Title
In γ-Fe<inf>2</inf>MnGa Heusler alloy do Fe and Mn sublattices magnetically couple parallel or antiparallel at low temperatures?
Date Issued
15 April 2015
Access level
metadata only access
Resource Type
journal article
Author(s)
Passamani E.
Larica C.
Viali G.
Andrez J.
Takeuchi A.
Nascimento V.
Baggio-Saitovitch E.
Publisher(s)
Elsevier Ltd
Abstract
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.
Start page
164
End page
169
Volume
628
Language
English
OCDE Knowledge area
Ingeniería de materiales
Minería, Procesamiento de minerales
Subjects
Scopus EID
2-s2.0-84920749652
Source
Journal of Alloys and Compounds
ISSN of the container
09258388
Sponsor(s)
The authors thank FAPES , CNPq and UFES for the financial support.
Sources of information:
Directorio de Producción Científica
Scopus