Magnetic relaxation in Ga0.6Mo2S4 spinel

Magnetization measurements on Ga0.6Mo2S4 cluster compound of modified spine l were performed at temperatures from 2 to 30 K. Temperature irreversibilit y of the magnetization develops just below the ferromagnetic transition tem perature. Relaxation isotherms of the thermoremanent magnetizations can be described by a superposition of a stretched exponential and a constant term , and shows distinctive aging effects. This implies the presence of the ori entational spin freezing in the ferromagnetic regime of the Ga0.6Mo2S4. (C) 1998 American Institute of Physics. [S0021-8979(98)50611-1].