Local Structure of La1-xSrxCoO3 determined from EXAFS and neutron PDF studies
N. Sundaram, Y. Jiang, I.E. Anderson, D.P. Belanger, C.H. Booth, F., Bridges, J.F. Mitchell, Th. Proffen, H. Zheng
TL;DR
This study uses EXAFS and neutron PDF techniques to investigate the local structure of La1-xSrxCoO3, revealing minimal Jahn-Teller distortion and suggesting the absence of significant JT-active Co sites across a range of temperatures.
Contribution
It demonstrates that La1-xSrxCoO3 exhibits negligible Jahn-Teller distortion, challenging previous assumptions about its local structural behavior.
Findings
Minimal Jahn-Teller distortion observed
Few JT-active Co sites present
Temperature range 4-330 K analyzed
Abstract
The combined local structure techniques, extended x-ray absorption fine structure (EXAFS) and neutron pair distribution function analysis, have been used for temperatures 4 <= T <= 330 K to rule out a large Jahn-Teller (JT) distortion of the Co-O bond in La1-xSrxCoO3 for a significant fraction of Co sites (x <= 0.35), indicating few, if any, JT-active, singly occupied e_g Co sites exist.
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Taxonomy
TopicsX-ray Diffraction in Crystallography · Rare-earth and actinide compounds · X-ray Spectroscopy and Fluorescence Analysis