DC- and pulse electroresistive effects in mixed manganites-a new view

Abstract

A new concept is introduced which can develop interface electroresistive (ER-) and pulse electro-resistive (EPIR-) effects far from phase transition temperatures and phase separation regions. It is based on strong self-trapping effects in mixed manganites, but this self-trapping is rather connected with larger defect trap states, not just with trapped electrons or holes. Due to a peculiar electrical field induced feedback, this self-trapping does not occur at random, but rather tends to build up space charge accumulation layers which are not at equilibrium with the matrix free carriers. (C) 2013 Elsevier B.V. All rights reserved.