Phys. Rev. Lett. 102, 026401 (2009) [4 pages]

Local Structure of La_1-xSr_xCoO₃ Determined from EXAFS and Neutron Pair Distribution Function Studies

Abstract

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N. Sundaram¹, Y. Jiang¹, I. E. Anderson¹, D. P. Belanger¹, C. H. Booth², F. Bridges¹, J. F. Mitchell³, Th. Proffen⁴, and H. Zheng³
¹Department of Physics, University of California, Santa Cruz, California 95064, USA
²Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road Berkeley, California 94720, USA
³Materials Science Division, Argonne National Laboratory, 9700 Cass Avenue, Argonne, Illinois 60439, USA
⁴Lujan Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

Received 11 June 2008; published 13 January 2009

The combined local structure techniques, extended x-ray absorption fine structure 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 La_1-xSr_xCoO₃ for a significant fraction of Co sites (x≤0.35), indicating few, if any, JT-active, singly occupied e_g Co sites exist.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.102.026401

DOI:

10.1103/PhysRevLett.102.026401

PACS:

71.70.Ej, 61.05.cj

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Phys. Rev. Lett. 102, 026401 (2009) [4 pages]

Local Structure of La1-xSrxCoO3 Determined from EXAFS and Neutron Pair Distribution Function Studies

Local Structure of La_1-xSr_xCoO₃ Determined from EXAFS and Neutron Pair Distribution Function Studies