SG112075A1 - Method for magnetic recording on patterned multilevel perpendicular media using thermal assistance and fixed write current - Google Patents

Method for magnetic recording on patterned multilevel perpendicular media using thermal assistance and fixed write current

Info

Publication number
SG112075A1
SG112075A1 SG200407010A SG200407010A SG112075A1 SG 112075 A1 SG112075 A1 SG 112075A1 SG 200407010 A SG200407010 A SG 200407010A SG 200407010 A SG200407010 A SG 200407010A SG 112075 A1 SG112075 A1 SG 112075A1
Authority
SG
Singapore
Prior art keywords
magnetic
cell
island
magnetic recording
write current
Prior art date
Application number
SG200407010A
Other languages
English (en)
Inventor
Albrecht Manfred
Hellwig Olav
Hu Guohan
David Terris Bruce
Original Assignee
Hitachi Global Storage Tech
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 Global Storage Tech filed Critical Hitachi Global Storage Tech
Publication of SG112075A1 publication Critical patent/SG112075A1/en

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
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
    • 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
    • G11B5/09—Digital recording
    • 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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/676—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer
    • 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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/743—Patterned record carriers, wherein the magnetic recording layer is patterned into magnetic isolated data islands, e.g. discrete tracks
    • 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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/855—Coating only part of a support with a magnetic layer
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • 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
    • G11B2005/0021—Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Magnetic Record Carriers (AREA)
  • Magnetic Heads (AREA)
  • Thin Magnetic Films (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
SG200407010A 2003-12-03 2004-12-02 Method for magnetic recording on patterned multilevel perpendicular media using thermal assistance and fixed write current SG112075A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/728,231 US6865044B1 (en) 2003-12-03 2003-12-03 Method for magnetic recording on patterned multilevel perpendicular media using thermal assistance and fixed write current

Publications (1)

Publication Number Publication Date
SG112075A1 true SG112075A1 (en) 2005-06-29

Family

ID=34218215

Family Applications (1)

Application Number Title Priority Date Filing Date
SG200407010A SG112075A1 (en) 2003-12-03 2004-12-02 Method for magnetic recording on patterned multilevel perpendicular media using thermal assistance and fixed write current

Country Status (7)

Country Link
US (1) US6865044B1 (fr)
EP (1) EP1538604A3 (fr)
JP (1) JP2005166240A (fr)
KR (1) KR20050053490A (fr)
CN (2) CN1624769A (fr)
SG (1) SG112075A1 (fr)
TW (1) TW200521995A (fr)

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JP4317503B2 (ja) * 2004-08-25 2009-08-19 株式会社日立製作所 磁化情報記録方法及び磁気記録再生装置
US7713591B2 (en) * 2005-08-22 2010-05-11 Hitachi Global Storage Technologies Netherlands B.V. Longitudinal patterned media with circumferential anisotropy for ultra-high density magnetic recording
US8437104B2 (en) 2006-04-06 2013-05-07 Sigma Pro Ltd. Llc Read/write apparatus and method for a magnetic storage medium comprised of magnetic nanoparticles contained within nanotubes
US7687160B2 (en) 2006-04-06 2010-03-30 Winarski Tyson Y Magnetic storage medium formed of carbon nanotube arrays
US8673466B2 (en) * 2006-09-25 2014-03-18 Seagate Technology Llc CoPtCr-based bit patterned magnetic media
US20080085424A1 (en) * 2006-10-10 2008-04-10 Seagate Technology Llc Single-pass recording of multilevel patterned media
US8054666B2 (en) 2006-12-22 2011-11-08 Samsung Electronics Co., Ltd. Information storage devices using magnetic domain wall movement and methods of manufacturing the same
US7800865B2 (en) 2007-01-23 2010-09-21 Seagate Technology Llc Disc drive head actuator
US7957091B2 (en) 2007-01-23 2011-06-07 Seagate Technology Llc Recordable disc with fluid bearing features
US7835110B2 (en) 2007-01-23 2010-11-16 Seagate Technology MEMS disc drive
US7965589B2 (en) 2007-01-23 2011-06-21 Seagate Technology Llc Recordable disc and motor
KR101390950B1 (ko) * 2007-11-23 2014-05-02 시게이트 테크놀로지 엘엘씨 자기 기록 미디어 및 그 제조방법
FR2924261A1 (fr) * 2007-11-26 2009-05-29 Commissariat Energie Atomique Support d'enregistrement magnetique
US8719960B2 (en) * 2008-01-31 2014-05-06 The Board Of Trustees Of The University Of Illinois Temperature-dependent nanoscale contact potential measurement technique and device
WO2009119829A1 (fr) * 2008-03-28 2009-10-01 昭和電工株式会社 Support d’enregistrement magnétique vertical, procédé de fabrication de support d’enregistrement vertical et dispositif d’enregistrement/reproduction magnétique
US8931950B2 (en) 2008-08-20 2015-01-13 The Board Of Trustees Of The University Of Illinois Device for calorimetric measurement
US8107194B2 (en) * 2008-09-24 2012-01-31 International Business Machines Corporation Writing and reading multi-layer continuous magnetic recording media
US7911739B2 (en) * 2008-09-25 2011-03-22 International Business Machines Corporation Writing and reading multi-level patterned magnetic recording media
US20100189886A1 (en) * 2009-01-27 2010-07-29 Seagate Technology Llc Method For Making Data Storage Media
US7961417B2 (en) * 2009-02-17 2011-06-14 Seagate Technology Llc Heat assisted magnetic recording apparatus having a plurality of near-field transducers in a recording media
US8449730B2 (en) 2009-07-20 2013-05-28 Carnegie Mellon University Buffer layers for L10 thin film perpendicular media
US8387443B2 (en) * 2009-09-11 2013-03-05 The Board Of Trustees Of The University Of Illinois Microcantilever with reduced second harmonic while in contact with a surface and nano scale infrared spectrometer
US8031425B2 (en) * 2009-11-10 2011-10-04 International Business Machines Corporation Writing and reading multi-layer continuous magnetic recording media, with more than two recording layers
US8085502B2 (en) * 2009-11-10 2011-12-27 International Business Machines Corporation Writing and reading multi-level patterned magnetic recording media, with more than two recording levels
US8081542B1 (en) 2010-11-09 2011-12-20 Hitachi Global Technologies Netherlands B.V. Thermally-assisted recording (TAR) disk drive with patterned multilevel media and laser with power modulation
US8320232B1 (en) * 2011-07-21 2012-11-27 Hitachi Global Storage Technologies Netherlands B.V. Patterned perpendicular magnetic recording medium with multiple magnetic layers and interlayers
US8533861B2 (en) 2011-08-15 2013-09-10 The Board Of Trustees Of The University Of Illinois Magnetic actuation and thermal cantilevers for temperature and frequency dependent atomic force microscopy
US8914911B2 (en) 2011-08-15 2014-12-16 The Board Of Trustees Of The University Of Illinois Magnetic actuation and thermal cantilevers for temperature and frequency dependent atomic force microscopy
JP6076214B2 (ja) * 2013-07-09 2017-02-08 昭和電工株式会社 磁気記録媒体、磁気記録再生装置、磁気記録方法及び磁気再生方法
US9818440B1 (en) 2016-06-27 2017-11-14 Western Digital Technologies, Inc. Heat assisted magnetic recording system having at least three possible magnetic configurations per physical bit
CN108806728A (zh) * 2018-05-24 2018-11-13 联想(北京)有限公司 存储介质及其制造工艺
US11495249B1 (en) 2021-04-12 2022-11-08 Seagate Technology Llc Method and apparatus for magnetically recording data with three or more states per unit of data

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Also Published As

Publication number Publication date
CN101281752A (zh) 2008-10-08
KR20050053490A (ko) 2005-06-08
JP2005166240A (ja) 2005-06-23
CN1624769A (zh) 2005-06-08
EP1538604A3 (fr) 2006-02-01
TW200521995A (en) 2005-07-01
US6865044B1 (en) 2005-03-08
EP1538604A2 (fr) 2005-06-08

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