Magnetic Excitations in the Geometric Frustrated Multiferroic CuCrO2
- ORNL
- Institute of Solid State & Semiconductor Physics, Minsk, Belarus
- Oak Ridge National Laboratory (ORNL)
- National Institute of Standards and Technology (NIST)
In this paper detailed neutron scattering measurements of the magnetic excitation spectrum of \CCO\ in the ordered state below $$T_{\rm{N1}}=24.2$$~K are presented. The spectra are analyzed using a model Hamiltonian which includes intralayer-exchange 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 in agreement with the structure proposed for \CCO\ 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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 1025841
- Journal Information:
- Physical Review B, Vol. 84, Issue 9; ISSN 1098--0121
- Country of Publication:
- United States
- Language:
- English
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