The magnetic, electronic and optical properties of HoRhGe

Sachin Gupta, K. G. Suresh, A. K. Nigam, Yu V. Knyazev, Yu I. Kuz'Min, A. V. Lukoyanov

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    Abstract

    The physical properties of polycrystalline HoRhGe have been studied experimentally and theoretically. The compound orders antiferromagnetically with a Néel temperature (TN) of 5.5K. It shows a large negative magnetoresistance (MR) of 25% at TN, for a field of 50kOe. However, at 2K and in lower fields, the MR is found to be positive with a magnitude of about 12%. The magnetocaloric effect has been estimated from both magnetization and heat capacity data and found to be large compared to many potential refrigerant materials in the same temperature range. The optical conductivity calculated theoretically from the ab initio results is in agreement with experimental values. The electronic structure calculations with the LSDA+U method accounting for the strong electronic correlations in the 4f shell of holmium show that the Ho 4f electronic states play a major role in determining its magnetic, electronic and optical properties.

    Original languageEnglish
    Article number365002
    JournalJournal of Physics D: Applied Physics
    Volume47
    Issue number36
    DOIs
    Publication statusPublished - 2014 Sep 10

    Keywords

    • electronic structures
    • magnetocaloric effect
    • magnetoresistance
    • optical properties

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Acoustics and Ultrasonics
    • Surfaces, Coatings and Films

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