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Negative differential resistance in Gd0.5Sr0.5MnO3: A consequence of Joule heating

Wagh, Aditya A and Kumar, Anil PS and Bhat, HL and Elizabeth, Suja (2010) Negative differential resistance in Gd0.5Sr0.5MnO3: A consequence of Joule heating. In: Journal of Applied Physics, 108 (6).

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Abstract

Negative differential resistance (NDR) in current-voltage (I-V) characteristics and apparent colossal electroresistance were observed in Gd0.5Sr0.5MnO3 single crystals at low temperatures. The continuous dc I-V measurements showed a marked thermal drift. In addition, temperature of the sample surface was found to be significantly higher than that of the base at high applied currents. Two different strategies namely estimation and diminution of the Joule heating (pulsed I-V measurements) were employed to investigate its role in the electric transport properties. Our experiments reveal that the NDR in Gd0.5Sr0.5MnO3 is a consequence of Joule heating rather than the melting of charge order. (C) 2010 American Institute of Physics. doi:10.1063/1.3486221]

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Institute of Physics.
Keywords: electrical resistivity; gadolinium compounds; strontium compounds
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 08 Nov 2010 08:50
Last Modified: 08 Nov 2010 08:50
URI: http://eprints.iisc.ernet.in/id/eprint/33554

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