JPS5514544A - Magnetic head - Google Patents

Magnetic head

Info

Publication number
JPS5514544A
JPS5514544A JP8717978A JP8717978A JPS5514544A JP S5514544 A JPS5514544 A JP S5514544A JP 8717978 A JP8717978 A JP 8717978A JP 8717978 A JP8717978 A JP 8717978A JP S5514544 A JPS5514544 A JP S5514544A
Authority
JP
Japan
Prior art keywords
less
machining
mhz
permeability
ratio
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.)
Granted
Application number
JP8717978A
Other languages
Japanese (ja)
Other versions
JPS6249645B2 (en
Inventor
Makoto Matsunaga
Teizo Tamura
Kenji Hayashi
Sanehiro Kudo
Tsutomu Iimura
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.)
Hitachi Ltd
Proterial Ltd
Original Assignee
Hitachi Ltd
Hitachi Metals 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 Hitachi Ltd, Hitachi Metals Ltd filed Critical Hitachi Ltd
Priority to JP8717978A priority Critical patent/JPS5514544A/en
Publication of JPS5514544A publication Critical patent/JPS5514544A/en
Publication of JPS6249645B2 publication Critical patent/JPS6249645B2/ja
Granted 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
    • G11B5/133—Structure or manufacture of heads, e.g. inductive with cores composed of particles, e.g. with dust cores, with ferrite cores with cores composed of isolated magnetic particles
    • G11B5/1335—Assembling or shaping of elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

PURPOSE:To increase the performance and to improve the yield rate, by performing machining after splitting the block into small blocks satisfying specific conditions, in machining a greater block of Mn-Zn ferrite into magnetic heads. CONSTITUTION:The substrates are cut out from several ingots of Mn-Zn ferrite single crystal made from the material preparing Fe2O3,MnO,ZnO in the ratio of 50, 30,20 respectively in weight percentage and measurement for various performances is made. The yield rate can be increased from the machining to small blocks satisfying the following: 400 or more permeability at 5MHz, 3,5 or less in the ratio of the permeability at 0.5 and 5 MHz, 1.5 or less in tandelta at 0.5 and 5 MHz, 150 deg.C or more in Curie temperature, 4300 G or less in the magnetic flux with external magnetic field of 10 Oe,. 0.04 Oe. or less in coersive force, and 0.2 ohm-cm or more in electric resistance.
JP8717978A 1978-07-19 1978-07-19 Magnetic head Granted JPS5514544A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8717978A JPS5514544A (en) 1978-07-19 1978-07-19 Magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8717978A JPS5514544A (en) 1978-07-19 1978-07-19 Magnetic head

Publications (2)

Publication Number Publication Date
JPS5514544A true JPS5514544A (en) 1980-02-01
JPS6249645B2 JPS6249645B2 (en) 1987-10-20

Family

ID=13907753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8717978A Granted JPS5514544A (en) 1978-07-19 1978-07-19 Magnetic head

Country Status (1)

Country Link
JP (1) JPS5514544A (en)

Also Published As

Publication number Publication date
JPS6249645B2 (en) 1987-10-20

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