Electron paramagnetic resonance of the Eu2+ ion in SrCl2 at high pressure

This paper reports an EPR study of the effect of hydrostatic pressure (up t o 10 kbar) and temperature (300, 77, and 4.2 K) on the spin Hamiltonian par ameters of the Eu2+ ion in a SrCl2 cubic crystal. It is found that the b(4) parameter is related by a power law to the distance from the Cl-1 ligand ( b(4) similar to R-13.5). The pressure and temperature are shown not to be e quivalent thermodynamic parameters. Lattice vibrations contribute noticeabl y to the initial S-ion splitting. (C) 2001 MAIK "Nauka/Interperiodica".