Evidence for an Electrical Field Induced Order—Order Transition in Nd_0.7Sr_0.3MnO_z.

Abstract

7Sr0.3MnOz. -Evidence for an electrical field induced magnetic order-order transition in the title compound in regions close to highly insulating grain or phase boundaries is deduced from a temperature-current phase diagram collected from the appearance and/or shift of the characteristic transition temperatures at certain applied currents (or potentials). The electrical field which probably lowers the energy barrier of the boundary is supposed to drastically change the electronic states in the barrier region (Stark effect). -(YANG, C. P.; MORCHSHAKOV, V.; TROYANCHUK, I. O.; RAO, G. H.; BAERNER*, K.; J.