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

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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.

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ACKNOWLEDGMENT

The authors acknowledge the DST, Government of India for the VSM facility under the FIST program sanctioned to the Department of Physics, NIT, Tiruchirappalli.

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  1. Department of Physics, Thin film Laboratory, National Institute of Technology, Tiruchirappalli, 620015, India

    G. Jayalakshmi & T. Balasubramanian

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Correspondence to T. Balasubramanian.

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Jayalakshmi, G., Balasubramanian, T. Realization of enhanced room temperature ferromagnetism in pure and V-doped ZnO films on TOP functionalization. Journal of Materials Research 29, 158–165 (2014). https://doi.org/10.1557/jmr.2013.359

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