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Synthesis and Characterization of Fe-Doped CdSe Nanoparticles as Dilute Magnetic Semiconductor

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Abstract

Cd1−x Fe x Se (0≤x≤0.1) nanoparticles were synthesized by hydrothermal method. The solubility limit of Fe in CdSe nanoparticles was found to be less than 6 % as obtained from X-ray diffraction (XRD) study. With the increase in doping concentration at and above it, secondary phase of FeSe2 starts appearing. The presence of Cd, Se, and Fe has been confirmed by energy dispersive X-ray spectroscopy (EDS). The increase in band gap value has been confirmed by UV-visible spectra and the variation in emission intensity of photoluminescence (PL) measurements further indicates the incorporation of Fe in CdSe nanoparticles. Transmission electron microscopy (TEM) reveals the spherical nature of synthesized nanoparticles, and the particle size decreases with increasing Fe doping concentration. Fourier transform Infrared spectra (FTIR) confirm the capping of sodium dodecyl sulfate (SDS) surfactant on pure and Fe-doped CdSe nanoparticles. The synthesized nanoparticles show room-temperature ferromagnetic behavior, and the saturation magnetization value was found to increase with Fe doping concentration.

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Acknowledgements

The authors gratefully acknowledge Defense Research & Development Organization (DRDO), India, for providing generous financial support for this work, and IIT Delhi for the SQUID measurements.

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  1. Nano Research Lab, School of Physics & Materials Science, Thapar University, Patiala, 147004, Punjab, India

    Jaspal Singh & N. K. Verma

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  1. Jaspal Singh
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  2. N. K. Verma
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Correspondence to Jaspal Singh.

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Singh, J., Verma, N.K. Synthesis and Characterization of Fe-Doped CdSe Nanoparticles as Dilute Magnetic Semiconductor. J Supercond Nov Magn 25, 2425–2430 (2012). https://doi.org/10.1007/s10948-012-1631-0

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