N. Kulagin et J. Dojcilovic, Strontium titanate: valency of Ti+n and dielectrical properties of doped single crystals, PHYSICA B, 269(1), 1999, pp. 49-59
This paper presents the results of a study of electronic structure, dielect
ric and spectral parameters of pure and doped strontium titanate single cry
stals under T = 10-300 K. The change of an electronic state of some part of
Ti+4 ions into Ti+3 ones, formation of the clusters with Ti+3 and Me+3 ion
s is the basis of anomaly of separate properties of SrTiO3, crystals. Charg
e transfer, tunnelling current, and transition into new electronic state of
the crystal may be causes of anomaly of the spectral properties, and tempe
rature dependence of epsilon(0), and tan delta which are discussed in this
paper. (C) 1999 Elsevier Science B.V. All rights reserved.