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Realization of enhanced room temperature ferromagnetism in pure and V-doped ZnO films on TOP functionalization

Published online by Cambridge University Press:  15 January 2014

G. Jayalakshmi  and
T. Balasubramanian
G. Jayalakshmi
Affiliation:
Department of Physics, Thin film Laboratory, National Institute of Technology, Tiruchirappalli 620015, India
T. Balasubramanian*
Affiliation:
Department of Physics, Thin film Laboratory, National Institute of Technology, Tiruchirappalli 620015, India
*
a)Address all correspondence to this author. e-mail: bala@nitt.edu
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Abstract

In the present study, we report an activation and enhancement of room temperature ferromagnetism in pure ZnO and V-doped ZnO (Zn0.95V0.05O and Zn0.90V0.10O) thin films by trioctylphosphine (TOP) functionalization. X-ray diffraction patterns show a slight decrease in the intensity of the diffraction peak on TOP functionalization. Atomic force micrographs of pure and V-doped ZnO films reveal no disorder in the film surface on TOP functionalization. The chemical bond formation of TOP on ZnO film surface was examined by x-ray photoelectron spectroscopy measurements. Photoluminescence measurements of TOP-functionalized ZnO films show enhancements of UV emission and quenching of visible emission. TOP-functionalized ZnO films reveal enhanced ferromagnetic behavior as evidenced from vibrating sample magnetometer measurements.

Keywords

electronegativityfunctionalizationoxygen vacanciesferromagnetismVSM
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 1: Focus Issue: Synthesis of Nanostructured Functional Oxides , 14 January 2014 , pp. 158 - 165
Copyright
Copyright © Materials Research Society 2013 

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References

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