Abstract
Multiferroic nanocomposite samples (1 − x) BiFeO3-xCo0.7Ni0.3Fe2O4 (x = 0.0, 0.2, 0.5, 0.8, 1.0) were prepared by the hybrid processing method. The X-ray diffraction technique is used to confirm the formation of the ferroelectric (BiFeO3) and ferromagnetic (Co0.7Ni0.3Fe2O4) phases. The nature of metal–oxygen bonding in the multiferroic samples was identified by Fourier transform infrared (FTIR) spectroscopy analysis. The frequency dependence of AC conductivity suggests that the samples obey the power law Aωs. The value of frequency exponent ‘s’ was found to decrease with increasing temperature suggesting the correlated barrier hopping (CBH) model as the most suitable mechanism to explain the transport properties of the samples. The hopping distance increases with increasing the content of the ferromagnetic phase in the nanocomposites (2.02 Å for x = 0.0 to 6.71 Å for x = 1.0). The Arrhenius plot analysis of AC conductivity confirms the presence of different conduction processes in low and high temperature regions. The enhancement in magnetization (Ms) is observed with increasing the content of the ferromagnetic phase (9.18 emu gm−1 for x = 0.2 to 36.19 emu gm−1 for x = 0.8 nanocomposites).
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Acknowledgments
This work is supported by the Council of Scientific and Industrial Research (CSIR) New Delhi for financial assistance to one of the authors, Huidrom Hemanta Singh (SRF, CSIR, File No. 09/476(0079)/2017-EMR-I). The authors are thankful to the NIT, Manipur for extending the valuable facilities for taking XRD and FTIR measurements. They are also thankful to Central Instrumentation Facility (CIF), IIT Guwahati for VSM measurement and STIC, Cochin University of Science and Technology Cochin, Kerala for SEM measurement.
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Singh, H.H., Sharma, H.B. Structural, transport and magnetic properties of (1-x) BiFeO3-xCo0.7Ni0.3Fe2O4 nanocomposite samples (x = 0.0, 0.2, 0.5, 0.8, 1.0). Adv Compos Hybrid Mater 3, 609–620 (2020). https://doi.org/10.1007/s42114-020-00157-1
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DOI: https://doi.org/10.1007/s42114-020-00157-1