Volume 151, 2011

YMn2Hx and RMn2−yFeyH6 (R = Y, Er) studied by Raman, infrared and inelastic neutron scattering spectroscopies

Abstract

YMn2 forms either interstitial YMn2Hxhydrides for x ≤ 4.5 or a complex YMn2H6 hydride when submitted to high hydrogen pressure. These compounds have been studied by inelastic neutron scattering (INS) in order to clarify the different modes of H vibration. The INS spectra of YMn2Hxhydrides are strongly dependent on the H content. YMn2H6 and YMn2D6 show broad bands, also observed by Raman and IR spectroscopy, assigned to H–Mn–H (or D) and Mn–H bending and stretching modes. Both ErMn2D6 and ErMn1.8Fe0.2D6 show, in addition to the H vibration mode, an intense band at 215 cm−1 which has been attributed to a magnetic excitation of Er3+ in view of its momentum transfer dependence.

Article information

Article type
Paper
Submitted
13 Dec 2010
Accepted
31 Jan 2011
First published
18 May 2011

Faraday Discuss., 2011,151, 307-314

YMn2Hx and RMn2−yFeyH6 (R = Y, Er) studied by Raman, infrared and inelastic neutron scattering spectroscopies

V. Paul-Boncour, S. F. Parker, H. Hagemann, S. M. Filipek, R. Wierzbicki and M. Latroche, Faraday Discuss., 2011, 151, 307 DOI: 10.1039/C0FD00019A

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