GB1512690A - Magnetic remanence measurement - Google Patents

Magnetic remanence measurement

Info

Publication number
GB1512690A
GB1512690A GB39494/75A GB3949475A GB1512690A GB 1512690 A GB1512690 A GB 1512690A GB 39494/75 A GB39494/75 A GB 39494/75A GB 3949475 A GB3949475 A GB 3949475A GB 1512690 A GB1512690 A GB 1512690A
Authority
GB
United Kingdom
Prior art keywords
disc
heads
wavelength
recorded
magnetic
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.)
Expired
Application number
GB39494/75A
Other languages
English (en)
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.)
BASF SE
Original Assignee
BASF SE
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
Priority claimed from DE19742446488 external-priority patent/DE2446488C3/de
Application filed by BASF SE filed Critical BASF SE
Publication of GB1512690A publication Critical patent/GB1512690A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
    • G01R33/1207—Testing individual magnetic storage devices, e.g. records carriers or digital storage elements

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Measuring Magnetic Variables (AREA)
GB39494/75A 1974-09-28 1975-09-26 Magnetic remanence measurement Expired GB1512690A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742446488 DE2446488C3 (de) 1974-09-28 Anordnung zur zerstörungsfreien Messung der remanenten Magnetflußdichte von Magnetaufzeichnungsträgern, insbesondere von Magnetplatten

Publications (1)

Publication Number Publication Date
GB1512690A true GB1512690A (en) 1978-06-01

Family

ID=5927043

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39494/75A Expired GB1512690A (en) 1974-09-28 1975-09-26 Magnetic remanence measurement

Country Status (4)

Country Link
US (1) US3984763A (enExample)
JP (1) JPS5814616B2 (enExample)
FR (1) FR2286388A1 (enExample)
GB (1) GB1512690A (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227320A (en) * 1988-12-21 1990-07-25 Inst Prikladnoi Fiziki Akademi Apparatus for measuring parameters of moving ferromagnetic articles
GB2268272A (en) * 1992-06-29 1994-01-05 Orb Electrical Steels Ltd Detecting regions of fine grain in grain oriented silicon steel

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS578622U (enExample) * 1980-02-28 1982-01-16
JPS5888675A (ja) * 1981-11-24 1983-05-26 Hitachi Ltd 磁気デイスク媒体のテスト方法
US4485451A (en) * 1982-01-28 1984-11-27 Obedineni Zavodi Za Zapametyavashti Ustroystva System for monitoring dynamic parameters of magnetic heads
US4863039A (en) * 1983-12-23 1989-09-05 Three Phoenix Company Apparatus and method for handling a flexible disk for testing
GB8504765D0 (en) * 1985-02-25 1985-03-27 Gardner J P Magnetic recordings
US4627288A (en) * 1985-08-12 1986-12-09 Guzik Technical Enterprises Bearing unloading mechanism for disc clamping unit
ATE100942T1 (de) * 1987-07-02 1994-02-15 Seagate Technology Unschaedliches verfahren fuer die magnetische messung von aufzeichnungsplatten.
US5093751A (en) * 1990-03-21 1992-03-03 Hitachi Electronics Engineering Co., Ltd. Carry noise measuring system for magnetic recording medium
JPH04137511U (ja) * 1991-06-18 1992-12-22 セイコー精機株式会社 ハードデイスク検査装置
US6330122B1 (en) 1999-05-24 2001-12-11 International Business Machines Corporation Magnetic tester for disk surface scan
US8559122B2 (en) * 2006-12-22 2013-10-15 HGST Netherlands B.V. Integrated spiral certification head for media magnetic testing including PMR and LMR media

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922106A (en) * 1956-08-01 1960-01-19 Texas Instruments Inc Method and apparatus for testing a record element

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227320A (en) * 1988-12-21 1990-07-25 Inst Prikladnoi Fiziki Akademi Apparatus for measuring parameters of moving ferromagnetic articles
GB2268272A (en) * 1992-06-29 1994-01-05 Orb Electrical Steels Ltd Detecting regions of fine grain in grain oriented silicon steel
GB2268272B (en) * 1992-06-29 1995-09-20 Orb Electrical Steels Ltd Monitoring apparatus and method

Also Published As

Publication number Publication date
JPS5814616B2 (ja) 1983-03-19
DE2446488B2 (de) 1977-04-14
JPS5154404A (en) 1976-05-13
DE2446488A1 (de) 1976-04-08
FR2286388B3 (enExample) 1978-05-12
US3984763A (en) 1976-10-05
FR2286388A1 (fr) 1976-04-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee