Partially disordered state and spin-lattice coupling in an S=3/2 triangular lattice antiferromagnet Ag2CrO2

被引：19
|
作者：
Matsuda, M. [1 ]
de la Cruz, C. [1 ]
Yoshida, H. [2 ]
Isobe, M. [2 ]
Fishman, R. S. [3 ]
机构：
[1] Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA
[2] Natl Inst Mat Sci NIMS, Tsukuba, Ibaraki 3050044, Japan
[3] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA
来源：
PHYSICAL REVIEW B | 2012年 / 85卷 / 14期
关键词：
HEISENBERG-ANTIFERROMAGNET; PYROCHLORE ANTIFERROMAGNET; MAGNETIC-STRUCTURE; PHASE-TRANSITION; LIQUID; DIFFRACTION; ORDER;
D O I：
10.1103/PhysRevB.85.144407
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ag2CrO2 is an S = 3/2 frustrated triangular lattice antiferromagnet without an orbital degree of freedom. With decreasing temperature, a four-sublattice spin state develops. However, a long-range partially disordered state with five sublattices abruptly appears at T-N = 24 K, accompanied by a structural distortion, and persists at least down to 2 K. The spin-lattice coupling stabilizes the anomalous state, which is expected to appear only in limited ranges of further-neighbor interactions and temperature. It was found that the spin-lattice coupling is a common feature in triangular lattice antiferromagnets with multiple-sublattice spin states, since the triangular lattice is elastic.
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页数：5
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