In γ-Fe2MnGa Heusler alloy do Fe and Mn sublattices magnetically couple parallel or antiparallel at low temperatures?

E. C. Passamani, C. Larica, G. Viali, J. R. Andrez, A. Y. Takeuchi, V. P. Nascimento, V. A.P. Rodriguez, C. Rojas-Ayala, E. Baggio-Saitovitch

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

10 Citas (Scopus)

Resumen

Bulk and local magnetic properties of the polycrystalline γ-Fe2MnGa Heusler alloy have been studied using X-ray diffraction, magnetization measurements and zero-field and in-field Mössbauer spectroscopy. X-ray diffraction data indicate stabilization of a L12-type structure and no structural phase transformation in the temperature range 30-300 K. While Mn atomic magnetic moments order magnetically well above 300 K according to magnetization data, 57Fe Mössbauer spectroscopy suggests that the Fe-sublattice ordering temperature is ca. 220 K, when it couples antiparallel to the Mn-sublattice. Large vertical (magnetization-axis) and horizontal (field-axis) magnetization loop shifts are observed in field-cooling process (up to 70 kOe); these effects may be associated with magnetic frustrated state that occurs by interaction of the two sublattices.

Idioma originalInglés
Páginas (desde-hasta)164-169
Número de páginas6
PublicaciónJournal of Alloys and Compounds
Volumen628
DOI
EstadoPublicada - 15 abr 2015

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©2014 Elsevier B.V. All rights reserved.

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