Microwave-assisted magnetization reversal of perpendicularly magnetized nanoscale magnetic dot and its applications to nonvolatile memories

• Project/Area Number: 20686025
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Electron device/Electronic equipment
• Research Institution: Kyushu University
• Principal Investigator: NOZAKI Yukio Kyushu University, 理工学部, 准教授 (30304760)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥26,000,000 (Direct Cost: ¥20,000,000、Indirect Cost: ¥6,000,000); Fiscal Year 2010: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2009: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2008: ¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
• Keywords: 強磁性共鳴 / マイクロ波アシスト記録 / 垂直磁気記録 / 垂直磁気異方性 / 磁気記録 / 磁性 / スピンエレクトロニクス / 電子デバイス・機器 / マイクロ波 / 磁化反転 / ネットワークアナライザ / 垂直磁化膜

Research Abstract

The purpose of this research project is to realize a microwave-assisted magnetization reversal in perpendicularly magnetized films with a large magnetic anisotropy. The results are summarized as follows : (1) The geometrical design of coplanar waveguide producing a microwave field was optimized to be able to realize the microwave-assisted magnetization reversal. (2) It was experimentally confirmed that the magnetization reversal of Co/Pd multilayer with a perpendicular magnetic anisotropy was encouraged by the application of microwave field with a frequency of 10% lower than the intrinsic ferromagnetic resonance frequency.

Research Products

• [Journal Article] 微細加工したコプレーナ線路を用いたマイクロ波アシスト磁化反転実験 (2011)
  • Author(s): 能崎幸雄, ら
  • Journal Title: 信学技報 Volume: 110 Pages: 39-46
  • NAID: 110008688903
• [Journal Article] Detection of ferromagnetic resonance in a single-crystalline Fe wire using arectifying effect (2011)
  • Author(s): Y.kasatani, et al.
  • Journal Title: Journal of Physics, Conference series Volume: 266
  • Peer Reviewed
• [Journal Article] マイクロ波アシスト磁気記録における記録ビットパターンの媒体飽和磁化依存性 (2010)
  • Author(s): 田中輝光, ら
  • Journal Title: 電気学会論文誌A Volume: 130 Pages: 648-654
  • Peer Reviewed
• [Journal Article] グラニュラー媒体への狭トラックマイクロ波アシスト磁気記録シミュレーション (2010)
  • Author(s): 加藤歩, ら
  • Journal Title: 信学技報 Volume: 110 Pages: 1-5
• [Journal Article] Dependence of Magnetization Switching Property with Microwave Assistance on Anisotropy Field for ECC Nano-pillar (2010)
  • Author(s): N.Narita, et al.
  • Journal Title: Proc.IEEE TENCON2010 Volume: 1 Pages: 1898-1901
  • Peer Reviewed
• [Journal Article] Microwave-assisted magnetization reversal in a Co/Pd multilayer with perpendicular magnetic anisotropy. (2009)
  • Author(s): Y.Nozaki
  • Journal Title: Applied Physics Letters Vol.95, No.8
  • Peer Reviewed
• [Journal Article] Stochastic simulation of thermally assisted magnetization reversal in sub-100nm dots with perpendicular anisotropy. (2009)
  • Author(s): B.Purnama, M.Koga, Y.Nozaki, K.Matsuyama
  • Journal Title: J. Magn. Magn. Mater. Vol.321, No.9 Pages: 1325-1330
  • Peer Reviewed
• [Journal Article] サブミクロン幅NiFe薄膜パターンのマイクロ波アシスト磁化反転 (2009)
  • Author(s): 立石健太郎, 白石壮馬, 能崎幸雄, 松山公秀
  • Journal Title: J.Magn. Soc. Jpn. Vol.33, No.3 Pages: 208-211
  • NAID: 10025969693
  • Peer Reviewed
• [Journal Article] Material dependence of the thermally assisted magnetization reversal properties in microstructured Co/Pd multilayers. (2009)
  • Author(s): B.Purnama, T.Tanaka, Y.Nozaki, K.Matsuyama
  • Journal Title: Applied Physics Express Vol.2, No.3
  • NAID: 10025085117
  • Peer Reviewed
• [Journal Article] Experiments on microwave-assisted magnetization reversal in a submicron-scale Permalloy single element with a zero-field resonance frequency of 6.3GHz. (2009)
  • Author(s): Y.Nozaki
  • Journal Title: Applied Physics Express Vol.2, No.3
  • NAID: 10025085133
  • Peer Reviewed
• [Journal Article] Numerical study on microwave-assisted magnetization reversal of magnetic particles several tens of nanometers wide with perpendicular anisotropy. (2009)
  • Author(s): Y.Nozaki
  • Journal Title: Journal of Applied Physics Vol.105, No.7
  • Peer Reviewed
• [Journal Article] Bistable control of ferromagnetic resonance frequencies in ferromagnetic trilayered dots. (2009)
  • Author(s): Y.Nozaki
  • Journal Title: Journal of Applied Physics Vol.105, No.1
  • Peer Reviewed
• [Journal Article] Bistable control of ferromagnetic resonance frequencies in ferromagnetic trilayered dots. (2009)
  • Author(s): Yukio Nozaki, et al.
  • Journal Title: Journal of Applied Physics 105
  • Peer Reviewed
• [Journal Article] Numerical study on microwave-assisted magnetization reversal of magnetic particles several tens of nanometers wide with perpendicular anisotropy. (2009)
  • Author(s): Yukio Nozaki, et al.
  • Journal Title: Journal of Applied Physics 105
  • Peer Reviewed
• [Journal Article] Experiments on microwave-assisted magnetization reversal in a submicron-scale Permalloy single element with a zero-field resonance frequency of 6.3 GHz. (2009)
  • Author(s): Yukio Nozaki, et al.
  • Journal Title: Applied Physics Express 2
  • NAID: 10025085133
  • Peer Reviewed
• [Journal Article] サブミクロン幅NiFe薄膜パターンのマイクロ波アシスト磁化反転 (2009)
  • Author(s): 立石健太郎, ら
  • Journal Title: JOURNAL OF Magnetic Society of Japan 33 Pages: 208-211
  • Peer Reviewed
• [Journal Article] Microwave-assisted magnetization reversal in a Co/Pd multilayer with perpendicular magnetic anisotropy. (2009)
  • Author(s): Yukio Nozaki, et al.
  • Journal Title: Applied Physics Letters 95
  • Peer Reviewed
• [Journal Article] Bistable control of ferromagnetic resonance frequencies in ferromagnetic trilayered dots (2009)
  • Author(s): Y. Nozaki, et.al.
  • Journal Title: Journal of Applied Physics 105
  • Peer Reviewed
• [Journal Article] Experiments on microwave-assisted magnetization reversal in a submicron-scale Permalloy single element with a zero-field resonance frequency of 6.3 GHz (2009)
  • Author(s): Y. Nozaki, et.al.
  • Journal Title: Applied Physics Express 2
  • NAID: 10025085133
  • Peer Reviewed
• [Journal Article] Influence of interlayer magnetostatic coupling on the ferromagnetic resonance properties of lithographically patterned ferromagnetic trilayers. (2008)
  • Author(s): Y.Nozaki
  • Journal Title: Applied Physics Letters Vol.92
  • Peer Reviewed
• [Journal Article] Influence of interlayer magnetostatic coupling on the ferromagnetic resonance properties of lithographically patterned ferromagnetic trilayers (2008)
  • Author(s): Y. Nozaki, et.al.
  • Journal Title: Applied Physics Letters 92
  • Peer Reviewed
• [Journal Article] Micromagnetic study on microwave-assisted magnetic recording in perpendicular medium with intergrain exchange coupling
  • Author(s): Y.Nozaki
  • Journal Title: Journal of Applied Physics in press.
  • Peer Reviewed
• [Presentation] 微細加工したコプレーナ線路を用いたマイクロ波アシスト磁化反転実験(Invited) (2011)
  • Author(s): 能崎幸雄, ら
  • Organizer: 電子情報通信学会磁気記録・情報ストレージ研究会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2011-03-11
• [Presentation] 微細加工したコプレーナ線路を用いたマイクロ波アシスト磁化反転実験 (2011)
  • Author(s): 能崎幸雄, ら
  • Organizer: 電子情報通信学会磁気記録・情報ストレージ(MR)研究会
  • Place of Presentation: 名古屋大学(Invited)
  • Year and Date: 2011-03-11
• [Presentation] ナノスケール強磁性薄膜の強磁性共鳴測定 (2011)
  • Author(s): 能崎幸雄, ら
  • Organizer: 4大学ナノ・マイクロファブリケーションコンソーシアム拠点形成シンポジウム
  • Place of Presentation: 川崎市,神奈川県
  • Year and Date: 2011-03-04
• [Presentation] 次世代磁気記録の課題 (2011)
  • Author(s): 能崎幸雄
  • Organizer: 第10回KLL産学連携セミナー
  • Place of Presentation: 慶應義塾大学
  • Year and Date: 2011-02-25
• [Presentation] マイクロ波を用いた新しい磁気記録(Invited) (2011)
  • Author(s): 能崎幸雄
  • Organizer: 第140回スピニクス研究会
  • Place of Presentation: 東北大学
  • Year and Date: 2011-02-24
• [Presentation] マイクロ波を用いた新しい磁気記録 (2011)
  • Author(s): 能崎幸雄
  • Organizer: 第140回スピニクス研究会
  • Place of Presentation: 東北大学(Invited)
  • Year and Date: 2011-02-24
• [Presentation] Microwave-assisted magnetization reversal characteristics for ECC nano-pillar (2010)
  • Author(s): T.Tanaka, et al.
  • Organizer: J-MRS
  • Place of Presentation: Yokohama, Japan
  • Year and Date: 2010-12-21
• [Presentation] Track density capability of microwave assisted magnetic recording (2010)
  • Author(s): A.Kato, et al.
  • Organizer: 55th Annual Conference on Magnetism and Magnetic Materials (55th MMM)
  • Place of Presentation: Atlanta, USA
  • Year and Date: 2010-11-17
• [Presentation] MAMR dependence on anisotropy field for ECC structured nano-pillar (2010)
  • Author(s): N.Narita, et al.
  • Organizer: 55th Annual Conference on Magnetism and Magnetic Materials (55th MMM)
  • Place of Presentation: Atlanta, USA
  • Year and Date: 2010-11-17
• [Presentation] Dependence of MAMR on damping constanct for ECC nano-pillar (2010)
  • Author(s): N.Narita, et al.
  • Organizer: International Symposium on Advanced Magnetic Materials and Applications (ISAMMA 2010)
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2010-07-16
• [Presentation] Micromagnetic Study on Microwave-Assisted Magnetic Recording in Perpendicular Medium with Intergrain Exchnage Coupling.(Invited) (2010)
  • Author(s): Y.Nozaki, et al.
  • Organizer: The 2nd International Symposium on Advanced Magnetic Materials and Applications
  • Place of Presentation: Sendai, Japan.
  • Year and Date: 2010-07-15
• [Presentation] Micromagnetic Study on Microwave-Assisted Magnetic Recording in Perpendicular Medium with Intergrain Exchnage Coupling (2010)
  • Author(s): Y.Nozaki, et al.
  • Organizer: International Symposium on Advanced Magnetic Materials and Applications (ISAMMA 2010)
  • Place of Presentation: Sendai, Japan(Invited)
  • Year and Date: 2010-07-15
• [Presentation] Experimental study on optimum frequency for microwave-assisted magnetization reversal in perpendicularly magnetized Co/Pd multilayer. (2010)
  • Author(s): Y.Nozaki, et al.
  • Organizer: 11th Joint MMM-Intermag Conference
  • Place of Presentation: Washington DC, USA.
  • Year and Date: 2010-01-19
• [Presentation] Experimental study on optimum frequency for microwave-assisted magnetization reversal in perpendicularly magnetized Co/Pd multilayer. (2010)
  • Author(s): Yukio Nozaki
  • Organizer: 11th Joint MMM-Intermag Conference 2010
  • Place of Presentation: Washington DC (USA)
  • Year and Date: 2010-01-19
• [Presentation] マイクロコプレーナ線路を用いたマイクロ波アシスト記録実験(Invited) (2009)
  • Author(s): 能崎幸雄, ら
  • Organizer: 電子情報通信学会磁気記録・情報ストレージ(MR)研究会
  • Place of Presentation: 福岡市
  • Year and Date: 2009-10-08
• [Presentation] Experimental and numerical study on microwave-assisted recording of perpendicular medium. (Invited) (2009)
  • Author(s): Y.Nozaki, et al.
  • Organizer: Intl. symposium at the 33rd Annual Conference on Magnetics
  • Place of Presentation: Nagasaki, Japan.
  • Year and Date: 2009-09-15
• [Presentation] Experimental and numerical study on microwave-assisted recording of perpendicular medium. (Invited) (2009)
  • Author(s): Yukio Nozaki
  • Organizer: Intl. Symposium session at The 33rd Annual Conference on Magnetics.
  • Place of Presentation: Nagasaki (Japan)
  • Year and Date: 2009-09-14
• [Presentation] Detection of magnetization reversal in patterned magnetic thin films with perpendicular anisotropy by means of vector network analyzer FMR spectroscopy. (2009)
  • Author(s): Y.Nozaki, et al.
  • Organizer: The International Conference on Magnetism
  • Place of Presentation: Karlsruhe, Germany.
  • Year and Date: 2009-07-30
• [Presentation] Detection of magnetization reversal in patterned magnetic thin films with perpendicular anisotropy by means of vector network analyzer FMR spectroscopy. (2009)
  • Author(s): Yukio Nozaki
  • Organizer: The Internationla Conference on Magnetism
  • Place of Presentation: Karlsruhe (Germany)
  • Year and Date: 2009-07-30
• [Presentation] Experimental study on microwave-assisted recording of perpendicular medium using microwave field generated by coplanar waveguide. (Invited) (2009)
  • Author(s): Y.Nozaki
  • Organizer: International Disc Forum 2009
  • Place of Presentation: Tokyo, Japan.
  • Year and Date: 2009-07-22
• [Presentation] Experimental study on microwave-assisted recording of perpendicular medium using microwave field generated by coplanar waveguide. (Invited) (2009)
  • Author(s): Yukio Nozaki
  • Organizer: International Disc Forum 2009
  • Place of Presentation: Tokyo (Japan)
  • Year and Date: 2009-07-22
• [Presentation] Experimental study on microwave-assisted magnetization reversal in patterned ferromagnetic thin films. (Invited) (2009)
  • Author(s): Y.Nozaki, et al.
  • Organizer: IEEE Intermag
  • Place of Presentation: Sacramento, CA, USA.
  • Year and Date: 2009-05-07
• [Presentation] Experimental study on microwave-assisted magnetization reversal in patterned ferromagnetic thin films.(Invited) (2009)
  • Author(s): Yukio Nozaki
  • Organizer: IEEE International Magnetics Conference
  • Place of Presentation: Sacramento (USA)
  • Year and Date: 2009-05-07
• [Presentation] ベクトルネットワークアナライザFMR分光法による垂直磁化膜パターンの磁化反転検出 (2009)
  • Author(s): 能崎幸雄, ら
  • Organizer: 第56回応用物理学会
  • Place of Presentation: 筑波大学
  • Year and Date: 2009-03-30
• [Presentation] ベクトルネットワークアナライザFMR分光法による垂直磁化膜パターンの磁化反転検出 (2009)
  • Author(s): 能崎幸雄
  • Organizer: 2009年春季第56回応用物理学関係連合講演会
  • Place of Presentation: 筑波大学(茨城県)
  • Year and Date: 2009-03-30
• [Presentation] コプレーナ線路上に作製した強磁性薄膜パターンのマイクロ波アシスト磁化反転(Invited) (2009)
  • Author(s): 能崎幸雄, ら
  • Organizer: 電子情報通信学会
  • Place of Presentation: 愛媛大学
  • Year and Date: 2009-03-20
• [Presentation] コプレーナ線路上に作製した強磁性薄膜パターンのマイクロ波アシスト磁化反転(Inited) (2009)
  • Author(s): 能崎幸雄
  • Organizer: 2009年電子情報通信学会総合大会
  • Place of Presentation: 愛媛大学(愛媛県)
  • Year and Date: 2009-03-20
• [Presentation] ベクトルネットワークアナライザFMR分光法によるNiFe薄膜パターンのマイクロ波アシスト磁化反転検出(Invited) (2009)
  • Author(s): 能崎幸雄, ら
  • Organizer: 日本磁気学会第165回研究会
  • Place of Presentation: 中央大学
  • Year and Date: 2009-03-13
• [Presentation] ベクトルネットワークアナライザFMR分光法によるMFe薄膜パターンのマイクロ波アシスト磁化反転検出(Inited) (2009)
  • Author(s): 能崎幸雄
  • Organizer: 日本磁気学会第165回研究会
  • Place of Presentation: 中央大学(東京都)
  • Year and Date: 2009-03-13
• [Presentation] マイクロ波磁界を用いた垂直磁化膜パターンのスイッチング磁界低減(Invited) (2009)
  • Author(s): 能崎幸雄, ら
  • Organizer: 第24回スピンエレクトロニクス専門研究会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2009-01-16
• [Presentation] マイクロ波磁界を用いた垂直磁化膜パターンのスイッチング磁界低減(Inited) (2009)
  • Author(s): 能崎幸雄
  • Organizer: 第24回スピンエレクトロニクス専門研究会
  • Place of Presentation: 名古屋大学(愛知県)
  • Year and Date: 2009-01-16
• [Presentation] Numerical study on microwave-assisted magnetization reversal of several tens nm wide magnetic particle with perpendicular anisotropy. (2008)
  • Author(s): Y.Nozaki, et al.
  • Organizer: 53rd Annual Conference on Magnetism and Magnetic Materials
  • Place of Presentation: Austin, Texas, USA.
  • Year and Date: 2008-11-13
• [Presentation] Numerical study on microwave-assisted magnetization reversal of several tens nm wide magnetic particle with perpendicular anisotropy (2008)
  • Author(s): Y. Nozaki
  • Organizer: 53rd Annual Conference on Magnetism and Maanetic Materials (MMM' 08)
  • Place of Presentation: アメリカ・オースチン市
  • Year and Date: 2008-11-13
• [Presentation] Optimum conditions for microwave-assisted magnetization reversal of 30-nm-thick Permalloy film with lateral size of 2×0.2μm^2 fabricated on 0.2-μm-wide coplanar waveguide. (2008)
  • Author(s): Y.Nozaki, et al.
  • Organizer: 53rd Annual Conference on Magnetism and Magnetic Materials
  • Place of Presentation: Austin, Texas, USA.
  • Year and Date: 2008-11-12
• [Presentation] Optimum conditions for microwave-assisted magnetization reversal of 30nm thick Permalloy film with lateral size of 2x0.2 Rna^2 (2008)
  • Author(s): Y. Nozaki
  • Organizer: 53rd Annual Conference on Magnetism and Magnetic Materials (MMM' 08)
  • Place of Presentation: アメリカ・オースチン市
  • Year and Date: 2008-11-12
• [Presentation] マイクロ波磁界を用いた低消費電力磁気記録 (2008)
  • Author(s): 能崎幸雄
  • Organizer: イノベーションジャパン新技術説明会
  • Place of Presentation: 東京国際フォーラム
  • Year and Date: 2008-09-17
• [Presentation] マイクロ波磁界を用いた低消費電力磁気記録 (2008)
  • Author(s): 能崎幸雄
  • Organizer: イノベーションジャパン2008・新技術説明会
  • Place of Presentation: 東京国際フォーラム(東京都)
  • Year and Date: 2008-09-17
• [Presentation] サブミクロン幅NiFe薄膜パターンのマイクロ波アシスト磁化反転 (2008)
  • Author(s): 能崎幸雄
  • Organizer: 第32回日本磁気学会学術講演会
  • Place of Presentation: 東北学院大学(宮城県)
  • Year and Date: 2008-09-14
• [Presentation] 垂直磁化膜パターンにおけるマイクロ波アシスト磁化反転の計算機シミュレーション (2008)
  • Author(s): 能崎幸雄
  • Organizer: 第32回日本磁気学会学術講演会
  • Place of Presentation: 東北学院大学(宮城県)
  • Year and Date: 2008-09-13
• [Presentation] On-chip FMR検出を用いた強磁性薄膜パターンのマイクロ波アシスト磁化反転実験 (2008)
  • Author(s): 能崎幸雄, ら
  • Organizer: 第69回応用物理学会
  • Place of Presentation: 中部大学
  • Year and Date: 2008-09-03
• [Presentation] On-chip FMR検出を用いた強磁腔薄膜パターンρマイクロ波アシスト磁化反転実験 (2008)
  • Author(s): 能崎幸雄
  • Organizer: 2008年秋季第69回応用物理学会学術講演会
  • Place of Presentation: 中部大学(愛知県)
  • Year and Date: 2008-09-03
• [Presentation] ナノ磁性体のスピンマニピユレーション (2008)
  • Author(s): 能崎幸雄
  • Organizer: 公開講座・先端サマーセミナー
  • Place of Presentation: 福岡市
  • Year and Date: 2008-08-07
• [Presentation] 強磁性薄膜パターンのマイクロ波アシスト磁化反転実験(Invited) (2008)
  • Author(s): 能崎幸雄, ら
  • Organizer: 電気学会マグネティクス研究会
  • Place of Presentation: 仙台市
  • Year and Date: 2008-08-04
• [Presentation] 強磁性薄膜パターンのマイクロ波アシスト磁化反転実験(Inited) (2008)
  • Author(s): 能崎幸雄
  • Organizer: 電気学会マグネティクス研究会
  • Place of Presentation: 東北大学(宮城県)
  • Year and Date: 2008-08-04
• [Presentation] マイクロ波磁界を用いた低電力磁化スイッチング (2008)
  • Author(s): 能崎幸雄, ら
  • Organizer: 第9回九州磁気セミナー
  • Place of Presentation: 平戸市
  • Year and Date: 2008-05-22
• [Presentation] Bistable control of ferromagnetic resonance frequencies in ferromagnetic trilayered dots. (2008)
  • Author(s): Y.Nozaki, et al.
  • Organizer: IEEE Intermag
  • Place of Presentation: Madrid, Spain.
  • Year and Date: 2008-05-07
• [Presentation] Bistable control of ferromagnetic resonance frequencies in ferromagnetic trilayered dots (2008)
  • Author(s): Y. Nozaki
  • Organizer: IEEE International Magnetics Conference (Intermag'08)
  • Place of Presentation: スペイン・マドリッド市
  • Year and Date: 2008-05-07
• [Remarks] ホームページ等
• [Remarks]
  • URL: http://spin.ed.kyushu-u.ac.jp/
• [Patent(Industrial Property Rights)] 磁気連想メモリ及び磁気連想メモリからの情報読み出し方法 (2009)
  • Inventor(s): 松山公秀, 能崎幸雄
  • Industrial Property Rights Holder: 九州大学
  • Acquisition Date: 2009-12-18
• [Patent(Industrial Property Rights)] 磁気連想メモリ及び磁気連想メモリからの情報読み出し方法 (2009)
  • Inventor(s): 松山公秀能崎幸雄
  • Industrial Property Rights Holder: 松山公秀能崎幸雄
  • Acquisition Date: 2009-12-18
• [Patent(Industrial Property Rights)] 磁性多層膜ドットを用いた高周波デバイス (2008)
  • Inventor(s): 能崎幸雄, 松山公秀
  • Industrial Property Rights Holder: 九州大学
  • Acquisition Date: 2008-09-26