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Chin. Phys. B, 2020, Vol. 29(5): 057504    DOI: 10.1088/1674-1056/ab8219
Special Issue: Virtual Special Topic — Magnetism and Magnetic Materials
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Microstructure and ferromagnetism ofheavily Mn doped SiGe thin flims

Huanming Wang(王焕明)1, Sen Sun(孙森)2, Jiayin Xu(徐家胤)1, Xiaowei Lv(吕晓伟)3, Yuan Wang(汪渊)2, Yong Peng(彭勇)3, Xi Zhang(张析)1, Gang Xiang(向钢)1
1 College of Physics, Sichuan University, Chengdu 610064, China;
2 Key Laboratory of Radiation Physics and Technology, Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China;
3 Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 73000, China
Abstract  Heavily Mn-doped SiGe thin films were grown by radio frequency magnetron sputtering and then treated by post-growth thermal annealing. Structural characterizations reveal the coexistence of Mn-diluted SiGe crystals and Mn-rich nanoclusters in the annealed films. Magnetic measurements indicate the ferromagnetic ordering of the annealed samples above room temperature . The data suggest that the ferromagnetism is probably mainly contributed by the Ge-rich nanoclusters and partially contributed by the tensile-strained Mn-diluted SiGe crystals. The results may be useful for room temperature spintronic applications based on group IV semiconductors.
Keywords:  Mn-doped SiGe      diluted magnetic semiconductor      nanoclusters      ferromagnetism  
Received:  14 February 2020      Revised:  12 March 2020      Published:  05 May 2020
PACS:  75.50.Pp (Magnetic semiconductors)  
  78.40.Fy (Semiconductors)  
  75.75.-c (Magnetic properties of nanostructures)  
Fund: Project supported by the National Key R&D Program of China (Grant No. 2017YFB0405702) and the National Natural Science Foundation of China (Grant No. 51671137).
Corresponding Authors:  Yuan Wang, Gang Xiang     E-mail:  wyuan@scu.edu.cn;gxiang@scu.edu.cn

Cite this article: 

Huanming Wang(王焕明), Sen Sun(孙森), Jiayin Xu(徐家胤), Xiaowei Lv(吕晓伟), Yuan Wang(汪渊), Yong Peng(彭勇), Xi Zhang(张析), Gang Xiang(向钢) Microstructure and ferromagnetism ofheavily Mn doped SiGe thin flims 2020 Chin. Phys. B 29 057504

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