Abstract

An enriched 195Pt system was investigated by susceptibility measurements. Among isotopes of Pt, only 195Pt has the nuclear spin I = 1/2 with the nuclear magnetic moment 0.597μN and its natural abundance of 195Pt is 33.8%. Large magnetic moments are distinctly observed in enriched 195Pt wire samples which are isotopically 97.3, 80.0 and 33.8%-enriched 195Pt and in 97.3%-enriched thin film samples. These large magnetic moments were proportional to the 195Pt concentration. Observed magnetic moments for the powder samples with 97.3, 86.6% and natural abundance of 195Pt, and for the wire sample with the natural abundance was smaller than that for enriched wire samples. These behaviors can be described in part by Fe impurities, but moments were still larger than the pure magnetic moment of Fe for wire samples.

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