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

Article

关键词: HEISENBERG-ANTIFERROMAGNET;    PYROCHLORE ANTIFERROMAGNET;    MAGNETIC-STRUCTURE;    PHASE-TRANSITION;    LIQUID;    DIFFRACTION;    ORDER;   

DOI  :  10.1103/PhysRevB.85.144407

来源: SCIE

【 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.

【 授权许可】

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