PERSISTENT SPECTRAL HOLE-BURNING OF EU3-XYXO3 CRYSTALS( AND PR3+ IN SRZR1)

Spectral hole-burning spectroscopy has been applied to proton conducti ng SrZrO3:Y3+ Single crystals. Transient and persistent hole-burning w ere observed in EU(3+) and Pr3+ doped SrZrO3:Y3+ crystals, respectivel y. It is shown that holes can be burned by the optical pumping of the nuclear quadrupole levels of EU(3+). Since the spectral hole in Pr3+ d oped crystals is observed only in H2O- or D2O-annealed samples, the ho le-burning is caused by light-induced H+ or D+ motion which leads to p ersistent changes in the local crystal fields around the Pr3+ ions. Th e barrier height of proton (deuteron) tunneling transport is estimated in the Pr3+ doped system. The relationship between the long range pro ton conduction at high temperature and the local proton dynamics at lo w temperature is discussed.