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Synthesis and Elucidation of Structural, Morphological, Magnetic, and Electrical Properties of Al3+ Substituted Ba0.7Sr0.3Ti1 − xAlxO3 Perovskites

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Abstract

In this paper, the structural, morphological, magnetic, and electrical properties of Al3+ substituted Ba0.7Sr0.3Ti1 − xAlxO3 (where x = 0, 0.05, 0.10, 0.15, 0.20) perovskites were properly elucidated which were successfully synthesized by the standard solid-state reaction method. All the compositions were calcined at 700 °C for 4 h and sintered at 1150 °C for 4 h. The XRD patterns of all the prepared compositions were of single phase and showed good crystallinity. The crystalline phase was indexed as a simple cubic structure preferentially oriented along (110) plane. The lattice constant increased for the sample with Al content; x = 0.05 then decreased with further increase of Al content. FESEM images confirmed good microstructural and morphological properties with a homogeneous distribution of grains in the sample which was surrounded by a visible grain boundary. The result observed from VSM showed that all the compositions exhibited weak ferromagnetic properties at room temperature. The real part of complex permeability showed that the resonance frequency shifted towards higher frequency because Al3+ substitution and the quality factor increased at high frequency which indicated that the prepared perovskites had high-frequency magnetic applications. A high-quality factor was observed at a higher frequency which confirmed high-frequency dielectric applications of the prepared compositions. AC resistivity increased with the increase in Al content which indicated that the prepared perovskites had low eddy current loss characteristics.

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Acknowledgments

The authors greatly acknowledge the Department of Electrical and Electronic Engineering (EEE), University of Chittagong, Chittagong 4331, Bangladesh. The authors are thankful to the Materials Science Division, Atomic Energy Center, Dhaka 1000, Bangladesh, for extending their experimental facilities. The authors would also like to give thanks to the Bangladesh University of Engineering and Technology (BUET) for allowing them to use the Field Emission Scanning Electron Microscope (FESEM) facility.

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Authors and Affiliations

  1. Department of Computer Science and Engineering, University of Creative Technology, Chittagong (UCTC), Chittagong, 4212, Bangladesh

    N. Afsana

  2. Department of Electrical and Electronic Engineering, University of Chittagong, Chittagong, 4331, Bangladesh

    J. U. Ahamed

  3. Materials Science Division, Atomic Energy Center, Dhaka, 1000, Bangladesh

    M. N. I. Khan

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  1. N. Afsana
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Correspondence to J. U. Ahamed.

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Afsana, N., Ahamed, J.U. & Khan, M.N.I. Synthesis and Elucidation of Structural, Morphological, Magnetic, and Electrical Properties of Al3+ Substituted Ba0.7Sr0.3Ti1 − xAlxO3 Perovskites. J Supercond Nov Magn 33, 825–834 (2020). https://doi.org/10.1007/s10948-019-05249-8

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