K and Mn co-doped BaCd2As2: A hexagonal structured bulk diluted magnetic semiconductor with large magnetoresistance
作者： Yongkang Luo , Zhu-An Xu , Jianhui Dai , Xiaojun Yang , Guanghan Cao
DOI: 10.1063/1.4842875
关键词: Magnetoresistance 、 Giant magnetoresistance 、 Coercivity 、 Tetragonal crystal system 、 Condensed matter physics 、 Ferromagnetism 、 Magnetization 、 Materials science 、 Curie temperature 、 Magnetic semiconductor
摘要: 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, Ba1−yKyCd2−xMnxAs2 system has a hexagonal CaAl2Si2-type structure with Cd2As2 layer forming honeycomb-like network. The concentration reaches up to x ∼ 0.4. Magnetization measurements show that samples undergo ferromagnetic transitions Curie temperature 16 K. With low coercive field of less than 10 Oe large magnetoresistance about −70%, structured can be served as promising candidate for spin manipulations.
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