Počet záznamů: 1  

Impact of magnetic and antisite disorder on the vibrational densities\nof states in Ni2 MnSn Heusler alloys

  1. 1.
    0565214 - ÚFM 2023 RIV US eng J - Článek v odborném periodiku
    Miroshkina, O. N. - Eggert, B. - Lill, J. - Beckmann, B. - Koch, D. - Hu, M. Y. - Lojewski, T. - Rauls, S. - Scheibel, F. - Taubel, A. - Šob, Mojmír - Ollefs, K. - Gutfleisch, O. - Wende, H. - Gruner, M.E. - Friák, Martin
    Impact of magnetic and antisite disorder on the vibrational densities
    of states in Ni2 MnSn Heusler alloys.
    Physical Review B. Roč. 106, č. 21 (2022), č. článku 214302. ISSN 2469-9950. E-ISSN 2469-9969
    Grant CEP: GA ČR(CZ) GA20-16130S
    Institucionální podpora: RVO:68081723
    Klíčová slova: vibrational density of states * Heusler alloys * magnetic disorder
    Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
    Impakt faktor: 3.7, rok: 2022
    Způsob publikování: Omezený přístup
    https://journals.aps.org/prb/abstract/10.1103/PhysRevB.106.214302

    We have performed a combined experimental and theoretical investigation of the vibrational properties of
    Ni 2 MnSn Heusler alloys. Sn-partial vibrational density of states (VDOS) of 119 Sn was measured by nuclear
    resonant inelastic x-ray scattering at temperatures of 15 and 300 K, while magnetism and local environment of
    Sn was resolved by 119 Sn Mössbauer spectroscopy. Using density functional theory, we associate the peaks
    in the VDOS with particular features in the element-resolved phonon dispersion of L2 1 ordered Ni 2 MnSn.
    The good agreement between theory and experiment in the low-energy region provides the evidence that the
    inversion of optical modes at involving the displacement of Ni and the heavier main group element atoms,
    which was predicted previously for other Ni-Mn-based Heusler compounds, is also a characteristic property of
    Ni 2 MnSn. Introducing different types of magnetic and antisite disorder in our calculations results in a distinctive
    redistribution and broadening of the Sn-VDOS, suggesting that considering partial disorder further improves the
    agreement with the experiment in particular at the highest phonon energies
    Trvalý link: https://hdl.handle.net/11104/0336796

     
     
Počet záznamů: 1  

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