Abstract
Abstract The order–disorder(O–D) transformation in the binary MPt 3 and the ternary CuMPt 6 (M=3d transition metals) alloys were studied. The O–D transformation temperatures ( T c ) were calculated by combining the method of pseudopotentials with the static concentration waves. The method originally proposed by Khachaturyan [Progress in Materials Science, vol. 22, Pergamon Press Ltd., Oxford, 1978, pp. 47–49; Phys. Met. Metallography 13 (1962) 493; Sov. Phys. Solid State 5 (1963) 16; Sov. Phys. Solid State 5 (1963) 548] was applied to the case of ternary CuMPt 6 alloys by using the concept of a pseudoatom. It is found that this model predicts results that are consistent with the experimental data.
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