Neutron and EPR Study of Cu(tn)Cl2 - a Two-Dimensional Spatially Anisotropic Triangular-Lattice Antiferromagnet
R. Tarasenkoa, A. Orendáčováa, E. Čižmára, S. Maťašb, M. Orendáča, V. Zeleňákc, V. Pavlíkd, K. Siemensmeyerb, S. Zvyagine, J. Wosnitzae, A. Fehera
aInstitute of Physics, Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
bHelmholtz-Zentrum Berlin, Hahn-Meitner Platz 1, D-14109 Berlin, Germany
cInstitute of Chemistry, Faculty of Science, P.J. Šafárik University, Moyzesova 11, 041 54 Košice, Slovakia
dInstitute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia
eDresden High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf and TU Dresden, D-01314 Dresden, Germany
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We have studied the temperature dependence of the lattice parameters and the influence of spin anisotropy on the electron paramagnetic spectra of Cu(tn)Cl2, an S=1/2 quasi-two-dimensional spatially-anisotropic triangular-lattice Heisenberg antiferromagnet. The variation of the resonance fields with temperature reflects the presence of an easy-plane exchange anisotropy with Jz/Jx,y<1 and g-factor anisotropy, gz/gx,y>1.

DOI: 10.12693/APhysPolA.126.232
PACS numbers: 75.30.Gw, 75.50.Ee