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Nonlinear conduction in charge-ordered $Pr_{0.63} Ca_{0.37}MnO_3$: Effect of magnetic fields

Guha, Ayan and Raychaudhuri, AK and Raju, AR and Rao, CNR (2000) Nonlinear conduction in charge-ordered $Pr_{0.63} Ca_{0.37}MnO_3$: Effect of magnetic fields. In: Physical Review B, 62 (9). pp. 5320-5323.

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Nonlinear conduction in a single crystal of charge-ordered $Pr_{0.63}Ca_{0.37}MnO_3$ has been investigated in an applied magnetic field. In zero field, the nonlinear conduction, which starts at $T<T_{CO}$, can give rise to a region of negative differential resistance (NDR) which shows up below the Neel temperature. Application of a magnetic field inhibits the appearance of NDR and makes the nonlinear conduction strongly hysteritic on cycling of the bias current. This is most severe in the temperature range where the charge-ordered state melts in an applied magnetic field. Our experiment strongly suggests that application of a magnetic field in the charge-ordering regime causes a coexistence of two phases.

Item Type: Journal Article
Publication: Physical Review B
Publisher: American Institute of Physics
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 24 Aug 2006
Last Modified: 19 Sep 2010 04:30
URI: http://eprints.iisc.ac.in/id/eprint/8079

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