Abstract
Yttrium oxide (Y2O3) doped with Dy3+ & Eu3+ nanoparticle has been synthesized by solution combustion method. The formation of the compounds has been checked by X-ray diffraction method. The crystallite/particle size has been measured using Scherrer formula as well as by transmission electron microscopy which show that the size of the particles are in the nanorange. The frequency and temperature dependent variation of impedance Z*, dielectric constant (ε′), dielectric loss (ε″) and AC conductivity (σ) of Y2O3: Dy3+ & Eu3+ nanoparticles were also measured. The real and imaginary part of complex impedance makes semicircle in the complex plane. The center of semicircle arc is found to be shifted toward higher value of real part of impedance with increasing temperature. This indicates that the conductivity of the material increases with the increase in temperature. Cole–Cole plots demonstrate that the dielectric relaxation process occurs in the material. The AC conductivity (σ AC) increases with the increase in temperature within the frequency range of 103–107 Hz confirming the hopping of the electrons in the conduction process. The value of impedance decreases sharply with increasing frequency and attains minimum value after 105 Hz at all temperatures.
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Acknowledgments
Financial assistance from BRFST-IPR, Gandhinagar, Gujarat, for the present work is gratefully acknowledged. Authors Aradhana Jyotsana and Gulab Singh Maurya are thankful to BRFST-IPR for providing the financial support as J.R.F. and SRF, respectively. One of authors (AKS) would like to thank to Department of Science and Technology for DST Young Scientist financial support. The authors are also thankful to Dr. M. Roy, M.L. Sukhadia University, and Udaipur for his valuable comments and suggestions. Authors gratefully acknowledge SAIF, Chandigarh, Panjab University for providing the XRD and TEM facility and Prof. Ram Kripal for providing impedance spectroscopy experimental facility.
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Jyotsana, A., Maurya, G.S., Srivastava, A.K. et al. Synthesis and electrical properties of Y2O3: Dy3+ & Eu3+ nanoparticles. Appl. Phys. A 117, 1269–1274 (2014). https://doi.org/10.1007/s00339-014-8516-y
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DOI: https://doi.org/10.1007/s00339-014-8516-y