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28 March 2024
 
  » arxiv » cond-mat/0001025

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Colossal electroresistance and electronic phase separation in mixed-valent manganites
T. Wu ; S. B. Ogale ; J. E. Garrison ; B. Nagaraj ; Z. Chen ; R. L. Greene ; R. Ramesh ; T. Venkatesan ; A. J. Millis ;
Date 3 Dec 1999
Subject Strongly Correlated Electrons | cond-mat.str-el
AbstractThe sensitivity of transport in CMR manganite to external fields is examined using a PZT-based field effect configuration with a La0.7Ca0.3MnO3 channel subjected to electric and magnetic fields, separately and in conjugation. We not only find a colossal electroresistance (CER) of ~76% at 4X10^5 V/cm, but also a remarkable complimentarity of this CER with the widely studied CMR. Specifically, the ERmax (MRmax) of the system is largely independent of the magnetic (electric) field biasing, and for equal conductivity values, the ER (MR) is lower (higher) for TTp. The size and systematics of the effect strongly favor a percolative phase separation picture.
Source arXiv, cond-mat/0001025
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