Abstract
In this communication, we report the results of the studies on electrical properties of cost-effective modified sol–gel-grown nanostructured Gd0.95Ca0.05MnO3 (GCMO) manganites sintered at different temperatures. Structural investigations, carried out using X-ray diffraction measurements, reveal the single-phasic nature of GCMO samples having orthorhombic unit cell structure. Frequency-dependent variation in AC conductivity (σ AC) has been discussed on the basis of correlated barrier hopping (CBH) mechanism for the GCMO samples sintered at lower temperatures. Sintering temperature-induced transition from CBH mechanism to Maxwell–Wagner relaxation processes has been discussed in detail. Size-induced modifications in the impedance response of the samples have been understood, in detail, using size effects and Cole–Cole plots.
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Acknowledgments
Author ZJ is thankful to Department of Physics, Saurashtra University, Rajkot, and UGC, New Delhi, for financial support in the form of UGC (BSR) Meritorious Fellowship [File No.: F.25-1/2013-14(BSR)/7-156/2007(BSR)]. Author KG is thankful to Inter-University Accelerator Centre, New Delhi, for financial assistance in the form of junior research fellowship (File No.: BTR 57309).
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Thakrar, K., Dhruv, D., Rathod, K.N. et al. Size-controlled electrical properties of sol–gel-grown nanostructured Gd0.95Ca0.05MnO3 . J Sol-Gel Sci Technol 79, 144–150 (2016). https://doi.org/10.1007/s10971-016-4031-2
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DOI: https://doi.org/10.1007/s10971-016-4031-2