High field magnetization of two types of shortly correlated systems : random anisotroy systems and nanoparticles

B. Barabara , J. Filippi , A. Marchand , P. Mollard , V. Amaral , X. Devaux , A. Rousset

The magnetization curves of two types of systems (random anisotropy amorphous alloys and ferromagnetic nanoparticles) having finite correlation lengths have been measured and analysed in a wide range of magnetic fields. The results show how these measurements allow us to determine i) the ferromagnetic (thermal) and the atomic (quenched) correlations in amorphous alloys and ii) the quenched distribution of nanoparticles and their mean magnetic moments (role of chemical disorder at the interface boundaries with the matrix). A general discussion involving both types of systems will conclude this paper.

Domaines: Articles anciens

B. Barabara, J. Filippi, A. Marchand, P. Mollard, V. Amaral, et al.. High field magnetization of two types of shortly correlated systems : random anisotroy systems and nanoparticles. Journal de Physique I, 1992, 2 (1), pp.101-109. ⟨10.1051/jp1:1992126⟩. ⟨jpa-00246455⟩