JP4710087B2 - 熱アシスト磁気記録用の積層型交換結合付着(leca)媒体 - Google Patents
熱アシスト磁気記録用の積層型交換結合付着(leca)媒体 Download PDFInfo
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- JP4710087B2 JP4710087B2 JP2008203942A JP2008203942A JP4710087B2 JP 4710087 B2 JP4710087 B2 JP 4710087B2 JP 2008203942 A JP2008203942 A JP 2008203942A JP 2008203942 A JP2008203942 A JP 2008203942A JP 4710087 B2 JP4710087 B2 JP 4710087B2
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- 229910005335 FePt Inorganic materials 0.000 claims description 6
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- 229910052796 boron Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
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- 229910052737 gold Inorganic materials 0.000 claims description 3
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- 229910052727 yttrium Inorganic materials 0.000 claims 1
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Images
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
- G11B5/3109—Details
- G11B5/313—Disposition of layers
- G11B5/3133—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure
- G11B5/314—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure where the layers are extra layers normally not provided in the transducing structure, e.g. optical layers
-
- 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
- G11B2005/0021—Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal
-
- 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
Description
Claims (19)
- 互いに隣接して配置された複数の2層構造体を含む装置において、各2層構造体が、第1のキュリー温度及び第1の磁気異方性を有する磁性材料でできた第1の層、及び前記第1の層に隣接して配置された磁性材料でできた第2の層を含み、前記第2の層が、前記第1のキュリー温度よりも低い第2のキュリー温度及び前記第1の磁気異方性よりも小さい第2の磁気異方性を有し、前記2層構造体が前記第2のキュリー温度よりも高く前記第1のキュリー温度よりも低い温度に加熱されると、前記第1の層の磁性粒子が超常磁性になる、装置。
- 前記第1の層と前記第2の層との間に配置された交換結合制御層をさらに含む請求項1に記載された装置。
- 前記交換結合制御層が0nmよりも大きく5nmよりも小さい厚さを有する請求項2に記載された装置。
- 前記第1の層の磁性粒子が1nm〜10nmの直径を有し、前記第2の層の磁性粒子が1nm〜1000nmの直径を有する請求項1に記載された装置。
- 前記第1の層が2nm〜30nmの厚さを有し、前記第2の層が0.5nm〜30nmの厚さを有する請求項1に記載された装置。
- 前記各2層構造体の磁性材料でできた前記第1の層が、複層構造体を含む請求項1に記載された装置。
- 前記各2層構造体の前記第1の層が、第1の粒子間交換結合を有する第1の複数の磁性材料粒子を含み、
前記各2層構造体の前記第2の層が、第2の粒子間交換結合を有する第2の複数の磁性材料粒子を含み、前記第2の粒子間交換結合が、前記第1の粒子間交換結合よりも大きい請求項1に記載された装置。 - 前記各2層構造体において、前記第1の層の磁性粒子が前記第2の層の磁性粒子よりも小さく、前記第1の層及び前記第2の層が互いに交換結合される請求項1に記載された装置。
- 前記各2層構造体において、前記第1の層が磁性粒子間に結合分離材料を含む請求項1に記載された装置。
- 前記結合分離材料が酸化物を含む請求項9に記載された装置。
- 基板と、
前記基板上に被着されるシード層とを更に含み、
前記複数の2層構造体のうちの1つの2層構造体の前記第1の層が前記シード層上に直接隣接して配置される請求項1に記載された装置。 - 前記第1の層が、Co3Pt、CoXPt合金、CoX/Pt多層体、CoXPd合金、CoX/Pd多層体、FePt、FeYPt合金又はTbFeCoの1つ又は複数を含み、ここで、Xは、Cr、B、Ni及びTaの1つ又は複数を含み、Yは、Cu、Ni、Co、B、Ag、Au及びMnの1つ又は複数を含む、請求項1に記載された装置。
- 磁性材料でできた第3の層の両側に配置された磁性材料でできた第1の層及び第2の層を含む装置において、前記第1の層及び前記第2の層が前記第3の層のキュリー温度よりも高いキュリー温度を有し、前記第1の層及び前記第2の層が前記第3の層よりも大きな磁気異方性を有し、前記第1の層、前記第2の層及び前記第3の層が、前記第3の層のキュリー温度よりも高く前記第1の層及び前記第2の層のキュリー温度よりも低い温度に加熱されると、前記第1の層及び前記第2の層の磁性粒子が超常磁性になる、装置。
- 前記第1の層と前記第3の層との間に配置された交換結合制御層をさらに含む請求項13に記載された装置。
- 前記交換結合制御層が0nmよりも大きく5nmよりも小さい厚さを有する請求項14に記載された装置。
- 前記第1の層及び前記第2の層の磁性粒子が1nm〜10nmの直径を有し、前記第3の層の磁性粒子が1nm〜1000nmの直径を有する請求項13に記載された装置。
- 磁性材料でできた第3の層の両側に配置された磁性材料でできた第1の層及び第2の層を含む装置において、前記第1の層及び前記第2の層が前記第3の層のキュリー温度よりも低いキュリー温度を有し、前記第1の層及び前記第2の層が前記第3の層よりも小さな磁気異方性を有し、前記第1の層、前記第2の層及び前記第3の層が、前記第1の層及び前記第2の層のキュリー温度よりも高く前記第3の層のキュリー温度よりも低い温度に加熱されると、前記第3の層の磁性粒子が超常磁性になる、装置。
- 前記第1の層と前記第3の層との間に配置された交換結合制御層をさらに含む請求項17に記載された装置。
- 前記交換結合制御層が0nmよりも大きく5nmよりも小さい厚さを有する請求項18に記載された装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/835,476 US8241766B2 (en) | 2006-01-20 | 2007-08-08 | Laminated exchange coupling adhesion (LECA) media for heat assisted magnetic recording |
US11/835,476 | 2007-08-08 |
Publications (2)
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JP2009059461A JP2009059461A (ja) | 2009-03-19 |
JP4710087B2 true JP4710087B2 (ja) | 2011-06-29 |
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JP2008203942A Expired - Fee Related JP4710087B2 (ja) | 2007-08-08 | 2008-08-07 | 熱アシスト磁気記録用の積層型交換結合付着(leca)媒体 |
Country Status (3)
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US (1) | US8241766B2 (ja) |
JP (1) | JP4710087B2 (ja) |
SG (1) | SG150469A1 (ja) |
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SG150469A1 (en) | 2009-03-30 |
US20090040644A1 (en) | 2009-02-12 |
US8241766B2 (en) | 2012-08-14 |
JP2009059461A (ja) | 2009-03-19 |
US20110235205A9 (en) | 2011-09-29 |
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