Kohlraush thermal relaxation in a random magnet
Citation:J M D Coey, D H Ryan and R Buder 'Kohlraush thermal relaxation in a random magnet' in Physical Review Letters, 58, (4), 1987, pp 385 - 388
Kohlrausch.pdf (published (publisher copy) peer-reviewed) 559.2Kb
Specific-heat measurements on amorphous FexZr100-x (x=90 and 92) by a thermal relaxation method reveal a temperature decay of the form T(t)=T0+T exp[-(t/)] below 20 K, where the alloys are asperomagnetically ordered. 0.5 when T00. The stretched exponential is a manifestation of nonergodic behavior, because of the inability of the spin system to explore the available random magnetic configurations on the 100-ms times scale of the experiment.
Author: COEY, JOHN MICHAEL DAVID
Publisher:American Physical Society
Series/Report no:Physical Review Letters
Availability:Full text available