Spin-driven bond order in a 15-magnetization plateau phase in the triangular lattice antiferromagnet CuFeO2

Taro Nakajima, Noriki Terada, Setsuo Mitsuda, Robert Bewley

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Abstract

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.

Original languageEnglish
Article number134414
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume88
Issue number13
DOIs
Publication statusPublished - 17 Oct 2013

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