Relaxation and temperature cycles of thermoremanent magnetization, M TRM , in the superspin-glass phase of [Co 80 Fe 20 (0.9 nm)/Al 2 O 3 (3 nm)] 10 have been investigated. The relaxation of M TRM exhibits ageing phenomena. In negative temperature cycles for temperature steps larger than 1 K the magnetic state is retrieved (memory effect) on returning to the measurement temperature. This property is independent of the application of a field step during intermediate cooling. In positive temperature cycles the relaxation is suppressed after temporary heating. The observations are discussed in the light of both the droplet and the hierarchical picture.
No takes yet. Share an insight, caveat, or question.
Sahoo et al. (2002) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: