A Localized-Electron to Collective-Electron Transition in the System (La, Sr)CoO3
- 1 February 1968
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 39 (2), 1209-1210
- https://doi.org/10.1063/1.1656227
Abstract
Crystallographic, magnetic, and electrical studies of the system La1−xSrxCoO3.00±0.01 for 0≤x≤0.5 give indirect evidence for the presence of chemical inhomogeneities separating strontium‐free regions, where localized ``3d'' electrons occur at thermally excited high‐spin Co3+ ions, from strontium‐rich regions, where the ``3d'' electrons are collective and give ferromagnetism at low temperatures. These different regions occur within the same rhombohedral perovskite crystal and appear to represent two different electronic phases within the same crystallographic phase. A schematic band model for the ferromagnetic phase is presented.Keywords
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