GB2392299A - Perpendicular magnetic recording head with soft underlayer biasing - Google Patents

Perpendicular magnetic recording head with soft underlayer biasing Download PDF

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Publication number
GB2392299A
GB2392299A GB0324786A GB0324786A GB2392299A GB 2392299 A GB2392299 A GB 2392299A GB 0324786 A GB0324786 A GB 0324786A GB 0324786 A GB0324786 A GB 0324786A GB 2392299 A GB2392299 A GB 2392299A
Authority
GB
United Kingdom
Prior art keywords
recording head
biasing
magnetic field
magnetic recording
perpendicular 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.)
Granted
Application number
GB0324786A
Other versions
GB0324786D0 (en
GB2392299B (en
Inventor
Michael A Seigler
Dieter K Weller
Robert E Rottmayer
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.)
Seagate Technology LLC
Original Assignee
Seagate Technology LLC
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 Seagate Technology LLC filed Critical Seagate Technology LLC
Publication of GB0324786D0 publication Critical patent/GB0324786D0/en
Publication of GB2392299A publication Critical patent/GB2392299A/en
Application granted granted Critical
Publication of GB2392299B publication Critical patent/GB2392299B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • 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
    • G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
    • 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
    • G11B5/027—Analogue recording
    • G11B5/03—Biasing
    • 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
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure
    • 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
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure
    • G11B2005/0013—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation
    • G11B2005/0016—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation of magnetoresistive transducers
    • 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

Abstract

A perpendicular magnetic recording head 22 includes a read head having means for generating a magnetic field which reduces noise from a soft magnetic underlayer 40 of a recording medium 16 during operation of the recording head 22. The means for generating a magnetic field includes a current perpendicular to the plane read sensor 46 of the read head 34. The electrical current generates a magnetic field which biases the magnetization of the soft magnetic underlayer 40. By controlling the amount of current or current density that is passed through the read sensor 46, the magnitude of the magnetic field for biasing the soft magnetic underlayer 40 may be controlled. A method of using a perpendicular magnetic recording head 22 to magnetically bias a soft magnetic underlayer 40 of a recording medium 16 is also disclosed.

Description

GB 2392299 A continuation (74) Agent and/or Address for Service: Miller
Sturt Kenyon 9 John Street, LONDON, WC1N 2ES, United Kingdom
GB0324786A 2001-04-04 2002-03-28 Perpendicular magnetic recording head with soft underlayer biasing Expired - Fee Related GB2392299B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US28143001P 2001-04-04 2001-04-04
PCT/US2002/009958 WO2002082431A2 (en) 2001-04-04 2002-03-28 Perpendicular magnetic recording head with soft underlayer biasing

Publications (3)

Publication Number Publication Date
GB0324786D0 GB0324786D0 (en) 2003-11-26
GB2392299A true GB2392299A (en) 2004-02-25
GB2392299B GB2392299B (en) 2005-04-27

Family

ID=23077258

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0324786A Expired - Fee Related GB2392299B (en) 2001-04-04 2002-03-28 Perpendicular magnetic recording head with soft underlayer biasing

Country Status (6)

Country Link
JP (1) JP2005509990A (en)
KR (1) KR20040052495A (en)
CN (1) CN1511314A (en)
AU (1) AU2002250478A1 (en)
GB (1) GB2392299B (en)
WO (1) WO2002082431A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9318131B2 (en) * 2013-06-28 2016-04-19 Seagate Technology Llc Write gap structure for a magnetic recording head

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5486967A (en) * 1993-03-15 1996-01-23 Kabushiki Kaisha Toshiba Magnetic disk memory system
US5636093A (en) * 1994-10-05 1997-06-03 U.S. Philips Corporation Magnetic multilayer device having resonant-tunneling double-barrier structure
US5695864A (en) * 1995-09-28 1997-12-09 International Business Machines Corporation Electronic device using magnetic components
US5815342A (en) * 1992-07-13 1998-09-29 Kabushiki Kaisha Toshiba Perpendicular magnetic recording/reproducing apparatus
US6188549B1 (en) * 1997-12-10 2001-02-13 Read-Rite Corporation Magnetoresistive read/write head with high-performance gap layers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5815342A (en) * 1992-07-13 1998-09-29 Kabushiki Kaisha Toshiba Perpendicular magnetic recording/reproducing apparatus
US5486967A (en) * 1993-03-15 1996-01-23 Kabushiki Kaisha Toshiba Magnetic disk memory system
US5636093A (en) * 1994-10-05 1997-06-03 U.S. Philips Corporation Magnetic multilayer device having resonant-tunneling double-barrier structure
US5695864A (en) * 1995-09-28 1997-12-09 International Business Machines Corporation Electronic device using magnetic components
US6188549B1 (en) * 1997-12-10 2001-02-13 Read-Rite Corporation Magnetoresistive read/write head with high-performance gap layers

Also Published As

Publication number Publication date
KR20040052495A (en) 2004-06-23
JP2005509990A (en) 2005-04-14
GB0324786D0 (en) 2003-11-26
AU2002250478A1 (en) 2002-10-21
WO2002082431A2 (en) 2002-10-17
WO2002082431A3 (en) 2002-12-19
GB2392299B (en) 2005-04-27
CN1511314A (en) 2004-07-07

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20070328