JPS5597019A - Amorphous alloy magnetic head for video use - Google Patents

Amorphous alloy magnetic head for video use

Info

Publication number
JPS5597019A
JPS5597019A JP134979A JP134979A JPS5597019A JP S5597019 A JPS5597019 A JP S5597019A JP 134979 A JP134979 A JP 134979A JP 134979 A JP134979 A JP 134979A JP S5597019 A JPS5597019 A JP S5597019A
Authority
JP
Japan
Prior art keywords
magnetic
distortion
thermal treatment
temperature
amorphous alloy
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
JP134979A
Other languages
Japanese (ja)
Inventor
Kazuo Shiiki
Takehiko Watanabe
Moichi Otomo
Takayuki Kumasaka
Sanehiro Kudo
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.)
Hitachi Ltd
Proterial Ltd
Original Assignee
Hitachi Ltd
Hitachi Metals 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 Hitachi Ltd, Hitachi Metals Ltd filed Critical Hitachi Ltd
Priority to JP134979A priority Critical patent/JPS5597019A/en
Publication of JPS5597019A publication Critical patent/JPS5597019A/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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/147—Structure or manufacture of heads, e.g. inductive with cores being composed of metal sheets, i.e. laminated cores with cores composed of isolated magnetic layers, e.g. sheets

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

PURPOSE:To increase the permeability for the head obtained as well as eliminate the aging by using the amorphous alloy featuring the specific composition containing Fe, Co, Cr, B and the like along with the high saturation magnetic flux density and the low magnetic distortion to the magnetic path after elimination of the distortion through the thermal treatment. CONSTITUTION:The thermal treatment is applied to the amorphous alloy featuring the composition shwon by Eq. I (where X means C, Si, P, Ni, etc., x equals to 0.03-0.13, z is 0.70-0.85, w is 0.015-0.035, and y+z+w<=1 respectively) along with the saturation magnetic flux density of 5kG or more plus the magnetic distortion of -5X10<-6>-5X10<-6> and in the time range within which no crystallization occurs within the temperature range from the crystallization temperature to the level lower by 150 deg.C than the crystallization temperatue. In that case, the normal thermal treatment is given when the thermal treatment temperature is higher than the Curie temperature of the alloy; while the thermal treatment in the magnetic field is given in case the treatment temperature is lower than the Curie temperature respectively. Thus the magnetic distortion can be eliminated. The part or whole of the magnetic part is formed with the material with its distortion eliminated, and thus the magnetic head is obtained for application at the video band of frequency 200kHz or higher.
JP134979A 1979-01-12 1979-01-12 Amorphous alloy magnetic head for video use Pending JPS5597019A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP134979A JPS5597019A (en) 1979-01-12 1979-01-12 Amorphous alloy magnetic head for video use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP134979A JPS5597019A (en) 1979-01-12 1979-01-12 Amorphous alloy magnetic head for video use

Publications (1)

Publication Number Publication Date
JPS5597019A true JPS5597019A (en) 1980-07-23

Family

ID=11499003

Family Applications (1)

Application Number Title Priority Date Filing Date
JP134979A Pending JPS5597019A (en) 1979-01-12 1979-01-12 Amorphous alloy magnetic head for video use

Country Status (1)

Country Link
JP (1) JPS5597019A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0072574A2 (en) * 1981-08-18 1983-02-23 Kabushiki Kaisha Toshiba Amorphous alloy for magnetic core material
US4782994A (en) * 1987-07-24 1988-11-08 Electric Power Research Institute, Inc. Method and apparatus for continuous in-line annealing of amorphous strip

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53104897A (en) * 1977-02-25 1978-09-12 Toshiba Corp Magnetic head

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53104897A (en) * 1977-02-25 1978-09-12 Toshiba Corp Magnetic head

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0072574A2 (en) * 1981-08-18 1983-02-23 Kabushiki Kaisha Toshiba Amorphous alloy for magnetic core material
US4782994A (en) * 1987-07-24 1988-11-08 Electric Power Research Institute, Inc. Method and apparatus for continuous in-line annealing of amorphous strip
WO1990003244A1 (en) * 1987-07-24 1990-04-05 Allied-Signal Inc. Method and apparatus for continuous in-line annealing of amorphous strip

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