JPS57191819A - Magnetic head - Google Patents

Magnetic head

Info

Publication number
JPS57191819A
JPS57191819A JP7625081A JP7625081A JPS57191819A JP S57191819 A JPS57191819 A JP S57191819A JP 7625081 A JP7625081 A JP 7625081A JP 7625081 A JP7625081 A JP 7625081A JP S57191819 A JPS57191819 A JP S57191819A
Authority
JP
Japan
Prior art keywords
magnetic
thin film
gap
ferrite
back core
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.)
Pending
Application number
JP7625081A
Other languages
Japanese (ja)
Inventor
Yuji Nagata
Takahisa Aoi
Keizo Ishiwatari
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7625081A priority Critical patent/JPS57191819A/en
Publication of JPS57191819A publication Critical patent/JPS57191819A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures

Abstract

PURPOSE:To obtain a magnetic head which exerts no bad influence upon a running system for a magnetic recording medium and is free of problems of position precision, by providing a magnetic resistance effect element near the back gap of a ring head, and then using ferrite as a back core material. CONSTITUTION:A nonmagnetic material is provided in the back gap 13 between the back cores 12 of a ring head to form a gap which is 1-10mum wide and 200-1,000mum long. Since ferrite with high magnetic permeability used as the back core material is nonconductive, a ferromagnetic thin film 21 of ''Permalloy '' is vapor-deposited directly on the back core 12 and electrodes 22 and 22' of gold, etc., are provided on both its sides. On the ferromagnetic thin film 21, a hard magnetic thin film or conductive thin film 25 for applying a bias magnetic field is provided with an insulating layer 24 in-between, thus constituting a magnetic resistance effect element 14. A front core part 11 is bonded to the back core 12. Since leakage magnetic flux of the back gap part is utilized, no evil influence upon a running system for a magnetic recording medium is exerted and there is no problem of position percision.
JP7625081A 1981-05-19 1981-05-19 Magnetic head Pending JPS57191819A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7625081A JPS57191819A (en) 1981-05-19 1981-05-19 Magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7625081A JPS57191819A (en) 1981-05-19 1981-05-19 Magnetic head

Publications (1)

Publication Number Publication Date
JPS57191819A true JPS57191819A (en) 1982-11-25

Family

ID=13599940

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7625081A Pending JPS57191819A (en) 1981-05-19 1981-05-19 Magnetic head

Country Status (1)

Country Link
JP (1) JPS57191819A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0331135A2 (en) * 1988-03-03 1989-09-06 Alcatel SEL Aktiengesellschaft Apparatus for the determination of magnetic domains
FR2645314A1 (en) * 1989-03-29 1990-10-05 Commissariat Energie Atomique MAGNETIC HEAD WITH MAGNETORESISTANCE FOR LONGITUDINAL RECORDING AND METHOD OF MAKING SUCH A HEAD

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0331135A2 (en) * 1988-03-03 1989-09-06 Alcatel SEL Aktiengesellschaft Apparatus for the determination of magnetic domains
EP0331135A3 (en) * 1988-03-03 1992-03-04 Alcatel SEL Aktiengesellschaft Apparatus for the determination of magnetic domains
FR2645314A1 (en) * 1989-03-29 1990-10-05 Commissariat Energie Atomique MAGNETIC HEAD WITH MAGNETORESISTANCE FOR LONGITUDINAL RECORDING AND METHOD OF MAKING SUCH A HEAD

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