Coupled electrical and magnetic properties in (La,Sr)FeO3-δ -: art. no. 10C314

This article is aimed at studying the temperature dependence oxygen nonstoichiometry, magnetic moments, Fe 3, fraction, Neel temperature and conductivity of (La,Sr)FeO3-delta. It is found that the magnetic properties in La0.60Sr0.40FeO3-delta is determined by Fe3+ and its concentration, and the conductance is resulted from Fe4+ ions, which act as electron holes. Both of magnetic and electrical properties were directly governed by oxygen nonstoichiometry (delta). When delta=0.2, the compound has maximum Fe3+ the saturation magnetic moments and Neel temperature are 3.8 mu B and 410 degrees C, both at the highest level, whereas the total carrier concentration is at the minimum. (c) 2005 American Institute of Physics.