Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 259, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2020.124053
Keywords
Sol-gel synthesis; Multiferroics; Yttrium chromite nanoparticles; Rietveld refinement; Electrical transport properties; Magnetic properties
Categories
Funding
- SERB, Department of Science and Technology (DST), Government of India [EMR/2016/004926]
- Centre of Excellence in Advanced Materials, NIT Durgapur
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Erbium doping in YCO nanoparticles leads to a decrease in band gap, changes in dc conductivity and dielectric permittivity, as well as a relaxor-like ferroelectric phase transition and magnetic ordering. These effects are essential for the successful application of YCO nanoparticles in devices.
Erbium (Er) doped perovskite YCrO3 (YCO) nanoparticles were successfully prepared by the sol-gel method. The crystal structure, optical, electrical, and magnetic properties of the samples were characterized. The effect of erbium doping was studied by Rietveld refinement analysis. UV-vis absorption data show that with the increase of doping concentration the band gap decreases. The result of electrical properties indicates that the increase of temperature dc conductivity increases and dielectric permittivity follows the modified Cole-Cole model. Ac conductivity variation with frequency has been explained by CBH (correlated barrier hopping) conduction mechanism. From the complex impedance plot, the existence of the grain boundary contribution to the relaxation in the sample can be seen. A relaxor like ferroelectric phase transition is observed at 450 K. The observation of the hysteresis loop and the increase of magnetization value by Er doping confirmed the magnetic ordering in YCO nanoparticles. Our results demonstrate the effect of Er doping on structural, electrical and magnetic properties of YCO nanoparticles which is essential for its successful device application.
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