JPS6479930A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS6479930A
JPS6479930A JP23654587A JP23654587A JPS6479930A JP S6479930 A JPS6479930 A JP S6479930A JP 23654587 A JP23654587 A JP 23654587A JP 23654587 A JP23654587 A JP 23654587A JP S6479930 A JPS6479930 A JP S6479930A
Authority
JP
Japan
Prior art keywords
layer
magnetic
magnetized film
film
powder
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
JP23654587A
Other languages
Japanese (ja)
Inventor
Masaki Aoki
Hideaki Komoda
Hideo Torii
Nobuyuki Aoki
Keiichi Ochiai
Ikuo Ota
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 JP23654587A priority Critical patent/JPS6479930A/en
Publication of JPS6479930A publication Critical patent/JPS6479930A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To obtain high reproduced output over the entire frequency range by forming a magnetic layer into a two-layered structure and respectively selecting the coercive force Hc, residual magnetic flux density Br, film thickness, planar ratio of powder, etc., of the two layers. CONSTITUTION:The magnetic layers 12 and 13 are successively coated on the surface of a substrate 11. The layer 12 is formed as the intra-surface magnetized film having 350-700 oersted coercive force Hc and 700-1,500 gauss residual magnetic flux density Br and the layer 13 is formed as the perpendicular magnetized film having 0.5-1.5mum film thickness, 300-700 oersted Hc and 500-1,000 gauss Br. The intra-surface magnetized film of the layer 12 is constituted of acicular magnetic powder of a gamma-Fe2O3 system and the perpendicular magnetized film of the layer 13 is constituted of planar magnetic powder of hexagonal ferrite.
JP23654587A 1987-09-21 1987-09-21 Magnetic recording medium Pending JPS6479930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23654587A JPS6479930A (en) 1987-09-21 1987-09-21 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23654587A JPS6479930A (en) 1987-09-21 1987-09-21 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS6479930A true JPS6479930A (en) 1989-03-24

Family

ID=17002253

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23654587A Pending JPS6479930A (en) 1987-09-21 1987-09-21 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS6479930A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03286420A (en) * 1990-03-30 1991-12-17 Matsushita Electric Ind Co Ltd Magnetic recording medium
JPH0417123A (en) * 1990-05-10 1992-01-21 Toshiba Corp Contact transfer system for magnetic recording signal
JPH0419815A (en) * 1990-05-11 1992-01-23 Toshiba Corp Multi-frequency superposed magnetic recording system
JP2008011768A (en) * 2006-07-05 2008-01-24 Kubota Corp Pick-up structure of combine harvester

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03286420A (en) * 1990-03-30 1991-12-17 Matsushita Electric Ind Co Ltd Magnetic recording medium
JPH0417123A (en) * 1990-05-10 1992-01-21 Toshiba Corp Contact transfer system for magnetic recording signal
JPH0419815A (en) * 1990-05-11 1992-01-23 Toshiba Corp Multi-frequency superposed magnetic recording system
JP2008011768A (en) * 2006-07-05 2008-01-24 Kubota Corp Pick-up structure of combine harvester

Similar Documents

Publication Publication Date Title
JPS57154618A (en) Magnetic recording medium
EP0210855A3 (en) Magneto-optical recording media
EP0220597A3 (en) Thin film vertical magnetic recording medium with a substrate, an intermediate layer and a magnetisable layer
JPS54147010A (en) Magnetic recording medium
JPS6479930A (en) Magnetic recording medium
JPS5448504A (en) Magnetic recording medium
JPS5733435A (en) Magnetic recording medium
EP0168825A3 (en) Magnetic alloy thin film
JPS5360205A (en) Magnetic recording medium and its manufacture
JPS5360204A (en) Magnetic recording medium and its recording method
JPS5354002A (en) Magnetic recording medium
EP0077069A3 (en) Magnetic recording medium
JPS54141608A (en) Magnetic recording medium
JPS5323608A (en) Magnet ic recording medium
JPS56127930A (en) Magnetic recording medium
EP0384746A3 (en) Over write capable magnetooptical recording medium
JPS5769542A (en) Recording medium
JPS57198535A (en) Magnetic recording medium
JPS5339705A (en) Magnetic recording medium
JPS52106500A (en) Magnetic recording medium
JPS6450234A (en) Magnetic recording medium
JPS644908A (en) Multi-layered thin film magnetic head
JPS57183618A (en) Thin film magnetic head
JPS5794933A (en) Magnetic disk
JPS5693123A (en) Magnetic recording material