K and Mn co-doped BaCd2As2: A hexagonal structured bulk diluted magnetic semiconductor with large magnetoresistance
K and Mn co-doped BaCd2As2: A hexagonal structured bulk diluted magnetic semiconductor with large magnetoresistance
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DOI：
10.1063/1.4842875
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发表时间：
2013-11
影响因子：
3.2
通讯作者：
Xiaojun Yang;Yuke Li;Pan Zhang;Hao Jiang;Yongkang Luo;Qian Chen;C. Feng;C. Cao;J. Dai
中科院分区：
文献类型：
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作者：
Xiaojun Yang;Yuke Li;Pan Zhang;Hao Jiang;Yongkang Luo;Qian Chen;C. Feng;C. Cao;J. Dai
在 K 和 Mn 共掺杂 BaCd2As2 系统中发现了块状稀释磁性半导体。与最近报道的四方ThCr2Si2结构II-II-V基(Ba,K)(Zn,Mn)2As2不同，Ba1−yKyCd2−xMnxAs2体系具有六方CaAl2Si2型结构，其中Cd2As2层形成蜂窝状网络。 Mn浓度达到x∼0.4。磁化测量表明，样品在居里温度高达 16 K 的情况下发生铁磁转变。六方结构 Ba1−yKyCd2−xMnxAs2 具有小于 10 Oe 的低矫顽场和约 -70% 的大磁阻，可作为自旋操纵的有前途的候选者。
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 x ∼ 0.4. Magnetization measurements show that the samples undergo ferromagnetic transitions with Curie temperature up to 16 K. With low coercive field of less than 10 Oe and large magnetoresistance of about −70%, the hexagonal structured Ba1−yKyCd2−xMnxAs2 can be served as a promising candidate for spin manipulations.