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arXiv · 1311.6097

K and Mn co-doped BaCd2As2: a hexagonal structured bulk diluted magnetic semiconductor with large magnetoresistance

Xiaojun Yang·Yuke Li·Pan Zhang·Hao Jiang·Yongkang Luo·Qian Chen·Chunmu Feng·Chao Cao·Jianhui Dai·Qian Tao·Guanghan Cao·Zhu-an Xu
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Abstract

A bulk diluted magnetic semiconductor was found in the K and Mn co-doped BaCd2As2 system. Different from recently reported tetragonal ThCr2Si2-structured II-II-V based(Ba,K)(Zn,Mn)2As2, the Ba1-yKyCd2-xMnxAs2 system has a hexagonal CaAl2Si2-type structure with the Cd2As2 layer forming a honeycomb-like network. The Mn concentration reaches up to its x ? 0.4. Magnetization measurements show that the samples undergo ferromagnetic transitions with Curie temperature up to 16 K. With low coercive field less than 10 Oe and large magnetoresistence of about -70%, the hexagonal structured Ba1-yKyCd2-xMnxAs2 can be served as a promising candidate for spin manipulations.

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Xiaojun Yang, Yuke Li, Pan Zhang, Hao Jiang, Yongkang Luo, Qian Chen, Chunmu Feng, Chao Cao, Jianhui Dai, Qian Tao, Guanghan Cao, Zhu-an Xu. 2013-11-24. K and Mn co-doped BaCd2As2: a hexagonal structured bulk diluted magnetic semiconductor with large magnetoresistance. https://doi.org/10.1063/1.4842875

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