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Direct observation of high spin polarization in Co2FeAl thin films.
Zhang, Xiaoqian; Xu, Huanfeng; Lai, Bolin; Lu, Qiangsheng; Lu, Xianyang; Chen, Yequan; Niu, Wei; Gu, Chenyi; Liu, Wenqing; Wang, Xuefeng; Liu, Chang; Nie, Yuefeng; He, Liang; Xu, Yongbing.
Affiliation
  • Zhang X; Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China.
  • Xu H; Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China.
  • Lai B; Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China.
  • Lu Q; Department of Physics, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China.
  • Lu X; Department of Physics and Astronomy, University of Missouri, Columbia, MO, 65211, USA.
  • Chen Y; York-Nanjing Joint Centre (YNJC) for spintronics and nano engineering, Department of Electronics, The University of York, York, YO10 3DD, United Kingdom.
  • Niu W; Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China.
  • Gu C; Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China.
  • Liu W; National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
  • Wang X; Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China.
  • Liu C; York-Nanjing Joint Centre (YNJC) for spintronics and nano engineering, Department of Electronics, The University of York, York, YO10 3DD, United Kingdom.
  • Nie Y; Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China.
  • He L; Department of Physics, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China.
  • Xu Y; National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
Sci Rep ; 8(1): 8074, 2018 May 23.
Article in En | MEDLINE | ID: mdl-29795124
We have studied the Co2FeAl thin films with different thicknesses epitaxially grown on GaAs (001) by molecular beam epitaxy. The magnetic properties and spin polarization of the films were investigated by in-situ magneto-optic Kerr effect (MOKE) measurement and spin-resolved angle-resolved photoemission spectroscopy (spin-ARPES) at 300 K, respectively. High spin polarization of 58% (±7%) was observed for the film with thickness of 21 unit cells (uc), for the first time. However, when the thickness decreases to 2.5 uc, the spin polarization falls to 29% (±2%) only. This change is also accompanied by a magnetic transition at 4 uc characterized by the MOKE intensity. Above it, the film's magnetization reaches the bulk value of 1000 emu/cm3. Our findings set a lower limit on the thickness of Co2FeAl films, which possesses both high spin polarization and large magnetization.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Sci Rep Year: 2018 Document type: Article Affiliation country: China Country of publication: United kingdom
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Sci Rep Year: 2018 Document type: Article Affiliation country: China Country of publication: United kingdom