Peng Yi, Shi Luchuan, Zhao Guoqiang, Zhang Jun, Zhao Jianfa, Wang Xiancheng, Deng Zheng, Jin Changqing
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
School of Physics, University of Chinese Academy of Sciences, Beijing 101408, China.
Nanomaterials (Basel). 2024 Jan 25;14(3):263. doi: 10.3390/nano14030263.
Diluted magnetic semiconductors (DMSs) with tunable ferromagnetism are among the most promising materials for fabricating spintronic devices. Some DMS systems have sizeable magnetoresistances that can further extend their applications. Here, we report a new DMS Rb(ZnLiMn)As with a quasi-two-dimensional structure showing sizeable anisotropies in its ferromagnetism and transverse magnetoresistance (MR). With proper charge and spin doping, single crystals of the DMS display Curie temperatures up to 24 K. Analysis of the critical behavior via Arrott plots confirms the long-range ferromagnetic ordering in the Rb(ZnLiMn)As single crystals. We observed remarkable intrinsic MR effects in the single crystals (i.e., a positive MR of 85% at 0.4 T and a colossal negative MR of -93% at 7 T).
具有可调铁磁性的稀磁半导体（DMSs）是制造自旋电子器件最有前景的材料之一。一些DMS系统具有可观的磁电阻，这可以进一步拓展其应用。在此，我们报道了一种新型的具有准二维结构的DMS Rb(ZnLiMn)As，其在铁磁性和横向磁电阻（MR）方面表现出可观的各向异性。通过适当的电荷和自旋掺杂，该DMS单晶的居里温度高达24K。通过阿罗特图对临界行为的分析证实了Rb(ZnLiMn)As单晶中的长程铁磁有序。我们在单晶中观察到了显著的本征MR效应（即，在0.4T时正MR为85%，在7T时巨大的负MR为-93%）。
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