Abstract
Room-temperature multiferroic properties in Mg-doped ZnO samples are reported wherein Mg replaces Zn in the ZnO matrix and retains hexagonal wurtzite structure. The saturation magnetisation is increased from ∼2×10−4 emu/g to 3×10−4 emu/g for the dilute doping of 2 % Mg in pure ZnO and the ferroelectricity is also increased. Higher concentration of Mg does not lead to a significant enhancement in the magnetisation but improves the ferroelectric properties. An X-ray absorption spectroscopic study shows an enhancement in O vacancies with dilute doping of Mg. The origin of the multiferroic behaviour is understood based on their crystal and electronic structures.
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Acknowledgements
The authors would like to thank IUAC, New Delhi for the XRD facility and Dr. Anurag Gaur, NIT Kurukshetra and Ms. Rekha Gupta, research scholar, Delhi University for their help during the experiment. The authors S.G. and K.H.C. are thankful to Prof. J.M. Chen (NSRRC) for the synchrotron experimental support and discussions. One of us (K.A.) acknowledges the financial support of DST under the Indo–Russian project No. INTRFBR/P-72.
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Kumar, P., Kumar, Y., Malik, H.K. et al. Possibility of room-temperature multiferroism in Mg-doped ZnO. Appl. Phys. A 114, 453–457 (2014). https://doi.org/10.1007/s00339-013-7664-9
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DOI: https://doi.org/10.1007/s00339-013-7664-9