Magnetic properties of the FexMn0.600-xAl0.400, 0.200 ≤ x ≤ 0.600, disordered alloy series

Claudia González, German A. Pérez Alcázar, Ligia E. Zamora, Jesus A. Tabares, Jean Marc Greneche

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19 Citas (Scopus)


The magnetic properties of the FexMn0.600-xAl0.400 (0.200 ≤ x ≤ 0.600) disordered alloys were investigated by means of Mössbauer spectrometry, ac magnetic susceptibility, and ac calorimetry measurements. Our results are summarized in a magnetic phase diagram, which includes an antiferromagnetic phase for x ≤ 0.300 at T ≤ 225 K, a ferromagnetic one for x ≥ 0.425 at T ≤ 340 K, and a paramagnetic phase for high temperatures and all the compositions. This phase diagram also shows for the first time both a re-entrant spin-glass-ferromagnetic transition line for x ≥ 0.425 and T ≤ 60 K and a re-entrant spin-glass-antiferromagnetic one for x ≤ 0.300 and T ≤ 40 K. The occurrence of superparamagnetic-like blocked events (for 0.300 ≤ x ≤ 0.600 and at T ≈ 200 K) is associated with the presence of Fe-rich magnetic clusters which can originate from the disordered atomic character of the alloys.

Idioma originalInglés
Número de artículo320
Páginas (desde-hasta)6531-6542
Número de páginas12
PublicaciónJournal of Physics Condensed Matter
EstadoPublicada - 1 jul. 2002
Publicado de forma externa


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