Aberration corrected spin polarized low energy electron microscope

Lei Yu; Weishi Wan; Takanori Koshikawa; Meng Li; Xiaodong Yang; Changxi Zheng; Masahiko Suzuki; Tsuneo Yasue; Xiuguang Jin; Yoshikazu Takeda; Ruud Tromp; Wen-Xin Tang

doi:10.1016/j.ultramic.2020.113017

Aberration corrected spin polarized low energy electron microscope

Ultramicroscopy. 2020 Sep:216:113017. doi: 10.1016/j.ultramic.2020.113017. Epub 2020 May 21.

Authors

Lei Yu¹, Weishi Wan², Takanori Koshikawa³, Meng Li¹, Xiaodong Yang¹, Changxi Zheng⁴, Masahiko Suzuki⁵, Tsuneo Yasue³, Xiuguang Jin⁶, Yoshikazu Takeda⁷, Ruud Tromp⁸, Wen-Xin Tang¹

Affiliations

¹ College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.
² ShanghaiTech University, Shanghai, 200031, China.
³ Osaka Electro-Communication University, Neyagawa, Osaka 572-8530, Japan.
⁴ School of Science, Westlake University, Hangzhou 310024, Zhejiang Province, China.
⁵ National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.
⁶ High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan.
⁷ Aichi Synchrotron Radiation Center, Seto, Aichi 489-0965, Japan.
⁸ IBM Research Division, T. J. Watson Research Center, Yorktown Heights, NY 10598, USA.

PMID: 32506000
DOI: 10.1016/j.ultramic.2020.113017

Abstract

Spin Polarized Low Energy Electron Microscopy (SPLEEM) is a powerful tool to reveal the magnetic structure of ferromagnetic surfaces on the atomic depth scale level[1-3]. With aberration corrected LEEM and a high brightness spin polarized electron gun, high spatial resolution will provide more details for ultra-thin ferromagnetic film studies. This study reports the first realization of aberration corrected SPLEEM (AC-SPLEEM). The performance of the setup was tested on ferromagnetic Fe nanoscale islands on a W(110) single crystal, with spatial resolution of 3.3 nm in spin asymmetry images.