Development of spin-polarized pulsed TEM and the application of spin-resolved analysis

自旋偏振脉冲TEM的发展及自旋分辨分析的应用

• 批准号: 21221005
• 负责人: TANAKA Nobuo
• 金额: $ 133.29万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (S)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009-05-11 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21221005/
• 关键词: 電子顕微鏡; スピンエレクトロニクス; 量子ビーム

We have succeeded in a development of Spin-polarized and Pulsed TEM (SP-TEM) for the first time in the world. The SP-TEM has realized high performances of 90-% spin-polarization, 10-7-A/cm2sr brightness, 1.6-nm spatial resolution and less 240-meV energy spread with a beam energy of 30 keV simultaneously. It can provide a TEM image and diffraction pattern of iron thin film. Furthermore we have observed a pico-second pulsed electron beam in the SP-TEM. These results indicate that spatial-, temporal- and spin-resolved measurement is realized in this research program. It is amazing apparatus that the narrow line-width of zero-loss peak, the long spatial coherence length and the high spin-polarization are realized simultaneously. The abilities are useful to open a frontier of analytical method and research new physics and new material sciences.

我们在世界上首次成功地研制出了自旋极化脉冲透射电镜（SP-TEM）。SP-TEM在束流能量为30 keV时，实现了自旋极化率90%，亮度10 ~（-7）A/cm ~ 2sr，空间分辨率1.6 nm，能散小于240 meV的高性能。它可以提供铁薄膜的TEM图像和衍射图案。此外，我们还在SP-TEM中观察到了皮秒脉冲电子束。这些结果表明，空间，时间和自旋分辨的测量在本研究计划中实现。这是一种同时实现了窄零损耗峰线宽、长空间相干长度和高自旋极化的装置。这些能力有助于开拓分析方法的前沿，研究新物理和新材料科学。

项目成果

In-situ gas study and 3D quantification of titania photocatalysts by advanced electron microscopy

利用先进电子显微镜对二氧化钛光催化剂进行原位气体研究和 3D 定量

• 发表时间: 2011
• 作者: T. Abe;F. P. Sahin;K. Akiyama;T. Naito;M. Kishigami;K. Miyamoto;Y.Sakakibara;D. Uemura;N. Tanaka
• 通讯作者: N. Tanaka

電子顕微鏡

电子显微镜

• 发表时间: 2013

Fabrication and physical properties of double perovskite SrLaVMoO_6 thin films

双钙钛矿SrLaVMoO_6薄膜的制备及物理性能

• 发表时间: 2011
• 期刊: J.Appl.Phys
• 作者: H.Matsushima;H.Gotoh;T.Miyawaki;K.Ueda;H.Asano
• 通讯作者: H.Asano

Development of spin-polarized transmission electron microscope

• DOI: 10.1088/1742-6596/298/1/012016
• 发表时间: 2011-05
• 期刊: Journal of Physics: Conference Series
• 作者: M. Kuwahara;Y. Takeda;K. Saitoh;T. Ujihara;H. Asano;T. Nakanishi;N. Tanaka

30-kV spin-polarized transmission electron microscope with GaAs–GaAsP strained superlattice photocathode

• DOI: 10.1063/1.4737177
• 发表时间: 2012-07
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: M. Kuwahara;S. Kusunoki;X. Jin;T. Nakanishi;Y. Takeda;K. Saitoh;T. Ujihara;H. Asano;N. Tanaka