Critical behavior in the itinerant ferromagnet SmMn2Ge2

doi:10.1088/1674-1056/accb49

中国物理B ›› 2023, Vol. 32 ›› Issue (8): 87501-087501.doi: 10.1088/1674-1056/accb49

Critical behavior in the itinerant ferromagnet SmMn₂Ge₂

Qingyi Hou(侯清漪)^1,2,†, Meng Song(宋猛)^1,2,†, Xitong Xu(许锡童)¹, Yihao Wang(王宜豪)¹, Chao Dong(董超)³, Yinfa Feng(冯寅发)³, Miao He(何苗)^1,2, Yonglai Liu(刘永来)^1,2, Liang Cao(曹亮)¹, Junfeng Wang(王俊峰)³, Zhe Qu(屈哲)^1,2,‡, and Yimin Xiong(熊奕敏)^4,5,§

1. Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, High Magnetic Field Laboratory of Chinese Academy of Sciences(CHMFL), HFIPS, Chinese Academy of Sciences, Hefei 230031, China;
2. Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, China;
3. Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;
4. Department of Physics, School of Physics and Optoelectronics Engineering, Anhui University, Hefei 230601, China;
5. Hefei National Laboratory, Hefei 230028, China

收稿日期:2023-02-11 修回日期:2023-03-23 接受日期:2023-04-07 发布日期:2023-07-26
通讯作者: Zhe Qu, Yimin Xiong E-mail:zhequ@hmfl.ac.cn;yxiong@ahu.edu.cn
基金资助:
This work was supported by the National Key Research and Development Program of China (Grant No.2021YFA1600204), the Innovation Program for Quantum Science and Technology (Grant No.2021ZD0302802), the National Natural Science Foundation of China (Grant Nos.U1832214, U2032213, 12104461, and 12074135), and the High Magnetic Field Laboratory of Anhui. Y. X. was supported by the Start-up Project of Anhui University (Grant No.S020318001/020).

Critical behavior in the itinerant ferromagnet SmMn₂Ge₂

1. Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, High Magnetic Field Laboratory of Chinese Academy of Sciences(CHMFL), HFIPS, Chinese Academy of Sciences, Hefei 230031, China;
2. Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, China;
3. Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;
4. Department of Physics, School of Physics and Optoelectronics Engineering, Anhui University, Hefei 230601, China;
5. Hefei National Laboratory, Hefei 230028, China

Received:2023-02-11 Revised:2023-03-23 Accepted:2023-04-07 Published:2023-07-26
Contact: Zhe Qu, Yimin Xiong E-mail:zhequ@hmfl.ac.cn;yxiong@ahu.edu.cn
Supported by:
This work was supported by the National Key Research and Development Program of China (Grant No.2021YFA1600204), the Innovation Program for Quantum Science and Technology (Grant No.2021ZD0302802), the National Natural Science Foundation of China (Grant Nos.U1832214, U2032213, 12104461, and 12074135), and the High Magnetic Field Laboratory of Anhui. Y. X. was supported by the Start-up Project of Anhui University (Grant No.S020318001/020).

摘要/Abstract

摘要： Transition metal and rare earth intermetallics have been a fertile playground for research of various quantum states. We report detailed magnetic studies on SmMn₂Ge₂, an anisotropic itinerant magnet with multiple magnetic phases. The critical behavior of the ferromagnetic phase transition is investigated by employing the modified Arrott plot with the Kouvel-Fisher method. The critical temperature TC is determined to be around 342.7 K with critical exponents of β =0.417 and γ=1.122, and the interaction function is found to be J(r)～ r^-4.68, suggesting the coexistence of long-range and short-range magnetic interactions. Our results contribute to the understanding of complex magnetism in SmMn₂Ge₂, which may provide fundamental guidance in future spintronic applications.

关键词: critical exponent, itinerant ferromagnet, rare earth

Abstract: Transition metal and rare earth intermetallics have been a fertile playground for research of various quantum states. We report detailed magnetic studies on SmMn₂Ge₂, an anisotropic itinerant magnet with multiple magnetic phases. The critical behavior of the ferromagnetic phase transition is investigated by employing the modified Arrott plot with the Kouvel-Fisher method. The critical temperature TC is determined to be around 342.7 K with critical exponents of β =0.417 and γ=1.122, and the interaction function is found to be J(r)～ r^-4.68, suggesting the coexistence of long-range and short-range magnetic interactions. Our results contribute to the understanding of complex magnetism in SmMn₂Ge₂, which may provide fundamental guidance in future spintronic applications.

Key words: critical exponent, itinerant ferromagnet, rare earth

中图分类号: (Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.))

75.40.Cx

75.20.En (Metals and alloys) 75.30.Gw (Magnetic anisotropy)

Qingyi Hou(侯清漪), Meng Song(宋猛), Xitong Xu(许锡童), Yihao Wang(王宜豪), Chao Dong(董超), Yinfa Feng(冯寅发), Miao He(何苗), Yonglai Liu(刘永来), Liang Cao(曹亮), Junfeng Wang(王俊峰), Zhe Qu(屈哲), and Yimin Xiong(熊奕敏). Critical behavior in the itinerant ferromagnet SmMn₂Ge₂[J]. 中国物理B, 2023, 32(8): 87501-087501.

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Critical behavior in the itinerant ferromagnet SmMn₂Ge₂

Critical behavior in the itinerant ferromagnet SmMn₂Ge₂

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