PDF

Info

Publication number
US3451793A
US3451793A US3451793DA US3451793A US 3451793 A US3451793 A US 3451793A US 3451793D A US3451793D A US 3451793DA US 3451793 A US3451793 A US 3451793A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
film
wire
thin
magnetic
percent
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 - Lifetime
Application number
Inventor
Akira Matsushita
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.)
Toko Inc
Original Assignee
Toko 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
Grant date

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00Communication cables or conductors
    • H01B11/02Cables with twisted pairs or quads
    • H01B11/12Arrangements for exhibiting specific transmission characteristics
    • H01B11/14Continuously inductively loaded cables, e.g. Krarup cables
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00Stock material or miscellaneous articles
    • Y10S428/90Magnetic feature
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00Stock material or miscellaneous articles
    • Y10S428/922Static electricity metal bleed-off metallic stock
    • Y10S428/9265Special properties
    • Y10S428/928Magnetic property
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00Stock material or miscellaneous articles
    • Y10S428/922Static electricity metal bleed-off metallic stock
    • Y10S428/9265Special properties
    • Y10S428/931Components of differing electric conductivity
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/12All metal or with adjacent metals
    • Y10T428/12465All metal or with adjacent metals having magnetic properties, or preformed fiber orientation coordinate with shape
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/12All metal or with adjacent metals
    • Y10T428/12493Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771Transition metal-base component
    • Y10T428/12861Group VIII or IB metal-base component
    • Y10T428/12882Cu-base component alternative to Ag-, Au-, or Ni-base component
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/12All metal or with adjacent metals
    • Y10T428/12493Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771Transition metal-base component
    • Y10T428/12861Group VIII or IB metal-base component
    • Y10T428/12944Ni-base component
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/12All metal or with adjacent metals
    • Y10T428/12493Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771Transition metal-base component
    • Y10T428/12861Group VIII or IB metal-base component
    • Y10T428/12951Fe-base component

Description

J1me 1969 AKIRA MATSUSHITA 3,451,793

MAGNETIC THIN FILM WIRE WITH MULTIPLE LAMINATED FILM COATING Filed Dec. 12, 1966 FIG. 4

Ni I

COERCIVE FORCE. HC 0 m 4 m TEMPERATURE INVENTOR.

' mum nm-susni-m Patented June 24, 1969 rm. Cl. Hillb 1/02 US. Cl. 29194 7 Claims This invention relates to wires coated with magnetic thin films (herein referred to as magnetic thin film wire) suitable foruse principally in memory elements and parametron elements. More particularly the invention concerns a new and improved magnetic thin film wire which is not subject to magnetostriction, has almost zero temperature coeflicient, and has extremely stable characteristics.

Magnetic thin film wires of the type referred to above consist of a conductor core wire coated with a magnetic thin film such as Permalloy applied on the conductor wire by electrodeposition. In general, since the magnetic thin film is affected by ambient temperatures, variations in temperature cause fluctuations in the magnetic characteristics, particularly the coercive force He, and, moreover, is readily subjected to magnetostriction.

It is an object of the present invention to provide a magnetic thin film wire which is almost completely free of magnetostriction, having a temperature coefficient close to zero, and having a remarkably stable characteristics.

Briefly stated, a feature of the magnetic thin film wire of the invention is that on the surfaces of a single conductor core wire, at least one thin film of an iron-nickel alloy of a compositional ratio of 50 percent of iron and 50 percent of nickel and at least one thin film of an iron-' nickel alloy of a compositional ratio of 21 percent of iron and 79 percent of nickel are deposited in laminate arrangement.

The nature and details of the invention will be more clearly apparent from the following detailed description with respect to preferred embodiments of the invention when read in conjunction with the accompanying drawing, in which like parts are designated by like reference numerals.

In the drawing:

FIGS. 1, 2, and 3 are fragmentary perspective views, with parts cut away, showing examples of magnetic thin film wire embodying the invention; and

FIG. 4 is a graphical representation indicating the relationship between temperature and coercive force in various components of the magnetic thin film wire according to the invention.

Referring to FIGS. 1, 2, and 3, there are shown examples of magnetic thin film wire embodying the invention. In each wire, a conductor core wire 1 is coated with at least one magnetic thin film 2 of an allow (hereinafter referred to as allow A) of 50 percent Fe and 50 percent Ni, and at least one magnetic thin film 3 of an alloy (hereinafter referred to as alloy B) of 21 percent Fe and 79 percent Ni.

FIG. 1 illustrates the most simple example in which the conductor core wire 1 is coated with one film 2 of alloy A which in turn is coated with one film 3 of alloy B. According to the invention, a plurality of alternate layers of films 2 and 3 may be deposited as illustrated in FIG. 2. I

Furthermore, an intermediate layer 4 of a conductor such as gold, silver, and copper or an insulating material can be interposed between magnetic thin films 2 and 3 as illustrated in FIG. 3. In this case, mutual interference between the magnetic thin films 2 and 3 can be reduced, and, by suitably selecting the material, thickness, and other features. of the intermediate film layer 4, magnetic thin film wires of various magnetization characteristics can be obtained.

The magnetization easy axes of the magnetic thin films 2 and 3 can be respectively selected as desired to be in the wire circumferential direction or the wire axial direction, it being possible to cause the two easy axes to be in the same direction or to be independently in different directions.

Alloy A (50% Fe, 50% Ni) and alloy B (21% Fe, 79% Ni) both have compositions which are not subject to magnetostriction and their respective temperature characteristics are as indicated in FIG. 4.

I have found that when a magnetic thin film wire is provided with composite layers of films of alloys A and B according to the invention, the temperature characteristic of the entire magnetic thin film wire becomes that as indicated by curve C in FIG. 4, whereby the temperature coefficient with respect to He is almost zero.

Moreover, since both of the alloys A and B have composition which, from the beginning, are not subject to magnetostriction, it is possible to produce a magnetic thin film wire which is not subject to magnetostriction, has practically zero temperature coefficient, and has extremely stable characteristics even when films of the alloys A and B are deposited in composite arrangement.

It should be understood, of course, that the foregoing disclosure relates to only preferred embodiments of the invention and that it is intended to cover all changes and modifications of the examples of the invention herein chosen for the purposes of the disclosure, which do not constitute departures from the spirit and scope of the invention as set forth in the appended claims.

What I claim is:

1. A magnetic thin film wire comprising a conductor core wire, at least one first film of an iron-nickel alloy containing 50 percent of iron and 50 percent of nickel, and at least one second film of an iron-nickel alloy containing 21 percent of iron and 79 percent of nickel, said first and second films being deposited to envelope the conductor core wire in alternate laminated layers.

2. A magnetic thin film' wire comprising a conductor core wire, at least one first film of an iron-nickel alloy containing 50 percent of iron and 50 percent of nickel, at least one second film of an iron-nickel alloy containing 21 percent of iron and 79 percent of nickel, and at least one intermediate film, said first and second films being deposited to envelope the conductor core wire in alternate laminated layers with said intermediate film interposed between adjacent first and second film.

3. The magnetic thin film wire as claimed in claim 2 in which the intermediate film is an electrical conductor.

4. The magnetic thin film as claimed in claim 2 in which the intermediate film is an electrical insulator.

5. The magnetic thin film wire as claimed in claim 1 in which all first and second films are caused to have magnetization easy axes in the wire axial direction.

6. The magnetic thin film wire as claimed in claim 1 in which all first and second films are caused to have magnetization easy axes in the wire circumferential direction.

7. The magnetic thin film wire as claimed in clainrl ""3-,-2-13,43'1 10/ 1965 Kolk etal. '340-174 in which either of the first and second films is caused to 3,328,195 6/1967 May 29-194 X have a. magnetization easy axis in a first direction and 3,350,180 10/1967 Croll 29--183.5 the other is caused to have a magnetization easy axis in a 3,375,091 3/1968 Feldtkeller 29--194 direction different from said first direction. 5

L. DEWAYNE RUTLEDGE, Primary Examiner.

References Cited E. L. WEISE, Assistant Examiner.

UNITED STATES PATENTS 2,853,402 9/1958 BlOiS 340-174 X 3,089,228 5/1963 Lynch 29-194 10 29 19s, 196.1, 196.6; 340 174

Claims (1)

1. A MAGNETIC THIN FILM WIRE COMPRISING A CONDUCTOR CORE WIRE, AT LEAST ONE FIRST FILM OF AN IRON-NICKEL ALLOY CONTAINING 50 PERCENT OF IRON AND 50 PERCENT OF NICKEL, AND AT LEAST ONE SECOND FILM OF AN IRON-NICKEL ALLOY CONTAINING 21 PERCENT OF IRON AND 79 PERCENT OF NICKEL, SAID FIRST AND SECOND FILMS BEING DEPOSITED TO ENVELOPE THE CONDUCTOR CORE WIRE IN ALTERNATE LAMINATED LAYERS.
US3451793A 1966-02-12 1966-12-12 Magnetic thin film wire with multiple laminated film coating Expired - Lifetime US3451793A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP823366 1966-02-12

Publications (1)

Publication Number Publication Date
US3451793A true US3451793A (en) 1969-06-24

Family

ID=11687421

Family Applications (1)

Application Number Title Priority Date Filing Date
US3451793A Expired - Lifetime US3451793A (en) 1966-02-12 1966-12-12 Magnetic thin film wire with multiple laminated film coating

Country Status (1)

Country Link
US (1) US3451793A (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3531783A (en) * 1965-08-09 1970-09-29 Sperry Rand Corp Multilayer magnetic wire memory
US3576552A (en) * 1967-12-26 1971-04-27 Ibm Cylindrical magnetic memory element having plural concentric magnetic layers separated by a nonmagnetic barrier layer
US3637443A (en) * 1969-11-28 1972-01-25 Motorola Inc Method for annealing magnetic wire
US3736576A (en) * 1970-11-27 1973-05-29 Plated wire magnetic memory device
US3757754A (en) * 1971-09-28 1973-09-11 Milton Velinsky Ignition system
US3922651A (en) * 1972-10-26 1975-11-25 Kokusai Denshin Denwa Co Ltd Memory device using ferromagnetic substance lines
US3994694A (en) * 1975-03-03 1976-11-30 Oxy Metal Industries Corporation Composite nickel-iron electroplated article
US3999174A (en) * 1975-09-19 1976-12-21 The United States Of America As Represented By The Secretary Of The Navy Discontinuous chromium film for memory element
US4180699A (en) * 1978-06-19 1979-12-25 Gte Sylvania Incorporated Shielded electrically conductor
US4374403A (en) * 1979-06-27 1983-02-15 Matsushita Electric Industrial Co., Ltd. Magnetic recording and reproducing system
US5736235A (en) * 1990-08-20 1998-04-07 Hitachi, Ltd. Magnetic recording medium having at least two magnetic layers with easy axes oriented in the same direction
US20030140490A1 (en) * 2001-03-08 2003-07-31 Olson Kevin C. Multi-layer circuit assembly and process for preparing the same
US20040000049A1 (en) * 2001-03-08 2004-01-01 Mccollum Gregory J. Process for fabricating circuit assemblies using electrodepositable dielectric coating compositions
US6713587B2 (en) * 2001-03-08 2004-03-30 Ppg Industries Ohio, Inc. Electrodepositable dielectric coating compositions and methods related thereto
US6824959B2 (en) 2002-06-27 2004-11-30 Ppg Industries Ohio, Inc. Process for creating holes in polymeric substrates
US20050006138A1 (en) * 2002-06-27 2005-01-13 Wang Alan E. Single or multi-layer printed circuit board with recessed or extended breakaway tabs and method of manufacture thereof
US20060213685A1 (en) * 2002-06-27 2006-09-28 Wang Alan E Single or multi-layer printed circuit board with improved edge via design
US8065795B2 (en) 2001-03-08 2011-11-29 Ppg Industries Ohio, Inc Multi-layer circuit assembly and process for preparing the same
US20140138366A1 (en) * 2012-11-16 2014-05-22 GM Global Technology Operations LLC Self-adjusting wire for welding applications
WO2015006660A3 (en) * 2013-07-12 2015-11-26 The University Of Florida Reearch Foundation, Inc. Low ohmic loss radial superlattice conductors

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2853402A (en) * 1954-08-06 1958-09-23 Jr Marsden S Blois Magnetic element and method for producing the same
US3089228A (en) * 1957-07-26 1963-05-14 Post Office Magnetic strip material
US3213431A (en) * 1960-12-21 1965-10-19 Ncr Co Bilayer magnetic device operating as a single layer device
US3328195A (en) * 1962-11-30 1967-06-27 Ibm Magnetic recording medium with two storage layers for recording different signals
US3350180A (en) * 1967-10-31 Magnetic device with alternating lami- na of magnetic material and non-mag- netic metal on a substrate
US3375091A (en) * 1964-03-17 1968-03-26 Siemens Ag Storer with memory elements built up of thin magnetic layers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350180A (en) * 1967-10-31 Magnetic device with alternating lami- na of magnetic material and non-mag- netic metal on a substrate
US2853402A (en) * 1954-08-06 1958-09-23 Jr Marsden S Blois Magnetic element and method for producing the same
US3089228A (en) * 1957-07-26 1963-05-14 Post Office Magnetic strip material
US3213431A (en) * 1960-12-21 1965-10-19 Ncr Co Bilayer magnetic device operating as a single layer device
US3328195A (en) * 1962-11-30 1967-06-27 Ibm Magnetic recording medium with two storage layers for recording different signals
US3375091A (en) * 1964-03-17 1968-03-26 Siemens Ag Storer with memory elements built up of thin magnetic layers

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3531783A (en) * 1965-08-09 1970-09-29 Sperry Rand Corp Multilayer magnetic wire memory
US3576552A (en) * 1967-12-26 1971-04-27 Ibm Cylindrical magnetic memory element having plural concentric magnetic layers separated by a nonmagnetic barrier layer
US3637443A (en) * 1969-11-28 1972-01-25 Motorola Inc Method for annealing magnetic wire
US3736576A (en) * 1970-11-27 1973-05-29 Plated wire magnetic memory device
US3757754A (en) * 1971-09-28 1973-09-11 Milton Velinsky Ignition system
US3922651A (en) * 1972-10-26 1975-11-25 Kokusai Denshin Denwa Co Ltd Memory device using ferromagnetic substance lines
US3994694A (en) * 1975-03-03 1976-11-30 Oxy Metal Industries Corporation Composite nickel-iron electroplated article
US3999174A (en) * 1975-09-19 1976-12-21 The United States Of America As Represented By The Secretary Of The Navy Discontinuous chromium film for memory element
US4180699A (en) * 1978-06-19 1979-12-25 Gte Sylvania Incorporated Shielded electrically conductor
US4374403A (en) * 1979-06-27 1983-02-15 Matsushita Electric Industrial Co., Ltd. Magnetic recording and reproducing system
US5736235A (en) * 1990-08-20 1998-04-07 Hitachi, Ltd. Magnetic recording medium having at least two magnetic layers with easy axes oriented in the same direction
US7228623B2 (en) 2001-03-08 2007-06-12 Ppg Industries Ohio, Inc. Process for fabricating a multi layer circuit assembly
US20040000049A1 (en) * 2001-03-08 2004-01-01 Mccollum Gregory J. Process for fabricating circuit assemblies using electrodepositable dielectric coating compositions
US6713587B2 (en) * 2001-03-08 2004-03-30 Ppg Industries Ohio, Inc. Electrodepositable dielectric coating compositions and methods related thereto
US20030140490A1 (en) * 2001-03-08 2003-07-31 Olson Kevin C. Multi-layer circuit assembly and process for preparing the same
US8598467B2 (en) 2001-03-08 2013-12-03 PPG Industries Chio, Inc. Multi-layer circuit assembly and process for preparing the same
US8065795B2 (en) 2001-03-08 2011-11-29 Ppg Industries Ohio, Inc Multi-layer circuit assembly and process for preparing the same
US7000313B2 (en) 2001-03-08 2006-02-21 Ppg Industries Ohio, Inc. Process for fabricating circuit assemblies using electrodepositable dielectric coating compositions
US6824959B2 (en) 2002-06-27 2004-11-30 Ppg Industries Ohio, Inc. Process for creating holes in polymeric substrates
US20060075633A1 (en) * 2002-06-27 2006-04-13 Wang Alan E Single or multi-layer printed circuit board with recessed or extended breakaway tabs and method of manufacture thereof
US20060213685A1 (en) * 2002-06-27 2006-09-28 Wang Alan E Single or multi-layer printed circuit board with improved edge via design
US7159308B2 (en) 2002-06-27 2007-01-09 Ppg Industries Ohio, Inc. Method of making a circuit board
US7002081B2 (en) 2002-06-27 2006-02-21 Ppg Industries Ohio, Inc. Single or multi-layer printed circuit board with recessed or extended breakaway tabs and method of manufacture thereof
US20060005995A1 (en) * 2002-06-27 2006-01-12 Wang Alan E Circuit board and method of manufacture thereof
US20050006138A1 (en) * 2002-06-27 2005-01-13 Wang Alan E. Single or multi-layer printed circuit board with recessed or extended breakaway tabs and method of manufacture thereof
US20140138366A1 (en) * 2012-11-16 2014-05-22 GM Global Technology Operations LLC Self-adjusting wire for welding applications
WO2015006660A3 (en) * 2013-07-12 2015-11-26 The University Of Florida Reearch Foundation, Inc. Low ohmic loss radial superlattice conductors
US9679671B2 (en) 2013-07-12 2017-06-13 University Of Florida Reasearch Foundation, Inc. Low ohmic loss radial superlattice conductors

Similar Documents

Publication Publication Date Title
US4825325A (en) Magnetoresistive read transducer assembly
US3555169A (en) Composite layer material having an outer layer of copper and successive layer of stainless steel, low carbon steel and copper
US3366728A (en) Superconductor wires
US6430085B1 (en) Magnetic random access memory having digit lines and bit lines with shape and induced anisotropy ferromagnetic cladding layer and method of manufacture
US4959631A (en) Planar inductor
US4857418A (en) Resistive overlayer for magnetic films
US4689444A (en) Electrical cable apparatus
US4052749A (en) Thin film magnetic head
US4589042A (en) Composite thin film transducer head
US5961746A (en) Corrosion resistant amorphous magnetic alloys
US3102793A (en) Thermostat metal
US5801124A (en) Laminated superconducting ceramic composite conductors
US4748089A (en) Multilayered ferromagnetic amorphous alloy film and magnetic head employing the same
US4251795A (en) Semiconductor magnetoresistive element having a differential effect
US2677019A (en) Magnetic head and method of making same
US3350180A (en) Magnetic device with alternating lami- na of magnetic material and non-mag- netic metal on a substrate
US3662119A (en) Thin film magnetic transducer head
US5569544A (en) Magnetoresistive structure comprising ferromagnetic thin films and intermediate layers of less than 30 angstroms formed of alloys having immiscible components
US4640871A (en) Magnetic material having high permeability in the high frequency range
US5617071A (en) Magnetoresistive structure comprising ferromagnetic thin films and intermediate alloy layer having magnetic concentrator and shielding permeable masses
US3723665A (en) Integrated magnetic head having alternate conducting and insulating layers within an open loop of two magnetic films
US3629776A (en) Sliding thin film resistance for measuring instruments
US4780781A (en) Thin film magnetic head having magnetic film of Co-Ni-Fe alloy
US3684464A (en) Composite metal laminate material and lead frame
US6120918A (en) Co-Fe-Ni thin magnetic film, process for producing the same, composite thin film magnetic head, and magnetic recording device