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Proceedings Paper

Lattice effects on magnetic and transport properties in La0.67-xGdxSr0.33CoO3
Author(s): C. J. Zhang; B. H. Kim; J. S. Kim; Y. W. Park
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Paper Abstract

The lattice effects on the magnetic and transport properties in La0.67-xGdxSr0.33CoO3 series are studied. The introduction of smaller Gd3+ ions leads to an enhanced mismatch between the La-O layer and the CoO2 layer and a decrease of the tolerance factor t. The spin-state of trivalent Co ion transits to low-spin state with the decrease of Co-O bond length. The doping of Gd3+ drives the system from the cluster-glass state to the spin-glass state and progressively decreases the Curie temperature. At high Gd3+ doping content, an interesting negative magnetoresistance occurs at low temperature.

Paper Details

Date Published: 30 August 2005
PDF: 9 pages
Proc. SPIE 5932, Strongly Correlated Electron Materials: Physics and Nanoengineering, 593229 (30 August 2005); doi: 10.1117/12.623732
Show Author Affiliations
C. J. Zhang, Seoul National Univ. (South Korea)
B. H. Kim, Seoul National Univ. (South Korea)
J. S. Kim, Seoul National Univ. (South Korea)
Y. W. Park, Seoul National Univ. (South Korea)


Published in SPIE Proceedings Vol. 5932:
Strongly Correlated Electron Materials: Physics and Nanoengineering
Ivan Bozovic; Davor Pavuna, Editor(s)

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