Spin-lattice coupling in iron jarosite

A. J. C. Buurma, I. P. Handayani, N. Mufti, G. R. Blake, P. H. M. van Loosdrecht, T. T. M. Palstra

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    Abstract

    We have studied the magnetoelectric coupling of the frustrated triangular antiferromagnet iron jarosite using Raman spectroscopy, dielectric measurements and specific heat. Temperature dependent capacitance measurements show an anomaly in the dielectric constant at TN. Specific heat data indicate the presence of a low frequency Einstein mode at low temperature. Raman spectroscopy confirms the presence of a new mode below TN that can be attributed to folding of the Brillouin zone. This mode shifts and sharpens below TN. We evaluate the strength of the magnetoelectric coupling using the symmetry unrestricted biquadratic magnetoelectric terms in the free energy.
    Original languageEnglish
    Pages (from-to)50-54
    JournalJournal of solid state chemistry
    Volume195
    DOIs
    Publication statusPublished - Nov 2012

    Keywords

    • Jarosite
    • Phonon mode
    • Frustrated triangular antiferromagnet

    Cite this

    Buurma, A. J. C., Handayani, I. P., Mufti, N., Blake, G. R., van Loosdrecht, P. H. M., & Palstra, T. T. M. (2012). Spin-lattice coupling in iron jarosite. Journal of solid state chemistry, 195, 50-54. https://doi.org/10.1016/j.jssc.2012.03.011