Abstract
Nd-doped TiO2 nanoparticles of different concentration are synthesized using a wet chemical route, followed by structural, optical and magnetic property examination. X-ray diffraction of the Nd-doped samples exhibits a tetragonal type anatase crystal structure similar to that of the pure TiO2. Crystallite size and strain of the nanoparticles are calculated by Scherrer’s and Williamson–Hall equation. FTIR shows the existence of functional groups at the conjunction of TiO2 nanoparticles and thereby confirming strong chemical bonding. Microstructural investigation of the prepared samples by FESEM and HRTEM shows the presence of nano-sized irregular spherical-shaped particles. The presence of defects and vacancies is observed by multicolour PL emission spectra. Further, availability of unpaired electrons and paramagnetic centres of Nd-doped samples is been identified by EPR spectra. The magnetic analysis reveals that pure TiO2 show weak ferromagnetic behaviour, whereas the Nd-doped TiO2 samples exhibit unsaturated ferromagnetic behaviour at high field, which delivers the interesting interaction between dopant and host lattice.
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Acknowledgement
The authors gratefully acknowledge DST, New Delhi for providing financial support to carry out this research work under PURSE II scheme. One of the authors Mrs. Nithyaa. N is thankful to DST, New Delhi for the award of DST-PURSE fellowship.
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Nithyaa, N., Victor Jaya, N. Effect of Nd on structural, optical and magnetic behaviour of TiO2 nanoparticles. Appl. Phys. A 127, 69 (2021). https://doi.org/10.1007/s00339-020-04140-x
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DOI: https://doi.org/10.1007/s00339-020-04140-x