Field-induced anisotropic magnetic phase transitions and tricritical phenomena in GdCr6Ge6

被引:0
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作者
Zan Du [1 ,2 ]
Azizur Rahman [3 ]
Jiangpeng Song [4 ,5 ]
Jun Zhao [1 ,2 ]
Wei Liu [4 ]
Jiyu Fan [6 ]
Chunlan Ma [7 ]
Min Ge [2 ]
Yimin Xiong [8 ,9 ]
Li Pi [1 ,2 ]
Lei Zhang [1 ,10 ]
Yuheng Zhang [1 ,2 ,10 ]
机构
[1] High Magnetic Field Laboratory of Anhui Province
[2] Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Hefei Institutes of Physical Science,Chinese Academy of Sciences
[3] Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China
[4] Department of Physics, University of Science and Technology of China
[5] Institutes of Physical Science and Information Technology, Anhui University
[6] Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University
[7] Department of Applied Physics, Nanjing University of Aeronautics and Astronautics
[8] Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology,Suzhou University of Science and Technology
[9] Department of Physics, School of Physics and Optoelectronics Engineering, Anhui University
[10] Hefei National Laboratory
基金
中国国家自然科学基金;
关键词
D O I
暂无
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The interaction between complex magnetic structures and non-trivial band structures in ternary rare-earth GdCr6Ge6induces exotic and abundant electro-magnetic phenomena. In this work, we perform a systematical investigation on critical behaviors and magnetic properties of the single-crystal GdCr6Ge6. The temperature, field, and angle dependence of magnetization unveils strong magnetic anisotropy along the c-axis and isotropic characteristic in the ab-plane. Critical exponents β = 0.252(1), γ =0.905(9), δ = 4.606(3) for H//ab, and β = 0.281(3), γ = 0.991(8), δ = 4.541(5) for H//c are obtained by the modified Arrott plot method(MAP) and critical isotherm(CI) analysis. The determined exponents for both directions are consistent with the theoretical prediction of a tricritical mean-field model. Based on detailed magnetization measurements and universality scaling, comprehensive magnetic phase diagrams of GdCr6Ge6for H//ab and H//c are constructed, which reveal that the external field induces a ferromagnetic(FM) transition for H//ab while a ferrimagnetic(FIM) one for H//c. Two tricritical points are determined for H//ab(11.2 K, 266.3 Oe) and H//c(11.3 K, 3.3 kOe) on the phase diagrams, respectively. The field-induced anisotropic magnetic configurations and multiple phases are clarified, where the moments of Gd and Cr form FM coupling for H//ab while FIM one for H//c via the interaction between Gd and Cr sublattices.
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页码:113 / 122
页数:10
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