The Effect of Oxygen Vacancies in Ca1−xSrxHfO3

• Published in: Ferroelectrics Vol. 396; no. 1; pp. 37 - 48
• Main Authors: López-garcía, A., Alonso, R. E., Falabella, M., Echeverría, G.
• Format: Journal Article
• Language: English
• Published: Colchester Taylor & Francis Group 01-01-2010; Taylor & Francis
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Crystal structure; Discontinuity; Exact sciences and technology; Ferroelectric materials; Interaction parameters; Lattice vacancies; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Mössbauer effect; other γ-ray spectroscopy; Oxides; Oxygen Vacancies; Perovskites; Physics; Solid Solutions; TDPAC; Temperature dependence; Vacancies; Vacancies; Lattice distortion; Calcium Strontium Hafnates Mixed; Perovskites; XRD; High temperature; Lattice parameters; Electric field gradients; Perturbed angular correlation; Solid solutions; Oxygen Vacancies; Temperature effects; Solid state reaction; Chemical composition; Hyperfine interactions; TDPAC
• ISSN: 0015-0193; 1563-5112
• DOI: 10.1080/00150191003795130

Samples of Ca
1−x
Sr
x
HfO
3
with x = 0.25, 0.50 and 0.75 have been studied. These oxides were synthesized using the high temperature solid state reaction method that can produce oxygen vacancies. The lattice and the hyperfine interaction parameters were determined. From these data it is possible correlate the behaviour of the hyperfine parameters with composition and temperature. The effect of oxygen vacancies is analyzed. The temperature dependence of hyperfine parameters display discontinuities that are interpreted as signs of crystalline phase transitions at about 900, 850 and 700 K, for x = 0.25, 0.50 and 0.75, respectively.