Magnetic Behaviour of the Ce-Co-Mn Intermetallics of MgCu2 Structure Type
R. Dudric a, A. Popescu a, O. Isnard b, V. Pop a and M. Coldeaa
aBabes-Bolyai University, Faculty of Physics, Kogalniceanu Str. 1, 400084, Cluj-Napoca, Romania
bInstitut Néel du CNRS, Université Joseph Fourier, 38042 Grenoble, Cedex 9, France
Received: November 6, 2014; In final form: March 25, 2015
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The magnetic properties of CeCoMn, Ce3Co3Mn4 and Ce3Co6Mn alloys have been investigated by magnetization and susceptibility measurements in the temperature range (5-300) K and magnetic field up to 12 T. X-ray powder diffraction measurements showed that all three alloys are isostructural and crystallize in the cubic MgCu2 structure type. Both Ce and Co atoms are non-magnetic in all alloys like in the isostructural compound CeCo2. Magnetic behavior of the investigated alloys is mostly due to the Mn moments and depends essentially on the Mn-Mn distances. The interaction between the Mn moments is antiferromagnetic in CeCoMn and Ce3Co3Mn4 but a paramagnetic behavior for Ce3Co6Mn was evidenced in the studied temperature range.

DOI: 10.12693/APhysPolA.128.67
PACS numbers: 71.20.Eh, 75.20.En, 75.20.Hr, 75.30.Cr