JPS5459108A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5459108A
JPS5459108A JP12513477A JP12513477A JPS5459108A JP S5459108 A JPS5459108 A JP S5459108A JP 12513477 A JP12513477 A JP 12513477A JP 12513477 A JP12513477 A JP 12513477A JP S5459108 A JPS5459108 A JP S5459108A
Authority
JP
Japan
Prior art keywords
recording
magnetic
thin film
magnetized axis
anisotropic
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
JP12513477A
Other languages
Japanese (ja)
Other versions
JPS571047B2 (en
Inventor
Shiro Nakagawa
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.)
TDK Corp
Original Assignee
TDK 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.)
Filing date
Publication date
Application filed by TDK Corp filed Critical TDK Corp
Priority to JP12513477A priority Critical patent/JPS5459108A/en
Publication of JPS5459108A publication Critical patent/JPS5459108A/en
Publication of JPS571047B2 publication Critical patent/JPS571047B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE: To improve the reproduction output and S/N of short wavelength recording by composing a vertical magnetization method recording medium in two-layer cons- truction of magnetic thin film of uniaxial anisotropy having large coercive force and magnetic body for recording and applying bias magnetic field at the same time when recording and reproduction.
CONSTITUTION: On a base 12 made of nonmagnetic material are placed a uniaxial anisotropic magnetic thin film 10 having a hardly magnetized axis in direction H (running direction of recording medium) and an easily magnetized axis in direction E ion the figure, and a recording magnetic body 11. to constitute a relording medium. For said uniaxil anisotropic thin film 10, Ni-Fe- Co base or Ni-Fe-Mo base alloy is vapor-deposited or electro-deposited in the magnetic field, and the anisotropic magnetic field of the film should be preferably about 5 to 100 oersteds. When recording, using bias source 13, bias magneftic field is applied in the direction of hardly magnetized axis of uniaxial anisotropic thin film 10 only in the vicinity of recording point by head 14 in order to apparently reduce the coercive force in the direction of easily magnetized axis, so that the magnetic permeability may be increased. Hence, the diffusion of recorded part may be prevented
COPYRIGHT: (C)1979,JPO&Japio
JP12513477A 1977-10-20 1977-10-20 Magnetic recording medium Granted JPS5459108A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12513477A JPS5459108A (en) 1977-10-20 1977-10-20 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12513477A JPS5459108A (en) 1977-10-20 1977-10-20 Magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS5459108A true JPS5459108A (en) 1979-05-12
JPS571047B2 JPS571047B2 (en) 1982-01-09

Family

ID=14902690

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12513477A Granted JPS5459108A (en) 1977-10-20 1977-10-20 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5459108A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56111108A (en) * 1980-02-07 1981-09-02 Matsushita Electric Ind Co Ltd Magnetic recording and reproducing device
JPS5746310A (en) * 1980-09-04 1982-03-16 Seiko Epson Corp Vertical magnetization recording system
JPS5898805A (en) * 1981-12-07 1983-06-11 Akai Electric Co Ltd Magnetic recording system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5319805A (en) * 1976-08-09 1978-02-23 Hitachi Ltd Automatic focusing optical device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5319805A (en) * 1976-08-09 1978-02-23 Hitachi Ltd Automatic focusing optical device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56111108A (en) * 1980-02-07 1981-09-02 Matsushita Electric Ind Co Ltd Magnetic recording and reproducing device
JPS6362801B2 (en) * 1980-02-07 1988-12-05
JPS5746310A (en) * 1980-09-04 1982-03-16 Seiko Epson Corp Vertical magnetization recording system
JPS5898805A (en) * 1981-12-07 1983-06-11 Akai Electric Co Ltd Magnetic recording system

Also Published As

Publication number Publication date
JPS571047B2 (en) 1982-01-09

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