JP2008034087A - マルチフェロイック記録媒体を使用する電界アシスト書き込み - Google Patents
マルチフェロイック記録媒体を使用する電界アシスト書き込み Download PDFInfo
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- 230000005684 electric field Effects 0.000 title claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 69
- 238000013500 data storage Methods 0.000 claims abstract description 59
- 230000005291 magnetic effect Effects 0.000 claims abstract description 49
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000011159 matrix material Substances 0.000 claims description 27
- 239000002105 nanoparticle Substances 0.000 claims description 17
- 230000005415 magnetization Effects 0.000 claims description 12
- 230000005294 ferromagnetic effect Effects 0.000 claims description 11
- 230000005381 magnetic domain Effects 0.000 claims description 4
- 229910000531 Co alloy Inorganic materials 0.000 claims description 3
- 229910005335 FePt Inorganic materials 0.000 claims description 3
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 229910001004 magnetic alloy Inorganic materials 0.000 claims 2
- 239000002902 ferrimagnetic material Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 13
- 239000000758 substrate Substances 0.000 description 9
- 239000000696 magnetic material Substances 0.000 description 8
- 239000010408 film Substances 0.000 description 6
- 239000011810 insulating material Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 229910002906 BiFeO3–CoFe2O4 Inorganic materials 0.000 description 3
- 229910003321 CoFe Inorganic materials 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910004121 SrRuO Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000407 epitaxy Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002061 nanopillar Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000004549 pulsed laser deposition Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- 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
-
- 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
- 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
- G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
- G11B5/658—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing oxygen, e.g. molecular oxygen or magnetic oxide
-
- 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
- G11B5/82—Disk carriers
-
- 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
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Magnetic Record Carriers (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
【解決手段】装置は、圧電性材料及び強磁性材料を含むデータ記憶媒体と、データ記憶媒体の一部に電界を印加する電界源と、データ記憶媒体の当該一部に磁界を印加する書き込みポールとを備える。当該装置によって実行される方法も提供される。
【選択図】図1
Description
12 ハウジング
14 スピンドル・モータ
18 アーム
20 第1の端部
22 記録及び/又は読み取りヘッド
24 第2の端部
26 ベアリング
28 アクチュエータ・モータ
30 記録ヘッド
32 データ記憶媒体
34 エア・ベアリング
36 書き込みポール
38 リターン・ポール
40 ヨーク
42 コイル
44 磁束
46 電極
48 絶縁材料
50 電圧源
60 コイル
62 書き込みポール
64 媒体
66 記録層
68 記録ビット
70 記録ビット
72 記録ビット
74 絶縁材料の層
76 基板
90 データ記憶媒体
92 記録層
94 基板
96 強磁性材料のピラー
98 強磁性材料のピラー
100 圧電性材料のマトリックス
102 データ記憶媒体
104 記録層
106 基板
108 強磁性材料の層
110 圧電性材料の層
112 データ記憶媒体
114 記録層
116 基板
118 ピラー(又はアイランド)
120 ピラー(又はアイランド)
122 強誘電性でも強磁性でもない材料のマトリックス
124 強磁性材料の層
126 圧電性材料の層
130 データ記憶媒体
132 記録層
134 強磁性材料のナノ粒子
136 圧電性材料のマトリックス
140 書き込みポール
142 マルチフェロイック媒体
144 電極
146 電圧源
150 書き込みポール
152 マルチフェロイック媒体
154 電極
156 電極
158 電圧源
Claims (20)
- 圧電性材料及び強磁性材料を含むデータ記憶媒体と、
前記データ記憶媒体の一部に電界を印加する電界源と、
前記データ記憶媒体の前記一部に磁界を印加する磁界源と、を備える装置。 - 前記データ記憶媒体が、
前記圧電性材料の層に隣接する前記強磁性材料の層を備える、請求項1に記載の装置。 - 前記データ記憶媒体が、
前記圧電性材料のマトリックス内に前記強磁性材料の複数のアイランドを備える、請求項1に記載の装置。 - 前記データ記憶媒体が、
非強誘電性且つ非圧電性の材料のマトリックス内に複数のピラーを備え、前記ピラーの各々が、前記強磁性材料の層及び前記圧電性材料の層を含む、請求項1に記載の装置。 - 前記データ記憶媒体が、
前記圧電性材料のマトリックス内に複数の強磁性ナノ粒子を備え、又は強磁性材料のマトリックス内に複数の圧電性ナノ粒子を備える、請求項1に記載の装置。 - 前記データ記憶媒体が、
非強誘電性且つ非圧電性の材料のマトリックス内に複数のナノ粒子を備え、前記ナノ粒子の各々が、前記強磁性材料及び前記圧電性材料を含む、請求項1に記載の装置。 - 前記電界源が、
電極と、
前記電極と前記データ記憶媒体の間に接続される電圧源と、を備える、請求項1に記載の装置。 - 前記電界源が、
電極と、
前記電極と前記磁界源の間に接続される電圧源と、を備える、請求項1に記載の装置。 - 前記電界源が、
第1及び第2の電極と、
前記第1及び第2の電極の間に接続される電圧源と、を備える、請求項1に記載の装置。 - 前記強磁性材料が、磁気合金、0.30<x<0.33且つ1.8<y<2.2であるTbxDy1−xFey、NiFe2O4、FePt、Co3Pt、Co/Pt多層、又はCo合金のうちの1つを含み、
前記圧電性材料が、PZT(PbZrTiO3)、PT(PbTiO3)、PZ(PbZrO3)、PLZT(PbLa)(ZrTi)O3、Pb(Mg,Nb)O3、Pb(Zn,Nb)O3、又はPb(Sc,Nb)O3のうちの1つを含む、請求項1に記載の装置。 - 圧電性材料及び強磁性材料を含むデータ記憶媒体の一部に電界を印加するステップと、
前記マルチフェロイック・データ記憶媒体内の強磁性材料の磁区の磁化方向をスイッチするために、データ記憶媒体の前記一部に磁界を印加するステップと、を含む方法。 - 前記データ記憶媒体が、
前記圧電性材料の層に隣接する前記強磁性材料の層を備える、請求項11に記載の方法。 - 前記データ記憶媒体が、
前記圧電性材料のマトリックス内に前記強磁性材料の複数のアイランドを備える、請求項11に記載の方法。 - 前記データ記憶媒体が、
非強誘電性且つ非圧電性の材料のマトリックス内に複数のピラーを備え、前記ピラーの各々が、前記強磁性材料の層及び前記圧電性材料の層を含む、請求項11に記載の方法。 - 前記データ記憶媒体が、
前記圧電性材料のマトリックス内に複数の強磁性ナノ粒子を備え、又は強磁性材料のマトリックス内に複数の圧電性ナノ粒子を備える、請求項11に記載の方法。 - 前記データ記憶媒体が、
非強誘電性且つ非圧電性の材料のマトリックス内に複数のナノ粒子を備え、前記ナノ粒子の各々が、前記強磁性材料及び前記圧電性材料を含む、請求項11に記載の方法。 - 前記電界が、
電極と、
前記電極と前記データ記憶媒体の間に接続される電圧源と、を備える電界源を使用して印加される、請求項11に記載の方法。 - 前記電界が、
電極と、
前記電極と磁界源の間に接続される電圧源と、を備える電界源を使用して印加される、請求項11に記載の方法。 - 前記電界が、
第1及び第2の電極と、
前記第1及び第2の電極の間に接続される電圧源と、を備える電界源を使用して印加される、請求項11に記載の方法。 - 前記強磁性材料が、磁気合金、0.30<x<0.33且つ1.8<y<2.2であるTbxDy1−xFey、NiFe2O4、FePt、Co3Pt、Co/Pt多層、又はCo合金のうちの1つを含み、
前記圧電性材料が、PZT(PbZrTiO3)、PT(PbTiO3)、PZ(PbZrO3)、PLZT(PbLa)(ZrTi)O3、Pb(Mg,Nb)O3、Pb(Zn,Nb)O3、又はPb(Sc,Nb)O3のうちの1つを含む、請求項11に記載の方法。
Applications Claiming Priority (1)
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US11/492,337 US7706103B2 (en) | 2006-07-25 | 2006-07-25 | Electric field assisted writing using a multiferroic recording media |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4767346B2 (ja) * | 2007-10-12 | 2011-09-07 | 昭和電工株式会社 | 磁気記録媒体、磁気記録方法および磁気記録装置 |
US8374070B2 (en) | 2007-10-12 | 2013-02-12 | Showa Denko K.K. | Magnetic recording medium having piezoelectric material and apparatus for recording information data into such magnetic medium |
WO2013073371A1 (ja) | 2011-11-18 | 2013-05-23 | 国立大学法人秋田大学 | 電界書込み型磁気記録装置 |
US8891190B1 (en) | 2011-11-18 | 2014-11-18 | Akita University | Electric field writing magnetic storage device |
JP2015153447A (ja) * | 2014-02-18 | 2015-08-24 | 昭和電工株式会社 | 垂直磁気記録媒体、垂直磁気記録媒体の製造方法、垂直記録再生装置 |
JP2016085773A (ja) * | 2014-10-24 | 2016-05-19 | 昭和電工株式会社 | 垂直磁気記録媒体、垂直磁気記録媒体の製造方法、垂直記録再生装置 |
JP2016115379A (ja) * | 2014-12-15 | 2016-06-23 | 昭和電工株式会社 | 垂直記録媒体、垂直記録再生装置 |
Also Published As
Publication number | Publication date |
---|---|
US7706103B2 (en) | 2010-04-27 |
US20080024910A1 (en) | 2008-01-31 |
CN101114483B (zh) | 2013-05-15 |
CN101114483A (zh) | 2008-01-30 |
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