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Doping dependence of transport and magnetic properties in $La_{1−x}Ca_xVO_3$

Maiti, K and Vasanthacharya, NY and Sarma, DD (1997) Doping dependence of transport and magnetic properties in $La_{1−x}Ca_xVO_3$. In: Journal of Physics: Condensed Matter, 9 (35). pp. 7507-7514.

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We report temperature dependences of transport and magnetic properties of $La_{1−x}Ca_xVO_3$ controlled by charge carrier doping (x = 0.0–0.5). The system exhibits an insulator-to-metal transition concomitant with an antiferromagnetic-to-paramagnetic transition near x = 0.2 with increasing substitution. Disorder effects are found to influence the low-temperature transport properties of both insulating and metallic compositions near the critical concentration. At higher temperature resistivity of the metallic compositions has a $T^2$ dependence close to the critical concentration (x = 0.2 and 0.3) and thus provides an example of disordered Fermi liquid behaviour near the Mott transition. In contrast, at larger doping (x = 0.4 and 0.5) the resistivity exhibits a $T^{1.5}$ dependence. The molar susceptibility for the metallic samples indicates substantial enhancements due to electron correlation.

Item Type: Journal Article
Publication: Journal of Physics: Condensed Matter
Publisher: Institute of Physics
Additional Information: Copyright of this article belongs to Institute of Physics.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 21 Mar 2007
Last Modified: 19 Sep 2010 04:35
URI: http://eprints.iisc.ac.in/id/eprint/9808

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