NMR Study of Antiferromagnetic γ Mn Alloys

概要

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NMR signals of Mn^<55> in antiferromagnetic γ Mn alloys have been observed in liquid helium temperature range. The internal field in pure γ Mn metal is estimated to be 65.2 kOe. This is small from the consideration of the magnetic moment of 2.4μ_B. A satellite signal appears at the field of about 95 kOe which is independent of the species of the impurity atom in the dilute alloys. The small internal field suggests that a large positive contribution is needed to compensate a large negative core polarization term. The appearance of one satellite at a higher frequency than the main line indicates that the compensation is the property of the Mn atom itself and the effect of the impurity atom is well limited to its nearest neighbors. This concept is useful also to explain the internal fields in the γ Mn alloys of high concentration range.
社団法人日本物理学会の論文
1973-09-05