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

被引：20

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.

引用

页数：5

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