Thermal relaxation of magnetic clusters in amorphous Hf_{57}Fe_{43} alloy

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dc.creatorPajic, Damir
dc.creatorZadro, Kreso
dc.creatorRistic, Ramir
dc.creatorZivkovic, Ivica
dc.creatorSkoko, Zeljko
dc.creatorBabic, Emil
dc.date2006-08-14
dc.date2007-06-19
dc.date.accessioned2026-07-07T08:14:01Z
dc.date.available2026-07-07T08:14:01Z
dc.descriptionThe magnetization processes in binary magnetic/nonmagnetic amorphous alloy Hf_{57}Fe_{43} are investigated by the detailed measurements of magnetic hysteresis loops, temperature dependence of magnetization, relaxation of magnetization and magnetic ac susceptibility, including a nonlinear term. Blocking of magnetic moments at lower temperatures is accompanied with the slow relaxation of magnetization and magnetic hysteresis loops. All of the observed properties are explained with the superparamagnetic behaviour of the single domain magnetic clusters inside the nonmagnetic host, their blocking by the anisotropy barriers and thermal fluctuation over the barriers accompanied by relaxation of magnetization. From magnetic viscosity analysis based on thermal relaxation over the anisotropy barriers it is found out that magnetic clusters occupy the characteristic volume from 25 up to 200 nm3 . The validity of the superparamagnetic model of Hf_{57}Fe_{43} is based on the concentration of iron in the Hf_{100-x}Fe_{43} system that is just below the threshold for the long range magnetic ordering. This work throws more light on magnetic behaviour of other amorphous alloys, too.
dc.identifierhttps://arxiv.org/abs/cond-mat/0608307
dc.identifierhttp://arxiv.org/abs/cond-mat/0608307
dc.identifierJ. Phys.: Condens. Matter 19 (2007) 296207
dc.identifierdoi:10.1088/0953-8984/19/29/296207
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/132975
dc.subjectMaterials Science
dc.titleThermal relaxation of magnetic clusters in amorphous Hf_{57}Fe_{43} alloy
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