Time and Field Dependence of the Magnetization in AuFe, AgMn and ThGd Spin Glasses.

S. OSEROFF; M. MESA; M. TOVAR; R.D. ARCE

JOURNAL OF APPLIED PHYSICS

AMER INST PHYSICS

Año: 1982 vol. 53 p. 2208 - 2210

0021-8979

We report time dependence measurements of the zero field cooled magnetization (MZFd and the thermoremanent magnetization (TRM) for AuFe (2 and 4 at.%), .A&Mn (1 and 4 at.%), and.Ih1_.Gdx (3 :s; x :s; 20 at. %) as a function of the magnetic field. The time effect behavior was similar in the three systems. The time dependence can be fitted with a log (t) law when the temperature T is not too close to the reversible temperature T R at which the magnetization becomes reversible. The rate of the TRM decay increased with H, presented a maximum with T, and extrapolated to zero when T-+TR´