Abstract
The sensitivity of transport in colossal magnetoresistance (CMR) manganites to external electric and magnetic fields is examined using field effect configurations with (LCMO), , , and (0.5-doped LCMO) channels, and ferroelectric (PZT) or dielectric gates. A large electroresistance (ER) of at is found in LCMO with PZT-ferroelectric gate, but the magnitude of the effect is much smaller (a few percent) in the other three channels. The ER and CMR effects are remarkably complimentary. The size and systematics of the effect strongly favor a percolative phase separation picture.
- Received 5 January 2000
DOI:https://doi.org/10.1103/PhysRevLett.86.5998
©2001 American Physical Society