Antiferromagnetism and Weak Ferromagnetism of Disordered bcc Cr–Mn Alloys

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  • Antiferromagnetism and Weak Ferromagnet

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Abstract

Magnetic and electrical properties of concentrated Cr1−xMnx alloy (0≤x≤0.6) with the bcc structure were investigated. The magnetic property shows a band antiferromagnetism (0<x≤0.10) and an additive localized paramagnetism (x>0.1). An analysis of the electrical resistivity gives a truncation factor of the Fermi surface as a function of x. By these results, the localized state of spins of Mn atoms and the concentration dependence of antiferromagnetic energy gap are elucidated. Weak ferromagnetism appears in the range of 0<x<0.17 with the Curie point of 45 K and the maximum moment of 0.0029 μB per atom, and occurrence conditions of the weak ferromagnetism are shown.

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