Lattice effects on magnetic and transport properties in La0.67-xGdxSr0.33CoO3

C. J. Zhang; B. H. Kim; J. S. Kim; Y. W. Park

doi:10.1117/12.623732

30 August 2005 Lattice effects on magnetic and transport properties in La_0.67-xGd_xSr_0.33CoO₃

C. J. Zhang, B. H. Kim, J. S. Kim, Y. W. Park

Proceedings Volume 5932, Strongly Correlated Electron Materials: Physics and Nanoengineering; 593229 (2005) https://doi.org/10.1117/12.623732
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

The lattice effects on the magnetic and transport properties in La_0.67-xGd_xSr_0.33CoO₃ 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.

Citation Download Citation

C. J. Zhang, B. H. Kim, J. S. Kim, and Y. W. Park "Lattice effects on magnetic and transport properties in La_0.67-xGd_xSr_0.33CoO₃", Proc. SPIE 5932, Strongly Correlated Electron Materials: Physics and Nanoengineering, 593229 (30 August 2005); https://doi.org/10.1117/12.623732

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