Crystal structures and magnetic properties of Pt-Mn-Sb alloys have been investigated by means of X-ray and magnetic analysis. It has been found that a new C1b type compound PtMnSb exists in the Pt-Mn-Sb system and forms solid solutions in the compositional range of Pt1.00Mn1.00Sb1.00∼Pt0.94Mn1.12Sb0.94. These alloys in solid solution have lattice parameters of about 6.196∼6.228 Å at room temperature, saturation magnetizations of 62.0∼64.0 e.m.u./g at absolute zero, effective Bohr magneton numbers of 3.73∼4.14 µB per Mn atom at absolute zero, and Curie temperatures of 522°∼595°K. The magnetic susceptibility of these alloys has been found to satisfy the Curie-Weiss law above the Curie temperature.
(Received April 16, 1970)
* This paper was presented at the Spring Meeting of the Japan Institute of Metals, April 1968, Tokyo, and the Autumn Meeting of the Japan Institute of Metals, September 1968, Sendai. Published originally in Japanese in Journal of the Japan Institute of Metals, 34 (1970), 638 : The 38th report of The Foundation : The Research Institute of Electric and Magnetic Alloys.
** The Foundation : The Research Institute of Electric and Magnetic Alloys, Sendai, Japan.
© 2002 The Japan Institute of Metals
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