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Unusual Field Dependence of the Resistivity and Magnetoresistance in $Nd_{0.5}Ca{0.5}MnO_3$

Mahendiran, R and Mahesh, R and Gundakaram, R and Raychaudhuri, AK and Rao, CNR (1996) Unusual Field Dependence of the Resistivity and Magnetoresistance in $Nd_{0.5}Ca{0.5}MnO_3$. In: Journal of Physics: Condensed Matter, 8 (33). L455-L459.

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An unusually large positive magnetoresistance (MR) is found in the compound $Nd_{0.5}Ca_{0.5}MnO_3$ at low temperatures (T< 50K). The positive MR is seen when the magneticfield is first applied and it collapses at higher fields leading to a large negative MR as observed recently in other manganates showing charge-ordering transition. These magnetic field induced effects (negative MR) show large hysteresis even up to temperatures as high as 200 K. We explain the positive MR as originating from antiferromagnetic ordering in the presence of a ferromagnetic interaction.

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
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 19 Jan 2007
Last Modified: 19 Sep 2010 04:31
URI: http://eprints.iisc.ac.in/id/eprint/8398

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