Magnetic Structure and Phase Transformations in Mn5Si3

Abstract
A symmetry analysis of possible magnetic structures in crystals with the space group D is made for the wave vector of star {k12}. This analysis allows deciphering the neutron diffraction data on the character of antiferromagnetic ordering in the AF1 (below T1 = 66 K) and AF2 (below T2 = 99 K) phases. It is shown that the magnetic phase transitions arise mainly from the structural transformations that occur at T1 and T2.

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