Issues »  Volume 38, Issue 1

Neutron Diffraction Study of Fe$_{2}$MnGa Heusler Alloys

Yu. V. Kudryavtsev$^{1}$, A. E. Perekos$^{1}$, I. N. Glavatskyy$^{2}$, J. Dubowik$^{3}$, Yu. B. Skirta$^{4}$

$^{1}$G.V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03680 Kyiv-142, Ukraine
$^{2}$Helmholtz Centre Berlin for Materials and Energy, 1 Hahn Meitner Platz, 14109 Berlin, Germany
$^{3}$Institute of Molecular Physics PAN, ul. Mariana Smoluchowskiego 17, 60-179 Poznań, Poland
$^{4}$Institute of Magnetism under NAS and MES of Ukraine, 36b Academician Vernadsky Blvd., UA-03680 Kyiv-142, Ukraine

Received: 03.11.2015. Download: PDF

Effect of temperature and magnetic field on the structure and magnetic properties of Fe$_{50.1}$Mn$_{22.7}$Ga$_{27.2}$ і Fe$_{51.6}$Mn$_{17.8}$Ga$_{30.6}$ alloys is investigated in a temperature range 100 К < T < 580 К by using elastic neutron diffraction (ND) and magnetometry. The degree of atomic order as well as magnetic moments localized at the Mn and Fe sites in the investigated Fe$_{2}$MnGa alloys are experimentally evaluated using the ND data. Some disagreement between the experimental and calculated values of magnetic moments localized at the Mn and Fe sites can be explained by noticeable atomic disorder in the prepared Fe$_{2}$MnGa alloys. If antiferromagnetic order really exists in $L1_{2}$-phase containing Fe$_{50.1}$Mn$_{22.7}$Ga$_{27.2}$ alloy, this order has not a collinear character.

Key words: neutron diffraction, magnetic properties, atomic order, structural transformations.

URL: http://mfint.imp.kiev.ua/en/abstract/v38/i01/0053.html

DOI: https://doi.org/10.15407/mfint.38.01.0053

PACS: 61.05.cp, 61.05.fm, 72.15.Eb, 75.30.Cr, 75.30.Kz, 75.40.Cx, 75.50.Ee

Citation: Yu. V. Kudryavtsev, A. E. Perekos, I. N. Glavatskyy, J. Dubowik, and Yu. B. Skirta, Neutron Diffraction Study of Fe$_{2}$MnGa Heusler Alloys, Metallofiz. Noveishie Tekhnol., 38, No. 1: 53—66 (2016)

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