|NUKLEONIKA 2013, 58(3):387-390
EPR STUDY OF GUANIDINE ZINC SULPHATE CRYSTALS
Konrad Gruszka1, Ryszard Hrabański1, Julita Ozga1, Zbigniew Czapla2
1 Institute of Physics, Częstochowa University of Technology,
19 Armii Krajowej Ave., 42-200 Częstochowa, Poland
2 Institute of Experimental Physics, University of Wrocław,
8 M. Borna Sq., 50-204 Wrocław, Poland
X-band electron paramagnetic resonance (EPR) investigations of Mn2+-doped guanidine zinc sulphate [C(NH2)3]2Zn(SO4)2 – abbreviated as GZS – are presented. The EPR spectrum in the temperature range 273-393 K exhibits a group of five fine structure transitions each splits into six hyperfine components. The angular variation of EPR spectra reveals the presence of only one magnetic complex, which correspond to one distinct site of Mn2+ ions in the crystal lattice. From the observed EPR spectrum, the spin-Hamiltonian parameters have been evaluated. The variation of zero-field splitting (ZFS) parameter, intensity and line width with temperature are measured and discussed.