Studies of Mn valence conversion and oxygen vacancies in La₁₋ₓCaₓMnO₃₋[subscript y] using electron energy-loss spectroscopy

Show full item record

Please use this identifier to cite or link to this item: http://hdl.handle.net/1853/27242

Title: Studies of Mn valence conversion and oxygen vacancies in La₁₋ₓCaₓMnO₃₋[subscript y] using electron energy-loss spectroscopy
Author: Wang, Z. L. (Zhong Lin) ; Yin, Jinsong ; Jiang, Yongdong ; Zhang, Jiming
Abstract: Using the white line intensities, electron energy-loss spectroscopy in a transmission electron microscope has been employed to characterize the valence conversion and oxygen vacancies in La₁₋ₓCaₓMnO₃₋[subscript y]. For a nominal doping composition x = 0.33, the ratio of Mn³⁺ to Mn⁴ ⁺ is determined to be more than 0.25 but less than 0.5, and the content of oxygen vacancy y is no more than 0.065 (equivalent to 2.2 at. % of the oxygen content). At y[subscript max] = 0.065, 60% of the residual charge introduced by Ca doping is balanced by the conversion of Mn³⁺ to Mn⁴ ⁺and 40% by oxygen vacancy.
Description: ©1997 American Institute of Physics. The electronic version of this article is the complete one and can be found online at: http://link.aip.org/link/?APPLAB/70/3362/1 DOI:10.1063/1.119171
Type: Article
URI: http://hdl.handle.net/1853/27242
ISSN: 0003-6951
Citation: Applied Physics Letters, 70 (1997) 3362-3364
Date: 1997-06-23
Contributor: Georgia Institute of Technology. School of Materials Science and Engineering
Advanced Technology Materials
Publisher: Georgia Institute of Technology
American Institute of Physics
Subject: Lanthanum oxides
Calcium oxides
Manganese oxides
Vacancies
Magnetic materials
Perovskites
Thin films
Chemical vapor deposition
Lanthanum compounds
Mixed valence compounds
Vacancies (crystal)
Electron energy loss spectra
Giant magnetoresistance
Calcium compounds

All materials in SMARTech are protected under U.S. Copyright Law and all rights are reserved, unless otherwise specifically indicated on or in the materials.

Files in this item

Files Size Format View
1997_09_97_APL_1.pdf 269.2Kb PDF View/ Open

This item appears in the following Collection(s)

Show full item record