Vibrational properties of Vanadium and Zirconium based metal hydrides

DOI

Inelastic neutron scattering has proven to be reliable tool to investigate the phonon structure of hydrides. E.g., it was shown that the vibrational structure of Ca(BH4)2 has a large impact on the entropy of the system and thus changes the stability of hydride. In intermetallic hydrides, hydrogen is absorbed as a lattice gas with negligible covalent binding to the metal atoms. In a simplified picture, hydrogen on an interstitial site feels a harmonic potential giving vibration energies of the order of 100 meV. The vibrations of hydrogen in a local potential translate into optical phonons of the hydride lattice. The acoustic phonons occur at low energies only and were neglected in the past [6]. It is aim of this project of measuring the INS spectra of various V and Zr based IMC hydrides as archetypical compounds to be used as high pressures.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24088242
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24088242
Provenance
Creator Dr Anibal Ramirez-Cuesta; Dr Andreas Borgschulte; Dr Elsa Callini; Miss Deborah Durbin
Publisher ISIS Neutron and Muon Source
Publication Year 2014
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2011-10-30T18:45:23Z
Temporal Coverage End 2011-11-28T13:54:43Z