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Abstract
119Sn Mössbauer effect and bulk magnetization measurements were performed on the series of Heusler alloys (Ni1−xPdx)2MnSn (x=0.0, 0.15, 0.30, 0.40, 0.60, 0.70, 0.85, and 1.0) at 4.2 K. The Sn hyperfine field showed a linear decrease from +94 kOe in Ni2MnSn to −39 kOe in Pd2MnSn. The magnetization measurements gave values of 81 emu/gm in Ni2MnSn and 51 emu/gm in Pd2MnSn and yielded moments of approximately 4 μB per Mn atom in all the alloys in the series. The change in Sn hyperfine field may be explained most simply in terms of a changing conduction electron density which results from changes in the lattice parameter. Theoretical predictions of Jena and Geldart, as well as Blandin and Campbell, are discussed.
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