Abstract

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.

Department(s)

Materials Science and Engineering

Second Department

Physics

Third Department

Chemistry

Sponsor(s)

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

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2005 American Institute of Physics (AIP), All rights reserved.

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