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Effect of particle size on the giant magnetoresistance of La0.7Ca0.3MnO3

Mahesh, R and Mahendiran, R and Raychaudhuri, AK and Rao, CNR (1996) Effect of particle size on the giant magnetoresistance of La0.7Ca0.3MnO3. In: Applied Physics Letters, 68 (16). pp. 2291-2293.

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Abstract

Effect of particle size on the electron transport and magnetic properties of La0.7Ca0.3MnO3 has been investigated. While the ferromagnetic Tc, low field magnetic susceptibility, and insulator‐metal transition are markedly affected by the particle size, the maximum magnetoresistance exhibited by the samples near Tc is not sensitive to the particle size. However, the magnetoresistance at 4.2 K increases with decrease in particle size, suggesting a substantial contribution by the grain boundaries. Preliminary measurements on La0.7Sr0.3MnO3 samples of different particle sizes also corroborate the above conclusions.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 26 Dec 2011 06:39
Last Modified: 26 Dec 2011 06:39
URI: http://eprints.iisc.ernet.in/id/eprint/42889

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