Dresden 2003 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
M: Metallphysik
M 41: Postersitzung
M 41.9: Poster
Donnerstag, 27. März 2003, 14:30–16:30, HSZ
Low-temperature nuclear spin relaxation in Lanthanum hydrides — •Andreas Tinner1, Stephan Leyer1, Gerda Fischer1, Elmar Dormann1, and Richard Barnes2 — 1Physikalisches Institut, Universität Karlsruhe (TH), D-76128 Karlsruhe — 2Department of Physics and Ames Laboratory, USDOE, Iowa State University, Ames, Iowa 50011, USA
For LaHx with hydrogen concentration x
close above
the metal-non-metal transition (i.e. 2.87 ≤ x ≤ 2.89) the
influence of Ce and Gd impurities on the low-temperature proton
spin-lattice relaxation [1] is analysed. The Ce concentration is also
studied by static magnetic susceptibility measurements. Thus the
influence
of the temperature dependent Ce electron spin dynamics on the
proton
spin-lattice relaxation can be compared quantitatively with the
predictions of earlier established models [2]. These results are
discussed
in relation to the density of states derived from 139La nuclear
magnetic resonance in LaHx (2 ≤ x ≤ 3).
[1] S. Leyer, J.
Weizenecker, E. Dormann, J. Phys.: Condens. Matter 12 (2000)
6927
[2]
R.G. Barnes, in Hydrogen in Metals III, edited by H. Wipf (Springer,
Berlin, Heidelberg, 1997) 93