Magnetism, Charge Order and Giant Magnetoresistance in SrFeO${}_{3-\hat{I}´}$ Single Crystals

Abstract

The electronic and magnetic properties of SrFeO${}_{3-\hat{I}´}$ single crystals with controlled oxygen content ($0\le \hat{I}´\le 0.19$) have been studied systematically by susceptibility, transport and spectroscopic techniques. An intimate correlation between the spin-charge ordering and the electronic transport behavior is found. Giant negative as well as positive magnetoresistance are observed.

published version