skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Inelastic neutron scattering studies of TbNiAlH1.4and UNiAlH2.0hydrides

Journal Article · · Journal of Physics. Condensed Matter

The optical vibrations of hydrogen in TbNiAlH{sub 1.4} and UNiAlH{sub 2.0} were investigated by means of inelastic neutron scattering. The experimental data were analysed, including multiphonon neutron scattering contributions, calculated in an isotropic harmonic approximation. At least two fundamental H optical peaks were observed in TbNiAlH{sub 1.4}, and were assigned to the vibrational modes of hydrogen atoms occupying different interstitial sites in the metal sublattice. The high-energy part of the UNiAlH{sub 2.0} spectra is characterized by strong anharmonicity, and a broad fundamental band. The latter can be accounted for by a large dispersion of phonon modes due to the strong H-H interactions, and/or different metal-hydrogen force constants, which may originate from different metal atoms surrounding the H atoms in the unit cell.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
W-31-109-ENG-38
OSTI ID:
15004071
Journal Information:
Journal of Physics. Condensed Matter, Vol. 15, Issue 17; ISSN 0953-8984
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English

References (21)

Magnetic structure study of ErCuAl and ErNiAl journal July 1996
Neutron diffraction study of magnetic structures in TbNiAl journal February 1997
Electronic properties of UNiAl in high magnetic fields journal April 1994
Hydrogen absorption–desorption, crystal structure and magnetism in RENiAl intermetallic compounds and their hydrides journal May 1997
H1NMR and magnetic susceptibility study ofThNiAlHxandUNiAlHx journal May 1984
Magnetic properties and crystal structure of HoNiAl and UNiAl hydrides journal May 2000
Structure and magnetic properties of TbNiAl-based deuterides journal January 2002
Hydride phases, structure, and magnetic properties of theUNiAlHysystem journal February 2001
Neutron scattering lengths and cross sections journal January 1992
Properties of UNiAlD2.1 and UNiAlH2.3 journal March 2000
Deuterium absorption properties and crystal structure of UNiAl journal May 1998
Structure and magnetic studies on UNiAlD2.2 journal June 2001
Deconvolution of data from the filter difference spectrometer: from hardware to maximum entropy
  • Sivia, D. S.; Vorderwisch, P.; Silver, R. N.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 290, Issue 2-3 https://doi.org/10.1016/0168-9002(90)90568-Q
journal May 1990
Hydrogen sorption properties of intermetallic TbNiAl and crystal structure of TbNiAlD1.1 journal October 1998
Crystal and magnetic structure of TbNiAl-based deuterides, TbNiAlD0.30 and TbNiAlD1.04, studied by neutron diffraction and synchrotron radiation journal December 1999
Hydrogen-induced changes in TbNiAl journal June 1998
Structure and lattice dynamics of titanium hydrides due to thermobaric treatment journal October 1995
A new type of three-phonon complexes (triphonons) journal December 1986
Strong anharmonicity effects for vibrations in crystals with impurities: local biphonons and triphonons journal January 1986
Dispersion of excited triphonons in crystals of various types journal May 1989
Strong anisotropy in the inelastic neutron scattering from PdH at high energy transfer journal August 1998