Mössbauer and magnetic investigation of the system Mn5−xFexGe3 (x = 0.5, 1.0 and 1.5) |
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| Authors: | W.M. Reiff |
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| Affiliation: | Department of Chemistry, Northeastern University, Boston, Massachusetts 02115 USA; Materials Science Laboratories, Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712 USA |
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| Abstract: | Mössbauer and magnetic measurements were carried out on the compositions Mn4.5Fe0.5Ge3, Mn4FeGe3, and Mn3.5Fe1.5Ge3. Data were obtained from liquid N2 to about 600°K. The iron substitution takes place initially in the 4(d) sites of the D88 structure of Mn5Ge3 until one half of manganese is replaced; additional iron, then, may substitute in 6(g) sites. The postulated magnetic structure for Mn5Ge3 consists of ferromagnetic alignment of spins within the two sublattices and parallel alignment between them. When the Fe concentration exceeds 0.5, canting of spins occurs either between, or within, the sublattices. The limit of solubility of Fe in the structure appears to occur at, or slightly beyond, the Mn4FeGe3 composition. |
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