JPS55125509A - Magnetic recording method - Google Patents

Magnetic recording method

Info

Publication number
JPS55125509A
JPS55125509A JP3345979A JP3345979A JPS55125509A JP S55125509 A JPS55125509 A JP S55125509A JP 3345979 A JP3345979 A JP 3345979A JP 3345979 A JP3345979 A JP 3345979A JP S55125509 A JPS55125509 A JP S55125509A
Authority
JP
Japan
Prior art keywords
magnetic
pole
coil
magnetic field
bias
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
JP3345979A
Other languages
Japanese (ja)
Inventor
Masami Himuro
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP3345979A priority Critical patent/JPS55125509A/en
Publication of JPS55125509A publication Critical patent/JPS55125509A/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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • G11B11/10547—Heads for reproducing using optical beam of radiation interacting with the magnetisation of an intermediate transfer element, e.g. magnetic film, included in the head
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0026—Pulse recording
    • G11B2005/0029—Pulse recording using magnetisation components of the recording layer disposed mainly perpendicularly to the record carrier surface

Landscapes

  • Digital Magnetic Recording (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To elevate an information signal as PCM to that of high density, high quality and high S/N, by making the sum of a bias magnetic field and a fixed amount of signal magnetic field larger than the magnetic force of the recording medium. CONSTITUTION:A ring electromagnet 1 magnetizes in saturation a magnetic tape 1 to 1 polarity uniformly in the direction of thickness, when the magnetic poles 13a and 13b are N pole and S pole, respectively, the magnetic layer 1a of the tape 1 is magnetized in the direction of thickness, and its surface becomes N pole. Moreover, a bias coil 12 is arranged around the recording coil 11, and each coil of 11 and 12 is opposite to each other on the surface of the magnetic layer 1a. And a regular DC current always flows into the coil 12, and a pulse current is supplied to the coil 11 in accordance with the information signal. Each current value of the coils 11 and 12 is selected so that the sum Hb+Hsg of the bias magnetic field Hb provided to the magnetic layer 1a and a fixed amount of signal magnetic field Hsg can be larger than the magnetic force Hc of the magnetic layer 1a. And the information recording part becomes S pole, and a magnetic wall 15 is formed between S pole and N pole.
JP3345979A 1979-03-22 1979-03-22 Magnetic recording method Pending JPS55125509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3345979A JPS55125509A (en) 1979-03-22 1979-03-22 Magnetic recording method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3345979A JPS55125509A (en) 1979-03-22 1979-03-22 Magnetic recording method

Publications (1)

Publication Number Publication Date
JPS55125509A true JPS55125509A (en) 1980-09-27

Family

ID=12387115

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3345979A Pending JPS55125509A (en) 1979-03-22 1979-03-22 Magnetic recording method

Country Status (1)

Country Link
JP (1) JPS55125509A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58188309A (en) * 1982-04-28 1983-11-02 Tdk Corp Magnetic recording and writing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58188309A (en) * 1982-04-28 1983-11-02 Tdk Corp Magnetic recording and writing method

Similar Documents

Publication Publication Date Title
ATE36088T1 (en) THIN FILM MAGNETIC HEAD ON A NON-MAGNETIC SUBSTRATE FOR VERTICAL MAGNETIZATION.
JPS5724015A (en) Thin film magnetic head
JPS57164416A (en) Magnetic head
JPS57109134A (en) Magnetic transferring and recording method
JPS55125509A (en) Magnetic recording method
JPS56163517A (en) Vertical magnetization recording head
MY123711A (en) Method of recording magnetically on magnetic recording medium
JPS54128719A (en) Vertical magnetization recorder
JPS5584015A (en) Vertical magnetization recorder
JPS56127930A (en) Magnetic recording medium
JPS57135418A (en) Composite thin film head
JPS57179906A (en) Magnetic head
JPS57205811A (en) Vertical magnetization type magnetic head
JPS5687220A (en) Vertical magnetization type magnetic head
JPS5736435A (en) Vertical magnetizing medium
JPS57130221A (en) Vertical magnetization recording and reproducing head
JPS57117119A (en) Vertical magnetization recording head
JPS5736422A (en) Magnetic head
JPS551611A (en) Megnetic recording and reproducing device
JPS5737714A (en) Magnetic head for vertical magnetic recording and reproduction
SU593236A1 (en) Digital information magnetic recording method
JPS5718010A (en) Magnetic recording and reproducing system
JPS5782227A (en) Magnetic recording medium
JPS5641519A (en) Magnetic head
JPS5687216A (en) Multitrack vertical magnetization type magnetic head