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Piezoresistivity (with uniaxial strain) in nanocrystalline films of rare-earth manganites

Sarkar, Jayanta and Raychaudhuri, AK (2006) Piezoresistivity (with uniaxial strain) in nanocrystalline films of rare-earth manganites. In: IEEE Conference on Emerging Technologies - Nanoelectronics,, Jan 10-13, 2006, Singapore, Singapore, pp. 372-375.

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Abstract

We present a study of the piezoresistivity in nanostructured. polycrystalline films of La0.67Ca0.33MnO3 and La0.67Sr0.33MnO3 grown on oxidized Si (100) substrates. We have observed that the hole doped rare-earth manganites, which are well known for being colossal magnetoresistive (CMR) show change in its resistance under uniaxial strain even at room temperature. The piezoresistance was measured at room temperature by bending the Si cantilevers (on which the film is grown) in flexural mode both with compressive and tensile strain. The resistance of the film increases with tensile strain and decreases with compressive strain. A large gauge factor of 15-20 is seen in these films at room temperature.

Item Type: Conference Paper
Additional Information: Copyright 2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 27 Aug 2010 04:47
Last Modified: 19 Sep 2010 06:12
URI: http://eprints.iisc.ernet.in/id/eprint/30476

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