Transparent magnetic semiconductor with embedded metallic glass nano-granules

Transparent magnetic semiconductor with embedded metallic glass nano-granules
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嵌入金属玻璃纳米颗粒的透明磁性半导体

DOI:
10.1016/j.matdes.2017.07.010
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发表时间:
2017-10
影响因子:
8.4
通讯作者:
Ca
Ca
中科院分区:
材料科学1区
文献类型:
--
作者:
Chen Na;Luo Zhaochu;Liu Wenjian;Cui Bin;Zhang Xiaozhong;Song Cheng;Yao Kefu;Li Hongping;Hirata Akihiko;Wang Zhongchang;Hitosugi Taro;Zhang Xianmin;Ketov Sergey V.;Chen Mingwei;Louzguine-Luzgin Dmitri V.;Gu Lin;Wang Xiangrong;Wang Xiangrong;Zhang Lijuan;Ca

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自旋电子学的一个核心材料问题是寻找高温(高于室温)磁性半导体。我们报道了一种嵌入铁磁金属玻璃纳米颗粒的透明磁性半导体的形成,其居里温度为~ 600 K。软X射线磁性圆二色性数据验证了其内在的室温铁磁性。由于铁磁纳米颗粒嵌入在主体磁性半导体中的独特结构,额外的界面交换各向异性出现并稳定铁磁性。非晶纳米复合材料的磁输运测量表明,其反常霍尔效应是由自旋相关杂质引起的侧跳的非本征机制所主导的。
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 ~ 600 K. 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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