Numéro
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
Page(s) C8-1035 - C8-1036
DOI https://doi.org/10.1051/jphyscol:19888472
Proceedings of the International Conference on Magnetism

J. Phys. Colloques 49 (1988) C8-1035-C8-1036

DOI: 10.1051/jphyscol:19888472

LONGITUDINAL FIELD µSR IN CuMn SPIN GLASSES BELOW Tf

H. Pinkvos1, F. N. Gygax2, E. Lippelt3 et Ch. Schwink4

1  Institut für Metallphysik und Nukleare Festhörperphysik, TU Braunschweig, Mendelssohnstr. 3, D-3300 Braunschweig, F.R.G.
2  Institut für Mittelenergiephysik der ETH Zürich, c/o Paul Scherrer Institut, CH-5234 Villigen, Switzerland
3  Institut für Mittelenergiephysik der ETH Zürich, c/o Paul Scherrer Institut, CH-5234 Villigen, Switzeriand
4  Institut für Metallphysik und Nukleare Festhörperphysik, TU Braunschweig, Mendelssohnstr. 3, D-3300 Braunschweig, F.R. G.


Abstract
We report on longitudinal field muon spin relaxation measurements in CuMn spin glasses below the freezing temperature Tf. The dynamic relaxation rate λd varies with field as λd ~ Bwith a temperature dependent exponent α. This confirms a power law decay for the local field autocorrelation function Sd (t) ~ t, but the temperature dependence of the exponent γ is not in agreement with theoretical mean field calculations.