Magnetic Evolution of Carrier Doping and Spin Dynamics in Diluted Magnetic Semiconductors (Ba,Na)(Zn,Mn)2As2

Guoqiang Zhao; Yipeng Cai; Kenji M. Kojima; Qi Sheng; James Beare; Graeme Luke; Xiang Li; Yi Peng; Timothy Ziman; Kan Zhao; Zheng Deng; Xiancheng Wang; Yongqing Li; Gang Su; Sadamichi Maekawa; Bo Gu; Yasutomo J. Uemura; Changqing Jin

doi:10.3390/condmat10020030

Magnetic Evolution of Carrier Doping and Spin Dynamics in Diluted Magnetic Semiconductors (Ba,Na)(Zn,Mn)₂As₂

Guoqiang Zhao, Yipeng Cai, Kenji M. Kojima, Qi Sheng, James Beare, Graeme Luke, Xiang Li, Yi Peng, Timothy Ziman, Kan Zhao, Zheng Deng, Xiancheng Wang, Yongqing Li, Gang Su, Sadamichi Maekawa, Bo Gu, Yasutomo J. Uemura, Changqing Jin

Single Crystal Diffraction

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

The investigation of novel diluted magnetic semiconductors (DMSs) provides a promising platform for studying magnetism and transport characteristics, with significant implications for spintronics. DMSs based on BaZn₂As₂ are particularly noteworthy due to their high Curie temperature (T_C) of 260 K, diverse magnetic states, and potential for multilayer heterojunctions. This study investigates the magnetic evolution of carrier doping and spin dynamics in the asperomagnet (Ba,Na)(Zn,Mn)₂As₂, utilizing a combination of magnetization measurements, ac susceptibility, and muon spin rotation (µSR). Key findings include the following: (1) lower transition temperatures and coercive forces in (Ba,Na)(Zn,Mn)₂As₂ compared to the ferromagnet (Ba,K)(Zn,Mn)₂As₂; (2) a dynamic fluctuation peak around the transition temperature observed in both the ac susceptibility and longitudinal field (LF) µSR; and (3) the coexistence of static and dynamic states at low temperatures, exhibiting spin-glass-like characteristics. This study, to the best of our knowledge, may represent the first investigation of asperomagnetic order utilizing µSR techniques. It enhances the understanding of magnetic interactions in BaZn₂As₂-based systems and provides valuable insights into the exploration of high T_C DMSs.

Original language	English
Article number	30
Journal	Condensed Matter
Volume	10
Issue number	2
DOIs	https://doi.org/10.3390/condmat10020030
State	Published - Jun 2025

Funding

This project was financially supported by National Key Research and Development Projects of China (Grant Nos. 2022YFA1405100 and 2022YFA1204100), the National Natural Science Foundation of China (Grants Nos. 12074378 and 61888102), and the Chinese Academy of Sciences (Grant Nos. YSBR-030, JZHKYPT-2021-08, and XDB33000000). SM is supported by JSPS KAKENHI grant No. JP24K00576. G. Q. Zhao has received partial support from the China Scholarship Council (No. 201904910900), the Plan of Assistant to Special Researcher at the University of Chinese Academy of Sciences (2022-PASR-202206), and the CAS Project for Young Scientists in Basic Research (2022YSBR-048). The work at Columbia was supported by US National Science Foundation with the grant DMR 2104661.

Keywords

diluted magnetic semiconductor
dynamic fluctuation
magnetic evolution

Access to Document

10.3390/condmat10020030

Cite this

Zhao, G., Cai, Y., Kojima, K. M., Sheng, Q., Beare, J., Luke, G., Li, X., Peng, Y., Ziman, T., Zhao, K., Deng, Z., Wang, X., Li, Y., Su, G., Maekawa, S., Gu, B., Uemura, Y. J., & Jin, C. (2025). Magnetic Evolution of Carrier Doping and Spin Dynamics in Diluted Magnetic Semiconductors (Ba,Na)(Zn,Mn)₂As₂. Condensed Matter, 10(2), Article 30. https://doi.org/10.3390/condmat10020030

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abstract = "The investigation of novel diluted magnetic semiconductors (DMSs) provides a promising platform for studying magnetism and transport characteristics, with significant implications for spintronics. DMSs based on BaZn2As2 are particularly noteworthy due to their high Curie temperature (TC) of 260 K, diverse magnetic states, and potential for multilayer heterojunctions. This study investigates the magnetic evolution of carrier doping and spin dynamics in the asperomagnet (Ba,Na)(Zn,Mn)2As2, utilizing a combination of magnetization measurements, ac susceptibility, and muon spin rotation (µSR). Key findings include the following: (1) lower transition temperatures and coercive forces in (Ba,Na)(Zn,Mn)2As2 compared to the ferromagnet (Ba,K)(Zn,Mn)2As2; (2) a dynamic fluctuation peak around the transition temperature observed in both the ac susceptibility and longitudinal field (LF) µSR; and (3) the coexistence of static and dynamic states at low temperatures, exhibiting spin-glass-like characteristics. This study, to the best of our knowledge, may represent the first investigation of asperomagnetic order utilizing µSR techniques. It enhances the understanding of magnetic interactions in BaZn2As2-based systems and provides valuable insights into the exploration of high TC DMSs.",

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AU - Sheng, Qi

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AU - Luke, Graeme

AU - Li, Xiang

AU - Peng, Yi

AU - Ziman, Timothy

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AU - Deng, Zheng

AU - Wang, Xiancheng

AU - Li, Yongqing

AU - Su, Gang

AU - Maekawa, Sadamichi

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N2 - The investigation of novel diluted magnetic semiconductors (DMSs) provides a promising platform for studying magnetism and transport characteristics, with significant implications for spintronics. DMSs based on BaZn2As2 are particularly noteworthy due to their high Curie temperature (TC) of 260 K, diverse magnetic states, and potential for multilayer heterojunctions. This study investigates the magnetic evolution of carrier doping and spin dynamics in the asperomagnet (Ba,Na)(Zn,Mn)2As2, utilizing a combination of magnetization measurements, ac susceptibility, and muon spin rotation (µSR). Key findings include the following: (1) lower transition temperatures and coercive forces in (Ba,Na)(Zn,Mn)2As2 compared to the ferromagnet (Ba,K)(Zn,Mn)2As2; (2) a dynamic fluctuation peak around the transition temperature observed in both the ac susceptibility and longitudinal field (LF) µSR; and (3) the coexistence of static and dynamic states at low temperatures, exhibiting spin-glass-like characteristics. This study, to the best of our knowledge, may represent the first investigation of asperomagnetic order utilizing µSR techniques. It enhances the understanding of magnetic interactions in BaZn2As2-based systems and provides valuable insights into the exploration of high TC DMSs.

AB - The investigation of novel diluted magnetic semiconductors (DMSs) provides a promising platform for studying magnetism and transport characteristics, with significant implications for spintronics. DMSs based on BaZn2As2 are particularly noteworthy due to their high Curie temperature (TC) of 260 K, diverse magnetic states, and potential for multilayer heterojunctions. This study investigates the magnetic evolution of carrier doping and spin dynamics in the asperomagnet (Ba,Na)(Zn,Mn)2As2, utilizing a combination of magnetization measurements, ac susceptibility, and muon spin rotation (µSR). Key findings include the following: (1) lower transition temperatures and coercive forces in (Ba,Na)(Zn,Mn)2As2 compared to the ferromagnet (Ba,K)(Zn,Mn)2As2; (2) a dynamic fluctuation peak around the transition temperature observed in both the ac susceptibility and longitudinal field (LF) µSR; and (3) the coexistence of static and dynamic states at low temperatures, exhibiting spin-glass-like characteristics. This study, to the best of our knowledge, may represent the first investigation of asperomagnetic order utilizing µSR techniques. It enhances the understanding of magnetic interactions in BaZn2As2-based systems and provides valuable insights into the exploration of high TC DMSs.

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