2004/11/08 by Hrvoje Meštrić, Hrvoje Mestric, Rüdiger-A. Eichel +6
Engineering · Materials Science · Physics and Astronomy · #Dielectric properties of ceramics #Ferroelectric and Piezoelectric Materials #Microwave Dielectric Ceramics Synthesis #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.1808477
published as J. Appl. Phys. 96, 12 (2004) pp. 7440-7444 · 6 pages, 3 figures, 1 table, to appear in J. App. Phys, 96 (2004)
arxiv created 2004/11/08 · openalex publication_date 2004/12/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The intrinsic iron(III) impurity center in polycrystalline lead titanate was investigated by means of high-frequency electron paramagnetic resonance spectroscopy in order to determine the local-environment sensitive fine-structure parameter D. At a spectrometer frequency of 190GHz, a spectral analysis of a powder sample was unambiguously possible. The observed mean value D=+35.28GHz can be rationalized if Fe3+ ions substitute for Ti4+ at the B site of the perovskite ABO3 lattice forming a directly coordinated FeTi′–VO∙∙ defect associate. A consistent fit of the multifrequency data necessitated the use of a distribution of the D values with a variance of about 1GHz. This statistical distribution of values is probably related to more distant defects and vacancies.