Absence of long-range order in an XY pyrochlore antiferromagnet Er2AlSbO7

被引：6
作者：
Che, H. L. [1 ,2 ]
Zhao, Z. Y. [3 ]
Rao, X. [1 ,2 ]
Chu, L. G. [1 ,2 ]
Li, N. [1 ,2 ]
Chu, W. J. [1 ,2 ]
Gao, P. [1 ,2 ]
Yue, X. Y. [4 ]
Zhou, Y. [4 ]
Li, Q. J. [5 ]
Huang, Q. [6 ]
Choi, E. S. [7 ]
Han, Y. Y. [8 ]
He, Z. Z. [3 ]
Zhou, H. D. [6 ,7 ]
Zhao, X. [9 ]
Sun, X. F. [1 ,2 ,4 ,10 ]
机构：
[1] Univ Sci & Technol China, Dept Phys, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
[2] Univ Sci & Technol China, Key Lab Strongly Coupled Quantum Matter Phys CAS, Hefei 230026, Anhui, Peoples R China
[3] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China
[4] Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230601, Anhui, Peoples R China
[5] Anhui Univ, Sch Phys & Mat Sci, Inst Phys Sci & Informat Technol, Hefei 230601, Anhui, Peoples R China
[6] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
[7] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA
[8] Chinese Acad Sci, High Magnet Field Lab, Hefei 230031, Anhui, Peoples R China
[9] Univ Sci & Technol China, Sch Phys Sci, Hefei 230026, Anhui, Peoples R China
[10] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China
来源：
PHYSICAL REVIEW MATERIALS | 2020年 / 4卷 / 05期
基金：
美国国家科学基金会; 中国国家自然科学基金;
关键词：
EARTH;
D O I：
10.1103/PhysRevMaterials.4.054406
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Rare-earth pyrochlores are known to exhibit exotic magnetic phenomena. We report a study of crystal growth and characterizations of a new rare-earth compound Er2AlSbO7, in which Al3+ and Sb5+ ions share the same positions with a random distribution. The magnetism is studied by magnetic susceptibility, specific heat, and thermal conductivity measurements at low temperatures down to several tens of millikelvin. Different from the other reported Er-based pyrochlores exhibiting distinct magnetically ordered states, a spin-freezing transition is detected in Er2AlSbO7 below 0.37 K, which is primarily ascribed to the inherent structural disorder. A cluster spin-glass state is proposed in view of the frequency dependence of the peak position in the ac susceptibility. In addition, the temperature and field dependence of thermal conductivity indicates rather strong spin fluctuations which is probably due to the phase competition.
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页数：9
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