JPS5625245A - Magnetic recording medium and magnetic recording and reproducing system - Google Patents

Magnetic recording medium and magnetic recording and reproducing system

Info

Publication number
JPS5625245A
JPS5625245A JP10187679A JP10187679A JPS5625245A JP S5625245 A JPS5625245 A JP S5625245A JP 10187679 A JP10187679 A JP 10187679A JP 10187679 A JP10187679 A JP 10187679A JP S5625245 A JPS5625245 A JP S5625245A
Authority
JP
Japan
Prior art keywords
magnetic
layer
light
magnetic recording
magnetic substance
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
JP10187679A
Other languages
Japanese (ja)
Inventor
Norio Miyatake
Yoshiji Nakagawa
Ryuji Sugita
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 JP10187679A priority Critical patent/JPS5625245A/en
Publication of JPS5625245A publication Critical patent/JPS5625245A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To attain reproduction high purity easily by making optical reproduction possible by stacking a layer large in magnetooptical effect and a magnetic substance layer.
CONSTITUTION: On supporter 20 made of a polymer material or nonmagnetic metal, metal, magnetic substanc layer 21 made of a high-magnetic-permeability material such as iron is formed. On the surface of this magnetic substance layer 21, magnetic substance layer 22 of vertical anisopropy made of CoCr, etc., with an easy-to- magnetize axis in the vertical direction is formed and magnetic substance layer 23 of Fe, etc., with large Kerr effect is formed. Residual magnetism is generated by applying the film surface of this recording medium with magnetic field 40 and laser light is focused to perform write operation at the Curie point. In reproduction, light 31 is caused to strike magnetic layer 23 by way of polarizer 32 and lens system 33. Its reflected light 34 is focused through lens system 35 and through analyzer 36, photodetector 37 detects the light. Consequently, an output that corresponds to the direction of magnetism in magnetic layer 23 can be obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP10187679A 1979-08-09 1979-08-09 Magnetic recording medium and magnetic recording and reproducing system Pending JPS5625245A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10187679A JPS5625245A (en) 1979-08-09 1979-08-09 Magnetic recording medium and magnetic recording and reproducing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10187679A JPS5625245A (en) 1979-08-09 1979-08-09 Magnetic recording medium and magnetic recording and reproducing system

Publications (1)

Publication Number Publication Date
JPS5625245A true JPS5625245A (en) 1981-03-11

Family

ID=14312161

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10187679A Pending JPS5625245A (en) 1979-08-09 1979-08-09 Magnetic recording medium and magnetic recording and reproducing system

Country Status (1)

Country Link
JP (1) JPS5625245A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093618A (en) * 1983-10-27 1985-05-25 Teruo Fujii Plate magnetic recording body and detection of signal inputting condition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093618A (en) * 1983-10-27 1985-05-25 Teruo Fujii Plate magnetic recording body and detection of signal inputting condition

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