Anomalous aging and strain induced time dependent phenomena in ultra-thin La0.65Ca0.35MnO3 films

Abstract

We have shown that ultra-thin La0.65Ca0.35MnO 3 films exhibit strong metastable behavior. The resistance can vary with time significantly, suggesting that a state of dynamic phase separation exists whereby one phase grows at the expense of another. Physical properties associated with the metastable behavior have been investigated on the films grown on different substrates. We have found that ultra-thin films age much faster than the thicker counterparts and more interestingly the metastability in the resistance of these films enhanced when aged. © 2011 Elsevier B.V. All rights reserved.