ACTA

Magnetic Anisotropy of UFe_10-xNi_xSi₂ Intermetallic Alloys

Z. Drzazga^a, W. Suski^b, K. Wochowski^b, J. Wójcik^a and A. Winiarska^a
^aInstitute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
^bW. Trzebiatowski Institute for Low Temperature and Structural Research Polish Academy of Sciences, 50-950 Wrocław, P.O. Box 937, Poland

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The magnetic anisotropy in UF_10-xNi_xSi₂ series has been studied by torsion magnetometry and initial ac magnetic susceptibility measurements in the temperature range of 77-293K. The effective anisotropy constant changes with Ni content showing some increase for intermediate concentration. An increase in magnetic anisotropy energy at low temperatures is due to the uranium sublattice ordering. Magnetic anisotropy behaviour in UFe₂Ni₈Si₂ is influenced by an additional enhancement of the 3d sublattice connected with the ordering Fe magnetic moments.

DOI: 10.12693/APhysPolA.98.555
PACS numbers: 75.30.Gw, 75.20.En, 61.10.Nz