Abstract
Tetragonal Cr5+ impurity centre in single crystals
of the perovskite SrTiO3. After careful analyses we came to the
conclusion that this centre is an off-centre system and no Jahn-Teller
impurity. From the previous stress experiments in EPR we calculated the linear
stress coupling tensor as β = 3.56×10-30 m3, which is in
agreement with other stress coupling tensors of off-centre systems in SrTiO3
as well as BaTiO3.