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JPS54103009A - Vertical magnetic head and magnetically writing method using the same - Google Patents

Vertical magnetic head and magnetically writing method using the same

Info

Publication number
JPS54103009A
JPS54103009A JP881578A JP881578A JPS54103009A JP S54103009 A JPS54103009 A JP S54103009A JP 881578 A JP881578 A JP 881578A JP 881578 A JP881578 A JP 881578A JP S54103009 A JPS54103009 A JP S54103009A
Authority
JP
Japan
Prior art keywords
magnetic
magnetic pole
temperature
ferromagnetic
dependence
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
JP881578A
Other languages
Japanese (ja)
Inventor
Yasuo Sawada
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP881578A priority Critical patent/JPS54103009A/en
Publication of JPS54103009A publication Critical patent/JPS54103009A/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
    • G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier

Landscapes

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

Abstract

PURPOSE:To increase the writing speed with the use of a simple construction by using an auxiliary magnetic pole made of a permanent magnet, a main magnetic pole made of such a magnetic material as will experience its phase shift in dependence upon temperature, and heating means for the main magnetic pole. CONSTITUTION:The transition point of such a magnetic material as will experiences its phase transition between anti- and ferromagnetic properties and anti-ferromagnetic and Ferri magnetic properties in dependence upon the temperature change and as makes up a main magnetic pole 3 is set at a room temperature. A temperature controller is so operated as to maintain the magnetic head as a whole at a temperature lower than the room temperature. At the same time, slith heat is fed from a heater 4. As a result, the phase trnsition abruptly takes place with a temperature range of 2 to 3 deg.C so that the magnetic pole 3 is converted into a ferromagnetic or Ferri magnetic element and is highly magnetized at its leading end by the magnetic field from the auxiliary magnetic pole 1 made of a permanent magnet. As a result, a strong vertical magnetic field is established between the magnetic poles 1 and 3 so that a magnetic medium 2b is magnetized vertically and written. Thus, it is possible to increase the writing speed with the use of a simple construction.
JP881578A 1978-01-31 1978-01-31 Vertical magnetic head and magnetically writing method using the same Pending JPS54103009A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP881578A JPS54103009A (en) 1978-01-31 1978-01-31 Vertical magnetic head and magnetically writing method using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP881578A JPS54103009A (en) 1978-01-31 1978-01-31 Vertical magnetic head and magnetically writing method using the same

Publications (1)

Publication Number Publication Date
JPS54103009A true JPS54103009A (en) 1979-08-14

Family

ID=11703305

Family Applications (1)

Application Number Title Priority Date Filing Date
JP881578A Pending JPS54103009A (en) 1978-01-31 1978-01-31 Vertical magnetic head and magnetically writing method using the same

Country Status (1)

Country Link
JP (1) JPS54103009A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2588406A1 (en) * 1985-10-04 1987-04-10 Thomson Csf THERMOMAGNETIC RECORDING HEAD AND METHOD OF MAKING
US7023660B2 (en) 2003-07-21 2006-04-04 Hitachi Global Storage Technologies Netherlands B.V. Localized pole tip heating device for magnetic head for hard disk drive
US8199429B2 (en) 2007-03-30 2012-06-12 Kabushiki Kaisha Toshiba Magnetic recording head and magnetic recording method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2588406A1 (en) * 1985-10-04 1987-04-10 Thomson Csf THERMOMAGNETIC RECORDING HEAD AND METHOD OF MAKING
US4949198A (en) * 1985-10-04 1990-08-14 Thomson-Csf Thermomagnetic recording head and mode of embodiment
US7023660B2 (en) 2003-07-21 2006-04-04 Hitachi Global Storage Technologies Netherlands B.V. Localized pole tip heating device for magnetic head for hard disk drive
US8199429B2 (en) 2007-03-30 2012-06-12 Kabushiki Kaisha Toshiba Magnetic recording head and magnetic recording method
US8284518B2 (en) 2007-03-30 2012-10-09 Kabushiki Kaisha Toshiba Magnetic recording head

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