Electron paramagnetic resonance of Ag2+dimers in Na2Zn(SO4)2sdot;4H2O single crystals

摘要

Electron paramagnetic resonance studies have been made on Ag2+ion in Na2Zn(SO4)2sdot;4H2O single crystals at 300 K. Ag2+is obtained by thexirradiation of Ag+doped samples at ambient temperature and is found to be stable over a period exceeding one year. The EPR spectra indicate the presence of dimeric divalent silver species with the hyperfine structure with two inequivalent silver nuclei. The Agndash;Ag has a singlet ground state concluded from the spectra vanishing around 100 K. The major contribution to the fine structure tensor is found to be from spinndash;orbit coupling.