JP5732194B2 - 磁化可能な媒体を切り替える光磁気スイッチング素子および方法 - Google Patents
磁化可能な媒体を切り替える光磁気スイッチング素子および方法 Download PDFInfo
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
- Optical Recording Or Reproduction (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Description
また、材料の磁化率χMに応じて変わる。キュリー温度(TC)でχMは発散する[図1(b)]。したがって、磁化を制御するのに必要な磁界は、キュリー温度付近にその最小値を有し、比較的低い磁界は材料の保磁力よりもさらに高いことがある。したがって、レーザービームのヘリシティによって誘起された磁界は、好ましくはキュリー温度付近で最も有効に材料の磁化を配向することができる。
Claims (18)
- ヒートシンク層を具えたベース基板層と、
ヒートシンク層に積層され、希土類金属−遷移金属合金とキャッピング層とを具えた磁化可能な磁区層を具えた磁化可能な媒体と、
前記媒体の磁化を選択的に配向するように、希土類金属−遷移金属合金に対して、キャッピング層を介して、前記磁化可能な媒体に電磁放射線ビームを放射することによって、前記磁化可能な媒体の磁気スピン系に対して、前記電磁放射により角運動量を付与するように適合された電磁放射系とを備える、媒体中の磁化の方向を切り替える光磁気スイッチング素子。 - 前記電磁放射系が、記録されるべき情報状態に対応するヘリシティを有する光を含む、請求項1に記載の素子。
- 前記電磁放射系が、逆ファラデー効果による光誘起磁界が磁化を切り替えるのに必要な磁界強度よりも高いようにして、強度を付与するように配置される、請求項1に記載の素子。
- 前記電磁放射系が、磁化可能な磁区層のキュリー温度よりも低く保たれる熱エネルギーを付与するように配置される、請求項1に記載の素子。
- 前記電磁放射系が、前記磁区の保磁力が周囲の磁区の反磁界よりも高いように、十分に低い熱エネルギーを付与するように配置される、請求項1に記載の素子。
- 基板が、磁気スイッチングの目標温度を提供するように配置された吸熱材料を含む、請求項1に記載の素子。
- 前記磁化可能な磁区層がフェリ磁性体で構成される、請求項1に記載の素子。
- 前記磁化可能な磁区層が面外磁化および面外異方性軸で構成される、請求項1に記載の素子。
- 前記磁化可能な磁区層の磁化が、電磁放射線ビームの前記角運動量に応じて反対方向で配向される、請求項8に記載の素子。
- 前記磁化可能な磁区層がGdFeCoを含む、請求項1に記載の素子。
- 前記ベース基板層がガラスを含み、前記ヒートシンク層がAlTiを含み、かつ前記キャッピング層がSiNを含む、請求項1に記載の素子。
- 請求項1に記載の素子を含む、反対の磁化またはスピンの領域として情報「ビット」を記録する記録素子。
- ヒートシンク層を具えたベース基板層を提供する工程と、
ヒートシンク層に積層され、希土類金属−遷移金属合金とキャッピング層とを具えた磁化可能な磁区層を具えた磁化可能な媒体を提供する工程と、
選択的に選ばれた角運動量の電磁放射線ビームを提供する工程と、
前記媒体の磁化を選択的に配向するように、希土類金属−遷移金属合金に対して、キャッピング層を介して、前記磁化可能な媒体に電磁放射線ビームを放射することによって、前記磁化可能な媒体の磁気スピン系に対して、前記角運動量を前記電磁放射によって、伝達するように、前記放射線ビームを前記媒体に導く工程とを含む、磁化可能な媒体中の磁化の方向を切り替える方法。 - 前記磁化可能な媒体が、放射線ビームのフルエンスと併せて、目標区域を前記媒体のキュリー温度よりも低い温度まで上昇させる熱的性質を有するように選ばれる、請求項13に記載の方法。
- 前記角運動量を、情報を表し、それによって前記情報を前記媒体に記録するように選択的に選ぶ工程をさらに含む、請求項13に記載の方法。
- パルス放射線ビームを使用する工程をさらに含む、請求項13に記載の方法。
- 前記放射線ビームのパルス持続時間が40フェムト秒未満である、請求項16に記載の方法。
- 情報を記録する目的で前記磁化可能な媒体中の磁化の方向を切り替える工程をさらに含む、請求項13に記載の方法。
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PCT/NL2006/000264 WO2007136243A1 (en) | 2006-05-24 | 2006-05-24 | Magneto-optical switching device and method for switching a magnetizable medium |
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EP (1) | EP2030202B1 (ja) |
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KR (1) | KR101276501B1 (ja) |
CN (1) | CN101529514B (ja) |
AT (1) | ATE478419T1 (ja) |
CA (1) | CA2653437C (ja) |
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US8068715B2 (en) | 2007-10-15 | 2011-11-29 | Telescent Inc. | Scalable and modular automated fiber optic cross-connect systems |
CN102119473B (zh) | 2008-06-09 | 2012-07-04 | 惠普开发有限公司 | 用于光学信号路由的圆柱形谐振器 |
DE102010003811A1 (de) | 2010-04-09 | 2011-10-13 | Leibniz-Institut Für Festkörper- Und Werkstoffforschung Dresden E.V. | Verfahren und Anordnung zur Manipulation von in einem magnetischen Medium gespeicherten Domäneninformationen |
JP5812380B2 (ja) * | 2010-07-16 | 2015-11-11 | 学校法人日本大学 | 情報記録ヘッド、情報記録装置、情報記録方法及び光デバイス |
WO2012019806A1 (de) * | 2010-08-12 | 2012-02-16 | Leibniz-Institut Für Festkörper- Und Werkstoffforschung Dresden E.V. | Verfahren und anordnung zur anregung von spinwellen in magnetischen festkörpern |
US9103729B1 (en) | 2011-09-30 | 2015-08-11 | Seagate Technology Llc | Method and apparatus for determining curie temperature distribution of a sample of magnetic material |
RU2510084C1 (ru) * | 2012-08-29 | 2014-03-20 | Общество с ограниченной ответственностью "Росбиоквант", (ООО "Росбиоквант") | Способ записи и воспроизведения информации |
US9812202B2 (en) | 2012-12-26 | 2017-11-07 | Yemliha Bilal KALYONCU | Three dimensional opto-magnetic data storage system and method |
US9280996B2 (en) * | 2013-12-13 | 2016-03-08 | HGST Netherlands B.V. | All-optical magnetic recording system using FeMnPt media |
US10345526B2 (en) * | 2014-12-14 | 2019-07-09 | Telescent Inc. | High reliability robotic cross-connect systems |
US9336832B1 (en) | 2015-05-22 | 2016-05-10 | Seagate Technology Llc | Heat-assisted rotating disk magnetometer for ultra-high anisotropy magnetic measurements |
US9916868B1 (en) | 2015-05-22 | 2018-03-13 | Seagate Technology Llc | Heat-assisted rotating disk magnetometer for ultra-high anisotropy magnetic measurements |
CN106969534A (zh) * | 2017-03-24 | 2017-07-21 | 张模辉 | 一种光磁转换系统及方法 |
US20240111181A1 (en) | 2020-12-08 | 2024-04-04 | Tohoku University | Optical switch element, optical switch device, optical communication system, and optical computer |
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DD105344A1 (ja) | 1972-04-05 | 1974-04-12 | ||
EP0316188A3 (en) | 1987-11-12 | 1990-10-31 | MOVID Information Technology, Inc. | Method and apparatus for direct overwriting of digital data recorded on magneto-optical recording media including a direct overwrite magneto-optic system for strip erasing and recording elongated domains and a single-head, direct overwrite magneto-optic system |
JP2636957B2 (ja) * | 1990-08-10 | 1997-08-06 | シャープ株式会社 | 磁気記録再生装置 |
JP3079795B2 (ja) * | 1992-09-18 | 2000-08-21 | 株式会社日立製作所 | 光記録再生装置、光ピックアップおよびレ−ザ光源 |
JPH08250331A (ja) * | 1995-03-08 | 1996-09-27 | Toshiba Corp | 磁性体の磁化方向制御方法およびそれを利用した磁気デバイス |
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US6388912B1 (en) | 2000-03-30 | 2002-05-14 | Intel Corporation | Quantum magnetic memory |
JP2002097099A (ja) * | 2000-09-21 | 2002-04-02 | Rikogaku Shinkokai | 円偏光励起磁性半導体およびそれを用いた光記録媒体 |
JP4350312B2 (ja) | 2001-01-12 | 2009-10-21 | キヤノン株式会社 | 磁壁移動型光磁気記録媒体および情報再生方法 |
JP2005317178A (ja) * | 2004-03-29 | 2005-11-10 | Sharp Corp | 記録再生装置、記録媒体、記録再生装置の駆動方法、半導体レーザの寿命予測方法、プログラム、プログラム記録媒体、半導体レーザ |
KR100725387B1 (ko) | 2004-08-24 | 2007-06-08 | 삼성전자주식회사 | 데이터 방송에서의 전송 코드 세트 시그널링 방법 및 장치 |
US7746689B2 (en) * | 2005-11-30 | 2010-06-29 | Intel Corporation | Molecular quantum memory |
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JP2009538490A (ja) | 2009-11-05 |
IL195450A (en) | 2013-11-28 |
CA2653437C (en) | 2014-07-15 |
ATE478419T1 (de) | 2010-09-15 |
US20110058458A1 (en) | 2011-03-10 |
KR20090086904A (ko) | 2009-08-14 |
EP2030202B1 (en) | 2010-08-18 |
US8054713B2 (en) | 2011-11-08 |
IL195450A0 (en) | 2009-08-03 |
KR101276501B1 (ko) | 2013-06-18 |
CA2653437A1 (en) | 2007-11-29 |
US8345516B2 (en) | 2013-01-01 |
US20120257483A1 (en) | 2012-10-11 |
DE602006016347D1 (de) | 2010-09-30 |
WO2007136243A1 (en) | 2007-11-29 |
CN101529514A (zh) | 2009-09-09 |
EP2030202A1 (en) | 2009-03-04 |
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