Investigations of crystal and magnetic properties of the Mn5−xFexGe3 intermetallic compounds |
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Authors: | JJ Bara BV Gajič AT Pȩdziwiatr A Szytuła |
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Institution: | Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Cracow, Poland |
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Abstract: | The Mn5?xFexGe3 intermetallic compounds are investigated with X-ray, neutron diffraction, magnetometric and Mössbauer effect methods. It is found that crystal structure of x = 1 compound is of D88 type while the structure of x = 3, 4 and 5 compounds is of B82 type. All are ferromagnets with collinearly ordered atomic spins. The lattice constants are derived from X-ray diffraction patterns, while magnetometric measurements yield the Curie temperatures and Weiss constants as well as the values of magnetic moments per molecule in ferromagnetic and paramagnetics states. The distributions of Fe and Mn atoms among two non-equivalent crystal sites are determined with the neutron diffraction method and are confirmed by the Mössbauer effect measurements. The parameters of hyperfine interactions are derived from Mössbauer absorption spectra and are attributed to iron atoms in two non-equivalent crystal sites. |
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