DOI > 10.5291/ILL-DATA.7-01-374

This proposal is publicly available since 05/06/2018

Title

Lattice dynamics in MxV2Al20 compounds

Abstract

We wish to continue the investigations on the lattice dynamics of the MxV2Al20 compounds started on IN4 and IN6. We have found in Al0.3V2Al20 a low energy (2meV at T=2K) optical phonon band that exhibits a strong anharmonicity evidenced by threefold increase of characteristic energy on heating up to 300K. In other compounds M=Y, La, Ce, Sc the (x=1) the low energy mode is absent and quasi-harmonic lattice dynamics prevails. The continuation aims to complete the data and to improve the data quality for optimal comparison with ab-initio calculated phonon response.

Experimental Report

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Data Citation

The recommended format for citing this dataset in a research publication is in the following format:

MUTKA Hannu; GRIN Yuri; HIROI Z. and KOZA Michael Marek. (2013). Lattice dynamics in MxV2Al20 compounds. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-01-374

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Metadata

Experiment Parameters

  • Environment temperature

    1.5 to 320 ±0.1

  • Experiment energy

    2 to 3.5 Å

  • Experiment moment

    <4 1/Å

  • Experiment res energy

    best possible

Sample Parameters

  • Formula

    • MxV2Al20 M=Al, Ga, Sc, Y, La, Ce

  • Consistence

    polycristalline

  • Mass

    5000 ...10000

  • Space

    Fd-3m

  • Unit cell A

    14.5

  • Unit cell B

    14.5

  • Unit cell C

    14.5

  • Alpha

    90

  • Beta

    90

  • Gamma

    90

  • Container

    Al foil bag

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