EPR and ENDOR studies show that chromium is incorporated in mono crystalline regions of the grains in PbTiO3ceramics as Cr5+ions at Ti4+sites. The local symmetry of the Cr5+impurity is lower than of the host Ti4+site in the crystallite. ESE measurements of the spin-lattice relaxation of the Cr5+centre point to a structural transition at 10 K. © 1986.
Böttcher, R., Brunner, W., Milsch, B., Völkel, G., Windsch, W., & Kirillov, S. T. (1986). EPR, ENDOR and ESE investigations on chromium modified PbTiO3ceramics. Chemical Physics Letters, 129(6), 546–549. https://doi.org/10.1016/0009-2614(86)80398-0