Transparent magnetic semiconductor with embedded metallic glass nano-granules

Publication date: 15 October 2017
Source:Materials & Design, Volume 132
Author(s): Na Chen, Hongping Li, Akihiko Hirata, Zhaochu Luo, Zhongchang Wang, Wenjian Liu, Bin Cui, Taro Hitosugi, Lin Gu, Xiaozhong Zhang, Xianmin Zhang, Cheng Song, Xiangrong Wang, Lijuan Zhang, Jiefeng Cao, Kazuyo Ohmura, Sergey V. Ketov, Kefu Yao, Mingwei Chen, Dmitri V. Louzguine-Luzgin
One central material issue in spintronics is the search for high temperature (above room temperature) magnetic semiconductors. We report on the formation of a transparent magnetic semiconductor with embedded ferromagnetic metallic glass nano-granules, showing a Curie temperature of ~600K. Soft X-ray magnetic circular dichroism data verify its intrinsic room-temperature ferromagnetism. Owing to the unique structure of ferromagnetic nano-granules embedded in the host magnetic semiconductor, additional interfacial exchange anisotropy emerges and stabilizes the ferromagnetism. The magnetotransport measurements of the amorphous nanocomposite indicate that its anomalous Hall effect is dominated by the extrinsic mechanism of the side-jump due to the spin-dependent impurity.

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