New mixed perovskite RCo0.5Cr0.5O3 (R = Dy, Ho, Er) as a potential thermoelectric and sensory material
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Date
2016
Journal Title
Journal ISSN
Volume Title
Publisher
Lviv Polytechnic Publishing House
Abstract
The mixed earth rare cobaltites and chromites with general formula RCo0.5Cr0.5O3 (R = Dy, Ho, Er) were obtained by solid state reaction in air at 1373 K. Based on high temperature X-ray synchrotron powder diffraction data in range temperature 298 –1273 K abnormal thermal expansion of lattice dimensions was observed. Thermal expansion coefficient showed maxima, which point on insulator-metal transition. Abnormal behavior is associated with changes of spin state of Co3+ ions.
Description
Keywords
perovskite, thermal expansion, lattice parameters, insulator-metal transition, spin state, mixed cobaltites and chromites, spin transition
Citation
New mixed perovskite RCo0.5Cr0.5O3 (R = Dy, Ho, Er) as a potential thermoelectric and sensory material / Vasyl Hreb, Leonid Vasylechko, Yurii Prots, Andrew Fitch // Litteris et Artibus : proceedings of the 6th International youth science forum, November 24–26, 2016, Lviv, Ukraine / Lviv Polytechnic National University. – Lviv : Lviv Polytechnic Publishing House, 2016. – P. 47–48. – Bibliography: 5 titles.