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掺杂对（BaRb）（ZnMn）As（0.1≤x，y≤0.25）中磁性和电子输运性质的影响

Doping Effects on Magnetic and Electronic Transport Properties in (BaRb)(ZnMn)As (0.1 ≤ x, y ≤ 0.25).

作者信息

Zhao Guoqiang, Peng Yi, Kojima Kenji M, Cai Yipeng, Li Xiang, Zhao Kan, Guo Shengli, Han Wei, Li Yongqing, Ning Fanlong, Wang Xiancheng, Gu Bo, Su Gang, Maekawa Sadamichi, Uemura Yasutomo J, Jin Changqing

机构信息

Kavli Institute for Theoretical Sciences (KITS), University of Chinese Academy of Sciences, Beijing 101408, China.

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

出版信息

Nanomaterials (Basel). 2025 Jun 23;15(13):975. doi: 10.3390/nano15130975.

DOI:10.3390/nano15130975
PMID:40648681
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12251130/
Abstract

Diluted magnetic semiconductors (DMSs) represent a significant area of interest for research and applications in spintronics. Recently, DMSs derived from BaZnAs have garnered significant interest due to the record Curie temperature () of 260 K. However, the influence of doping on their magnetic evolution and transport characteristics has not been thoroughly investigated. This study aims to fill this gap through susceptibility and magnetization measurements, electric transport analysis, and muon spin relaxation and rotation (µSR) measurements on (BaRb)(ZnMn)As (0.1 ≤ x, y ≤ 0.25, BRZMA). Key findings include the following: (1) BRZMA showed a maximum of 138 K, much lower than (Ba,K)(Zn,Mn)As, because of a reduced carrier concentration. (2) A substantial electromagnetic coupling is evidenced by a negative magnetoresistance of up to 34% observed in optimally doped BRZMA. (3) A 100% static magnetic ordered volume fraction is achieved in the low-temperature region, indicating a homogeneous magnet. (4) Furthermore, a systematic and innovative methodology has been initially proposed, characterized by clear step-by-step instructions aimed at enhancing , grounded in robust experimental findings. The findings presented provide valuable insights into the spin-charge interplay concerning magnetic and electronic transport properties. Furthermore, they offer clear direction for the investigation of higher DMSs.

摘要

稀磁半导体（DMSs）是自旋电子学研究和应用中一个重要的研究领域。最近，源自BaZnAs的DMSs因其260 K的居里温度记录（）而备受关注。然而，掺杂对其磁演化和输运特性的影响尚未得到充分研究。本研究旨在通过对（BaRb）（ZnMn）As（0.1≤x，y≤0.25，BRZMA）进行磁化率和磁化强度测量、电输运分析以及μ子自旋弛豫和旋转（µSR）测量来填补这一空白。主要发现如下：（1）由于载流子浓度降低，BRZMA的居里温度最高为138 K，远低于（Ba，K）（Zn，Mn）As。（2）在最佳掺杂的BRZMA中观察到高达34%的负磁阻，这证明了存在显著的电磁耦合。（3）在低温区域实现了100%的静态磁有序体积分数，表明是均匀磁体。（4）此外，最初还提出了一种系统且创新的方法，其特点是有清晰的逐步指导说明，旨在提高居里温度，该方法基于可靠的实验结果。所呈现的研究结果为磁和电子输运性质的自旋 - 电荷相互作用提供了有价值的见解。此外，它们为研究更高居里温度的DMSs提供了明确的方向。

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