Partially disordered phase in frustrated triangular lattice antiferromagnet CuFeO2

被引:98
作者
Mitsuda, S [1 ]
Kasahara, N [1 ]
Uno, T [1 ]
Mase, M [1 ]
机构
[1] Sci Univ Tokyo, Fac Sci, Dept Phys, Shinjuku Ku, Tokyo 1628601, Japan
关键词
CuFeO2; spin frustration; triangular lattice antiferromagnet; successive phase transition; neutron diffraction;
D O I
10.1143/JPSJ.67.4026
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We reinvestigated successive magnetic phase transitions (TN1 similar to 14.0 K, TN2 similar to 10.5 K) in a frustrated triangular lattice antiferromagnet (TLA) CuFeO2 by neutron diffraction measurements using single crystals. The magnetic structure of the intermediate temperature phase between TN1 and TN1 is found to be a quasi-long range ordered sinusoidally amplitude-modulated structure with a temperature dependent propagation wave vector (q q 0). These features of successive phase transitions are well explained by reinvestigated Monte-Carlo simulation of a 2D Ising TLA with competing exchange interactions up to 3rd neighbors, in spite of the Heisenberg spin character of orbital singlet Fe3+ magnetic ions.
引用
收藏
页码:4026 / 4029
页数:4
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