This article is aimed at studying the temperature dependence oxygen nonstoichiometry, magnetic moments, Fe3+ fraction, Néel temperature and conductivity of (La,Sr)FeO3-δ. It is found that the magnetic properties in La0.60 Sr0.40 Fe3-δ 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 (δ). when δ=0.2, the compound has maximum Fe3+, the saturation magnetic moments and Néel temperature are 3.8 µB and 410 °C, both at the highest level, whereas the total carrier concentration is at the minimum.
X. Zhou et al., "Coupled Electrical and Magnetic Properties in (La,Sr)FeO3-δ," Journal of Applied Physics, American Institute of Physics (AIP), Jan 2005.
The definitive version is available at http://dx.doi.org/10.1063/1.1860911
Materials Science and Engineering
United States. Department of Energy
Keywords and Phrases
Antiferromagnetic Materials; Electron Density; Hole Density; Lanthanum Compounds; Magnetic Moments; Neel Temperature; Seebeck Effect; Stoichiometry; Strontium Compounds; Superexchange Interactions
Article - Journal
© 2005 American Institute of Physics (AIP), All rights reserved.