Magnetic Properties of the MnSi3 Compound
J. Leciejewicz a, B. Penc b, A. Szytuła b, A. Jezierski c and A. Zygmunt d
a Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warszawa, Poland
b M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
c Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland
d W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław, Poland
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Received: 3 06 2007;
The magnetic and powder neutron diffraction data indicate a complex magnetic structure of Mn5Si3. This compound has the hexagonal D88 crystal structure at room temperature. The Mn atoms occupy two nonequivalent sublattices. Two phase transitions, at 60 and 106 K, are observed. The first one is between a non-collinear AF1 and a collinear AF2 magnetic structure, the second one is between the collinear AF2 structure and a paramagnetic state. At 106 K the crystal structure changes from the hexagonal to the orthorhombic one. The values of the Mn magnetic moment in both structures were calculated by different ab initio methods. The results of the calculations are compared with the values of the Mn magnetic moment determined experimentally in this work and presented in the previous ones.
DOI: 10.12693/APhysPolA.113.1193
PACS numbers: 71.20.Lp, 75.25.+z, 75.50.Ee