Title :
Influence of cation substitution on spin-state transitions in mixed RE cobaltites and chromites
Author :
Vasylechko, L. ; Bell, A.M.T.
Author_Institution :
Lviv Polytechnic National University, Ukraine
Abstract :
Phase and structural behaviour of new mixed cobaltites R1−xR′xCoO3 (R, RR′ = La, Pr, Nd, Sm, Eu, Gd) and cobaltites-chromites RCo0.5Cr0.5O3 (R = Pr, Sm, Eu, Gd) has been studied in the temperature range of 298–1173K. Strong anomalies in the lattice expansion reflecting the changes in spin state of Co3+ ions, are found. Correlations between the structural parameters, characteristic temperatures of thermal expansion coefficients and the temperatures of spin-state transitions in the mixed RE cobaltites has been established.
Keywords :
Ions; Lattices; Powders; Temperature distribution; Thermal expansion; X-ray diffraction; crystal structure; mixed rare-earth cobaltites and cobaltites-chromites; perovskites; spin-state transitions; thermal expansion;
Conference_Titel :
Oxide Materials for Electronic Engineering (OMEE), 2012 IEEE International Conference on
Conference_Location :
Lviv, Ukraine
Print_ISBN :
978-1-4673-4491-3
DOI :
10.1109/OMEE.2012.6464781
