On the NMR Satellites in the X_2(Y_<1-v>η_v)Z Type Heusler Alloys
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In the development of Niculescu et al.'s idea, the general expression of the hyperfine field of the nucleus in the Heusler alloy, X_2(Y_<1-v>η_v)Z containing the impurity η is derived on the basis of the phenomenological relation between the moment and the local environment variable indicating the impurity arrangement around the nucleus. The expression is applied to several NMR experimental results and gives a satisfactory interpretation of the NMR satellites as well as the phenomenological coefficients in Fe_<3-x>V_xSi and Fe_<3-x>Mn_xSi alloy systems. The coefficients are in good agreement with those obtained independently in Fe_3Z and CO_2MnZ alloy systems. The analysis of the NMR spectrum of Mn_2V_<1-y>Al_<1+y> alloy suggests that V atom should have the magnetic moment in addition to Mn in this alloy.
- 東北大学の論文
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