阳离子取代对稀土钴酸盐和铬铁矿混合中自旋态转变的影响

2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE) Pub Date : 2012-09-01 DOI:10.1109/OMEE.2012.6464781

L. Vasylechko, A. Bell

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引用次数: 5

摘要

在298 ~ 1173k温度范围内，研究了新型混合钴酸盐R1−xR’xcoo3 (R, RR’= La, Pr, Nd, Sm, Eu, Gd)和钴酸铬酸盐RCo0.5Cr0.5O3 (R = Pr, Sm, Eu, Gd)的物相和结构行为。在晶格扩展中发现了反映Co3+离子自旋态变化的强烈异常。建立了混合稀土钴酸盐的结构参数、热膨胀系数特征温度与自旋态转变温度之间的相关关系。

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Influence of cation substitution on spin-state transitions in mixed RE cobaltites and chromites

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.

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2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)

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