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Charge - Ordered Manganeese Oxide Studied By Ω - Filter - Angular Resolved EELS
Published online by Cambridge University Press: 02 July 2020
Abstract
Despite of the intensive studies, Colossal Magnetoresistance (CMR) phenomena occurring in manganese oxides is still not fully understood. Theoretical studies based on an ordered crystal phase such as the charge-ordering (CO) phase have shown some successes in reproducing experimental evidences. Recently it was, however, shown that such a CO phase included giant clusters which were as large as 100 nm. This indicates the importance of the nanometer-scale information about the electronic structure to understand the CO. La0.5Sr1.5MnO4 is one of the oxides under intense investigations. in the CO phase, the eg valence electrons were found to be ordered at Mn sites. The optical responses of the CO clusters, however, has not been studied. in this study we have attempted to obtain such information from CO clusters in La0.5Sr1.5MnO4 by angular-resolved electron-energy-loss-spectroscopy (EELS) using an in-column type Ω-spectrometer.
- Type
- EELS Microanalysis at High Sensitivity: Advances in Spectrum Imaging, Energy Filtering and Detection (Organized by R. Leapman and J. Bruley)
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- Copyright © Microscopy Society of America 2001