JPS57123504A - Magnetic recording and reproducing system - Google Patents

Magnetic recording and reproducing system

Info

Publication number
JPS57123504A
JPS57123504A JP719981A JP719981A JPS57123504A JP S57123504 A JPS57123504 A JP S57123504A JP 719981 A JP719981 A JP 719981A JP 719981 A JP719981 A JP 719981A JP S57123504 A JPS57123504 A JP S57123504A
Authority
JP
Japan
Prior art keywords
magnetic
frequency
signal
resonance
variation
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
JP719981A
Other languages
Japanese (ja)
Inventor
Kenichi Sawazaki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP719981A priority Critical patent/JPS57123504A/en
Publication of JPS57123504A publication Critical patent/JPS57123504A/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

Abstract

PURPOSE:To achieve high-density recording and reproduction by magnetically recording a signal on a magnetic recording medium which varies in high-frequency magnetic conductivity mu or loss with a magnetic field, and performing reproduction by using a resonance curcuit while utilizing variation in mu or loss. CONSTITUTION:On a magnetic material which varies in high-frequency magnetic conductivity mu with a magnetic field, such as a magnetic recording medium 1 containing YIG (yttrium iron garnet), etc., a signal is recorded by a vertical magnetization type magnetic head consisting of a main magnetic pole 2 and an auxiliary magneic pole 3. A reproducing head 5 has a high-frequency resonance circuit 8 consisting of a coil 6 and a capacitor 7, and this resonance circuit 8 is supplied with a high-frequency signal from a high-frequency oscillation circuit 9. The signal recorded on the recording medium 1 in the form of variation in mu is detected by a detecting circuit 10 by variation in resonance frequency. Thus, high-density recording and reproduction are achieved.
JP719981A 1981-01-22 1981-01-22 Magnetic recording and reproducing system Pending JPS57123504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP719981A JPS57123504A (en) 1981-01-22 1981-01-22 Magnetic recording and reproducing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP719981A JPS57123504A (en) 1981-01-22 1981-01-22 Magnetic recording and reproducing system

Publications (1)

Publication Number Publication Date
JPS57123504A true JPS57123504A (en) 1982-08-02

Family

ID=11659356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP719981A Pending JPS57123504A (en) 1981-01-22 1981-01-22 Magnetic recording and reproducing system

Country Status (1)

Country Link
JP (1) JPS57123504A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0099127A2 (en) * 1982-07-16 1984-01-25 Kabushiki Kaisha Toshiba Magnetic reproducing system
EP0132852A2 (en) * 1983-07-27 1985-02-13 Kabushiki Kaisha Toshiba Magnetic reproducing apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5433041A (en) * 1977-08-18 1979-03-10 Fuji Photo Film Co Ltd Thermal magnetic recording method
JPS5567909A (en) * 1978-11-11 1980-05-22 Emi Ltd Magnetic reading device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5433041A (en) * 1977-08-18 1979-03-10 Fuji Photo Film Co Ltd Thermal magnetic recording method
JPS5567909A (en) * 1978-11-11 1980-05-22 Emi Ltd Magnetic reading device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0099127A2 (en) * 1982-07-16 1984-01-25 Kabushiki Kaisha Toshiba Magnetic reproducing system
EP0105531A2 (en) * 1982-07-16 1984-04-18 Kabushiki Kaisha Toshiba Magnetic reproducing system
EP0132852A2 (en) * 1983-07-27 1985-02-13 Kabushiki Kaisha Toshiba Magnetic reproducing apparatus
JPS6028004A (en) * 1983-07-27 1985-02-13 Toshiba Corp Magnetic recording and reproducing device

Similar Documents

Publication Publication Date Title
US4535369A (en) Magnetic recording and reproducing apparatus
EP0301823A3 (en) Three-pole magnetic recording head
US4677512A (en) Magnetic reproducing apparatus
JPH0323962B2 (en)
JPS54119220A (en) Magnetic head
US2549771A (en) Magnetic transducer head
US2411849A (en) Magnetic recorder head
JPS57123504A (en) Magnetic recording and reproducing system
JPS57109134A (en) Magnetic transferring and recording method
JPS54128719A (en) Vertical magnetization recorder
JPS57120233A (en) Magnetic transfer recording system
JPS567243A (en) Magnetic transfer recording system
JPS5580818A (en) Vertical magnetic recording head
JPS5584015A (en) Vertical magnetization recorder
JPS558640A (en) Magnetic recording and reproducing system
Morrison et al. The magnetic transfer process
US3438018A (en) Apparatus and method for magnetic recording
JPS55146632A (en) Magnetic recording medium and magnetic recording and reproducing method
JPS57205811A (en) Vertical magnetization type magnetic head
JPS57130221A (en) Vertical magnetization recording and reproducing head
JPS6460804A (en) Magnetic head for magnetic recording
JPS55139624A (en) Vertical magnetization type magnetic head
JPS53101411A (en) Mr type magnetic head
JPS55139626A (en) Compound magnetic head
JPS551611A (en) Megnetic recording and reproducing device