Abstract
57Fe Mossbauer effect studies were carried out on the quasibinary Ni3Fe1-xSix alloy system for x = 0, 0.1, 0.25, 0.5, 0.75 and 0.9 compositions. Single phase alloys are formed upto x = 0.5 whereas a two phase alloy is observed for x = 0.75 composition. The x = 0.9 composition also shows single phase formation with lattice parameters close to Ni3Si. Substitution of Si primarily takes place at the Fe sites and the x = 0.25 composition shows a high degree of L12 order. The magnetic hyperfine field systematics are discussed in terms of first and second neighbour configurations.
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