Complex impedance spectroscopy of Mn-doped zinc oxide nanorod films |
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Authors: | M.K. Sharma A.K. Pal Ratnamala Chatterjee |
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Affiliation: | a Magnetics and Advanced Ceramics Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, Indiab Department of Instrumentation Science, USIC Building, Jadavpur University, Calcutta 700 032, Indiac Inter University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067, India |
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Abstract: | The frequency-dependent properties of Mn-doped (3-5 at.%) aligned zinc oxide (Mn-ZnO) nanorods, synthesized by hybrid wet chemical route onto glass substrates, were investigated by bias-dependent impedance spectroscopy. No peak of Mn cluster/secondary phases was detected in the X-ray diffraction traces of the samples. XPS studies show the presence of oxygen vacancies in Mn-ZnO nanorods and Mn in Mn2+ and Mn4+ charge states. Although X-ray diffraction/X-ray photoelectron spectroscopy does not give any indication of the presence of metal clusters in the samples, bias-dependent impedance spectroscopy demonstrates significant sensitivity to the formation of Mn clusters in Mn-ZnO nanorods. |
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Keywords: | A. ZnO nanorods B. Mn doping D. Impedance spectroscopy D. X-ray photoelectron spectroscopy |
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