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.
@article{arxiv.1311.6097,
title = {K and Mn co-doped BaCd2As2: a hexagonal structured bulk diluted magnetic semiconductor with large magnetoresistance},
author = {Xiaojun Yang and Yuke Li and Pan Zhang and Hao Jiang and Yongkang Luo and Qian Chen and Chunmu Feng and Chao Cao and Jianhui Dai and Qian Tao and Guanghan Cao and Zhu-an Xu},
journal= {arXiv preprint arXiv:1311.6097},
year = {2014}
}