Paramagnetism of Cu3RE2W4O18 Semiconductors (RE = Gd, Dy-Er)
T. Grońa, E. Tomaszewiczb, H. Dudaa and S. Mazurc
aUniversity of Silesia, Institute of Physics, Uniwersytecka 4, 40-007 Katowice, Poland
bWest Pomeranian University of Technology, Department of Inorganic and Analytical Chemistry, al. Piastów 42, 71-065 Szczecin, Poland
cInternational Laboratory of High Magnetic Fields and Low Temperatures, Gajowicka 95, 53-529 Wrocław, Poland
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Cu3RE2W4O18 tungstates (RE = Gd, Dy-Er) are paramagnets in the temperature range 4.2-300 K visible also in the absence of the energy losses in the curve of the imaginary part of magnetic susceptibility, χ''. The negative values of the paramagnetic Curie-Weiss temperature, θ, may suggest the weak antiferromagnetic coupling below 4.2 K. The temperature independent component of magnetic susceptibility has a positive value indicating a domination of the Van Vleck contribution. Calculations of the effective number of the Bohr magnetons revealed that the orbital contribution to the magnetic moment comes mainly from the RE3+ ions.

DOI: 10.12693/APhysPolA.124.885
PACS numbers: 75.50.Pp, 75.20.-g, 75.30.Cr