Development of Spin Torque Micro wave Oscillator with Nano-Contact Magnetoresistance for tip-to-tip wireless communication

开发具有纳米接触磁阻的自旋扭矩微波振荡器，用于尖端无线通信

• 批准号: 24860008
• 负责人: SHIOKAWA Yohei
• 金额: $ 1.91万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Research Activity Start-up
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-08-31 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24860008/
• 关键词: スピンエレクトロニクス; 電子デバイス・機器; 磁性; ナノコンタクト; マイクロ波発振器; スピントルク; スピントロニクス; マイクロ波; vortex; 磁気抵抗素子; 磁気抵抗効果; ナノ接点; 自己組織化; 酸化還元反応; conductive-AFM; Voltex発振

In order to realize the low power consumption wireless communication, Nano-Contact Magnetoresistance (NCMR) device which has a lot of 2 nm diameter ferromagnetic Nano-Contacts in Al2O3 has been investigated to be obtained the high micro wave power of 1 uW as an oscillator. For the increase of NCMR ratio to achieve the high power, I improved the roughness of the surface, the self-organized process of NCs, and all that. In the result, MR ratio of 20 % (twice as high as previous report) was obtained. I measured the micro wave spectrum with this improved NCMR device, and obtained the high power of 300 nW (6 times as high as previous report). Considering the reflection coefficient, the impedance matched sample could be achieved the 1uW.

为了实现低功耗的无线通信，研究了纳米接触磁阻（NCMR）器件，该器件在Al2O3中具有大量直径为2 nm的铁磁纳米接触，可以获得1 uW的高微波功率作为振荡器。为了提高NCMR比以实现高功率，我改进了表面粗糙度、NC的自组织过程等。结果表明，MR率为20%（是以前报道的2倍）.用改进后的NCMR装置测量了微波频谱，获得了300 nW的高功率（是以前报道的6倍）。考虑到反射系数，阻抗匹配样品可以达到1uW。

项目成果

Oxygen impurity influence on resistivity,⊿RA, and bulk spin scattering asymmetry in FeCo CPP-GMR

氧杂质对 FeCo CPP-GMR 中电阻率、⊿RA 和体自旋散射不对称性的影响

• 发表时间: 2012
• 作者: Yohei Shiokawa;JinWon Jung;Kohei Kishi;Homare Watanabe;Zhong Zheng;and Masashi Sahashi
• 通讯作者: and Masashi Sahashi

Oxygen impurity inuence on resistivity, ΔRA, and bulk spin scattering asymmetry in FeCo CPP-GMR

氧杂质对 FeCo CPP-GMR 中电阻率、ΔRA 和体自旋散射不对称性的影响

• 发表时间: 2012
• 作者: Shejuan Xie;Toshiyuki Takagi;Tetsuya Uchimoto and Zhenmao Chen;成瀬雅人;大石義彦,峠幸寛,田坂裕司,村井祐一;塩川陽平
• 通讯作者: 塩川陽平

Variation of spin-torque oscillation spectra of multi-domain states in a NCMR device

NCMR装置中多域态自旋力矩振荡谱的变化

• 发表时间: 2013
• 作者: Yuki Kozono;Yusuke Toda;Yuki Yata;Yohei Shiokawa;Kousaku Miyake;and Masashi Sahashi
• 通讯作者: and Masashi Sahashi

Potential abilities to realized both high emission power and narrow linewidth for microwave oscillation with NCMR devices

利用 NCMR 器件实现微波振荡的高发射功率和窄线宽的潜在能力

• 发表时间: 2014
• 作者: Yusuke Toda;Yohei Shiokawa;Muftah Al-Mahadawi;Keiya Sakamoto;and Masashi Sahashi
• 通讯作者: and Masashi Sahashi

ナノコンタクトにおける電気伝導特性

纳米接触的导电特性

• 发表时间: 2014
• 作者: 塩川陽平;鄭重;戸田裕介;久恒善美;佐橋政司
• 通讯作者: 佐橋政司