Electronic structure and magnetic properties of Ni phases embedded in CeO2 thin films

Title
Electronic structure and magnetic properties of Ni phases embedded in CeO2 thin films
Authors
Mayora VarshneyAditya Sharma채근화S. GautamH. J. Shin
Keywords
Thin films; XAS; magnetism; XRD
Issue Date
2015-01
Publisher
Applied Science Letters
Citation
VOL 1, NO 1, 19-23
Abstract
We present a detailed study on the synthesization of Ni nanophases embedded in the CeO2 thin films by ion implantation and their characterization by element specific x-ray absorption spectroscopy technique. We implanted Ni in CeO2 thin films at different atomic percentage; 2%, 5% and 7%. XRD and Ni L3,2 – edge spectra confirmed the formation of, mixed, Ni metallic and oxide phases in the implanted CeO2 thin films. To analyze the effect of Ni implantation on the valence state of Ce ions, systematic, XANES spectra at Ce L – edge have been examined. We have not observed any significant changes in the Ce L – edge spectra with increasing the Ni concentrations, indicating that valance state of Ce is not affected by the Ni implantation. The room temperature hysteresis measurements demonstrate the competing nature of magnetic interactions between Ni metallic and Ni oxide nanophases.
URI
http://pubs.kist.re.kr/handle/201004/50470
ISSN
2394479X
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KIST Publication > Article
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