Spin-driven bond order in a 1/5-magnetization plateau phase in the triangular lattice antiferromagnet CuFeO2

被引：13
|
作者：
Nakajima, Taro [1 ]
Terada, Noriki [2 ,3 ]
Mitsuda, Setsuo [1 ]
Bewley, Robert [3 ]
机构：
[1] Tokyo Univ Sci, Fac Sci, Dept Phys, Tokyo 1628601, Japan
[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
[3] Rutherford Appleton Lab, ISIS Facil, Sci & Technol Facil Council, Didcot OX11 0QX, Oxon, England
来源：
PHYSICAL REVIEW B | 2013年 / 88卷 / 13期
基金：
日本学术振兴会;
关键词：
PARTIALLY DISORDERED PHASE; DISTORTION;
D O I：
10.1103/PhysRevB.88.134414
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have investigated spin-wave excitations in a magnetic-field-induced 1/5-magnetization plateau phase in the triangular lattice antiferromagnet CuFeO2 (CFO), by means of inelastic neutron-scattering measurements under applied magnetic fields of up to 13.4 T. Comparing the observed spectra with the calculations in which spin-lattice coupling effects for the nearest-neighbor exchange interactions are taken into account, we have determined the Hamiltonian parameters in the field-induced 1/5-plateau phase, which directly show that CFO exhibits a bond order associated with the magnetic structure in this phase.
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页数：5
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