Magnetic Ground States of the Rare-Earth Tripod Kagome Lattice Mg2RE3Sb3O14 (RE = Gd,Dy,Er)

被引：76

作者：

Dun, Z. L. ^{[1
]}

Trinh, J. ^{[2
]}

Li, K. ^{[3
,4
]}

Lee, M. ^{[5
,6
]}

Chen, K. W. ^{[6
]}

Baumbach, R. ^{[6
]}

Hu, Y. F. ^{[3
]}

Wang, Y. X. ^{[3
]}

Choi, E. S. ^{[6
]}

Shastry, B. S. ^{[2
]}

Ramirez, A. P. ^{[2
]}

Zhou, H. D. ^{[1
,6
]}

机构：

[1] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[2] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA

[3] Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China

[4] Ctr High Pressure Sci & Technol Adv Res, Beijing 100094, Peoples R China

[5] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

[6] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 15期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

TRIANGULAR-LATTICE; FRUSTRATED MAGNETS; SPIN ICE; PYROCHLORE; PR; ND; ANTIFERROMAGNETS; FAMILY; ORDER; MODEL;

D O I：

10.1103/PhysRevLett.116.157201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the structural and magnetic properties of a new compound family, Mg2RE3Sb3O14 (RE = Gd, Dy, Er), with a hitherto unstudied frustrating lattice, the "tripod kagome" structure. Susceptibility (ac, dc) and specific heat exhibit features that are understood within a simple Luttinger-Tisza-type theory. For RE = Gd, we found long-ranged order (LRO) at 1.65 K, which is consistent with a 120 degrees structure, demonstrating the importance of diople interactions for this 2D Heisenberg system. For RE = Dy, LRO at 0.37 K is related to the "kagome spin ice" physics for a 2D system. This result shows that the tripod kagome structure accelerates the transition to LRO predicted for the related pyrochlore systems. For RE = Er, two transitions, at 80 mK and 2.1 K are observed, suggesting the importance of quantum fluctuations for this putative XY system.

引用

页数：5

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