Magnetic Excitations in the Geometric Frustrated Multiferroic CuCrO2

Published

September 28, 2011

Author(s)

M. Frontzek, J. T. Haraldsen, A. Podlesnyak, M. Matsuda, A. D. Christianson, R. S. Fishman, A. S. Sefat, Yiming Qiu, John R. Copley, S. Barilo, S. V. Shiryaev, G. Ehlers

Abstract

In this paper detailed neutron scattering measurements of the magnetic excitation spectrum of CuCrO6d2^ in the ordered state below T_N1 = 24.2 K are presented. The spectra are analyzed using a model Hamiltonian which includes interlayer-exchanged up to the next-next nearest neighbor and interlayer exchange. We obtain a definite parameter set and show that exchange interaction terms beyond the next-nearest neighbor are important to describe the inelastic excitation spectrum. The magnetic ground state structure generated with our parameter set is an agreement with the structure proposed for CuCrO₂ from the results of single crystal diffraction experiments previously published. We argue that the role of the interlayer exchange is crucial to understand the incommensurability of the magnetic structure as well as the spin-charge coupling mechanism.

Citation

Physical Review B

Volume

84

Issue

9

Pub Type

Journals

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Keywords

neutron scattering, magnetic excitation spectrum, geometric frustrated multiferroic, CuCrO2, interlayer exchange, magnetic structure incommensurability

Citation

Frontzek, M. , Haraldsen, J. , Podlesnyak, A. , Matsuda, M. , Christianson, A. , Fishman, R. , Sefat, A. , Qiu, Y. , Copley, J. , Barilo, S. , Shiryaev, S. and Ehlers, G. (2011), Magnetic Excitations in the Geometric Frustrated Multiferroic CuCrO₂, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=909083 (Accessed September 10, 2024)