Microstructure and ferromagnetism of heavily Mn doped SiGe thin flims

doi:10.1088/1674-1056/ab8219

中国物理B ›› 2020, Vol. 29 ›› Issue (5): 57504-057504.doi: 10.1088/1674-1056/ab8219

所属专题： Virtual Special Topic — Magnetism and Magnetic Materials

Microstructure and ferromagnetism of heavily Mn doped SiGe thin flims

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)

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

收稿日期:2020-02-14 修回日期:2020-03-12 出版日期:2020-05-05 发布日期:2020-05-05
通讯作者: Yuan Wang, Gang Xiang E-mail:wyuan@scu.edu.cn;gxiang@scu.edu.cn
基金资助:
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).

Microstructure and ferromagnetism of heavily 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

Received:2020-02-14 Revised:2020-03-12 Online:2020-05-05 Published:2020-05-05
Contact: Yuan Wang, Gang Xiang E-mail:wyuan@scu.edu.cn;gxiang@scu.edu.cn
Supported by:
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).

摘要/Abstract

摘要： 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.

关键词: Mn-doped SiGe, diluted magnetic semiconductor, nanoclusters, ferromagnetism

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.

Key words: Mn-doped SiGe, diluted magnetic semiconductor, nanoclusters, ferromagnetism

中图分类号: (Magnetic semiconductors)

75.50.Pp

78.40.Fy (Semiconductors) 75.75.-c (Magnetic properties of nanostructures)

王焕明, 孙森, 徐家胤, 吕晓伟, 汪渊, 彭勇, 张析, 向钢. Microstructure and ferromagnetism of heavily Mn doped SiGe thin flims[J]. 中国物理B, 2020, 29(5): 57504-057504.

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 of heavily Mn doped SiGe thin flims[J]. Chin. Phys. B, 2020, 29(5): 57504-057504.

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Microstructure and ferromagnetism of heavily Mn doped SiGe thin flims

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