Electron spin resonance and optical measurements in YAG:V3+ crystals

摘要

Electron Spin Resonance and optical absorption spectra of trivalent vanadium in Y$-3$/Al$-5$/O$-12$/ crystals before and after $gamma@-irradiation and thermal annealing treatments are reported. The observed spectra are interpreted as arising from octahedrally coordinated V$+3$PLU$/(3d$+2$/) ions. We obtained Lande factor 2g$-x$/ $EQ 2.237, and hyperfine structure constant A$-$PLL$/ $EQ 330 $MUL 10$+$MIN@4$/ cm$+$MIN@1$/ for T $EQ 4 K. It is possible to obtain tetrahedrally coordinated V$+3$PLU$/ ions using annealing of YAG:V crystal in reducing atmosphere.