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Constraints on the Possible Long-Range Orbital Ordering in LaCoO3

Published

Author(s)

Daniel P. Phelan, Peter M. Gehring

Abstract

A neutron powder diffraction measurement was performed to distinguish between the proposed monoclinic (I2/a) structure of LaCoO3, which is consistent with orbital ordering, and the rhombohedral (R3c) structure, which is inconsistent with orbital ordering. These two structures were differentiated through a measurement of a superlattice reflection with a d-spacing of approximately 4.43 A which is only generated by I2/a. This reflection was not observed, and instead a restrictive upper bound was placed on its structure factor. The data is inconsistent with the monoclinic structure and suggests that there may be no long-range Jahn-Teller distortion in LaCoO3.
Citation
Journal of Magnetism and Magnetic Materials
Volume
350

Citation

Phelan, D. and Gehring, P. (2014), Constraints on the Possible Long-Range Orbital Ordering in LaCoO<sub>3</sub>, Journal of Magnetism and Magnetic Materials, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=914667 (Accessed June 18, 2024)

Issues

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Created December 31, 2013, Updated October 12, 2021