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Title: Current-induced phase control in charged-ordered Nd0.5Ca0.5MnO3 and Pr0.6Ca0.4MnO3 crystals
Authors: Parashar, Sachin
Sudheendra, L
Raju, A R
Rao, C N R
Keywords: Rare-Earth Manganates
Insulator-Metal Transition
Experimental Situation
Resistive States
Issue Date: 15-Feb-2004
Publisher: American Institute of Physics
Citation: Journal of Applied Physics 95(4), 2181-2183 (2004)
Abstract: Single crystals of Nd0.5Ca0.5MnO3 and Pr0.6Ca0.4MnO3 show current-induced insulator-metal (IM) transitions at low temperatures. In addition, the charge-ordering transition temperature, T-co, decreases with increasing current. The electroresistive ratio, defined as rho(0.5)/rho(I) where rho(0.5) is the resistivity at a current of 0.5 mA and rho(I) the resistivity at a given applied current, I, varies markedly with temperature and the value of I. Thermal hysteresis observed in Nd0.5Ca0.5MnO3 and Pr0.6Ca0.4MnO3 at the IM transition indicates that the transition is first order. The current-induced changes are comparable to those induced by magnetic fields, and accordingly the IM transition in Pr0.6Ca0.4MnO3 is associated with a larger drop in resistivity. (C) 2004 American Institute of Physics.
Other Identifiers: 0021-8979
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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