De Toro, J A , de la Torre, M A L , Riveiro, J M , Beesley, A , Goff, J P and Thomas, M F (2004) Critical spin-glass dynamics in a heterogeneous nanogranular system. Physical Review B, 69 (22).
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The analysis of ac magnetic susceptibility data has shown that mechanically alloyed Fe30Ag40W30, a highly heterogeneous nanogranular system, exhibits critical dynamics in its transition to a low-temperature spin-glass-like phase, as proved by the power-law divergence of the relaxation time at T-g=19.7 K, and by the dynamic scaling behavior of the out-of-phase component of the susceptibility. Both analyses yielded a dynamic critical exponent znu=10.2+/-0.9, confirming the existence of a spin-glass-like phase transition at T-g, which, however, is not accompanied by the usual Mossbauer signature.
This is a Submitted version This version's date is: 6/2004 This item is not peer reviewed
https://repository.royalholloway.ac.uk/items/40a777a7-1782-989c-51e0-2bf27e29617e/1/
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