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Infrared studies of a La_(0.67)Ca_(0.33)MnO_3 single crystal: Optical magnetoconductivity in a half-metallic ferromagnet

Boris, A. V. and Kovaleva, N. N. and Bazhenov, A. V. and van Bentum, P. J. M. and Rasing , Th. and Cheong, S-W. and Samoilov, A. V. and Yeh, N.-C. (1999) Infrared studies of a La_(0.67)Ca_(0.33)MnO_3 single crystal: Optical magnetoconductivity in a half-metallic ferromagnet. Physical Review B, 59 (2). R697-R700 . ISSN 0163-1829. http://resolver.caltech.edu/CaltechAUTHORS:20111213-141105315

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Abstract

The infrared reflectivity of a La_(0.67)Ca_(0.33)MnO_3 single crystal is studied over a broad range of temperatures (78–340 K), magnetic fields (0–16 T), and wave numbers (20–9000cm^(-1)). The optical conductivity gradually changes from a Drude-like behavior to a broad peak feature near 5000cm-1 in the ferromagnetic state below the Curie temperature T_C=307K. Various features of the optical conductivity bear striking resemblance to recent theoretical predictions based on the interplay between the double exchange interaction and the Jahn-Teller electron-phonon coupling. A large optical magnetoconductivity is observed near T_C.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevB.59.R697DOIUNSPECIFIED
http://link.aps.org/doi/10.1103/PhysRevB.59.R697PublisherUNSPECIFIED
http://arxiv.org/abs/cond-mat/9808049arXivUNSPECIFIED
Additional Information:© 1999 The American Physical Society. Received 30 September 1998. This research at the Institute of Solid State Physics is supported by Russian State Program under Grant No. 96031. Part of the work done at Caltech is supported by NASA/OSS and the Packard Foundation.
Funders:
Funding AgencyGrant Number
Russian State Program 96031
NASA/OSSUNSPECIFIED
Packard FoundationUNSPECIFIED
Classification Code:PACS: 75.30.-m, 71.38.+i, 72.80.Ga, 78.30.-j
Record Number:CaltechAUTHORS:20111213-141105315
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20111213-141105315
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:28454
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:14 Dec 2011 16:22
Last Modified:26 Dec 2012 14:36

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