Spin-phonon interaction in transition-metal difluoride antiferromagnets: Theory and experiment
Department of Physics and Astronomy, University of Western Ontario, London, Ontario, Canada N6A 3K7
Measurement Science and Standards, National Research Council, Ottawa, Ontario, Canada K1A 0R6
Received July 26, 2018, published online November 26, 2018
An overall comparative study is made of the spin-phonon interactions in several rutile-structure transition-metal difluorides, specifically FeF2, MnF2, NiF2, and CoF2, in terms of recent developments obtained experimentally using inelastic light scattering spectroscopy and theoretically using a modified mean-field approach to estimate spin-pair correlation functions. New experimental data are presented here and interpreted within an extend-ed and comprehensive theoretical treatment to yield estimates for the spin-phonon coupling coefficients and the relative magnitudes of the magneto-optical coupling coefficients.
Key words: antiferromagnets, spin-phonon coupling, rutile structure, magneto-optical coupling, Raman spectroscopy.