Structural and electrical properties of La3+ doped BiFeO3 multiferroics

Javed Ahmad; Hafiza Maryam; Umair Nissar; S. H. Bukhari; M. Tufiq Jamil; J. Alam Khan

doi:10.1117/12.2575398

27 August 2020 Structural and electrical properties of La³⁺ doped BiFeO₃ multiferroics

Javed Ahmad, Hafiza Maryam, Umair Nissar, S. H. Bukhari, M. Tufiq Jamil, J. Alam Khan

Proceedings Volume 11561, First iiScience International Conference 2020; 115610B (2020) https://doi.org/10.1117/12.2575398
Event: First iiScience International Conference: Light Generation, Sensing & Energy Sources, 2020, Multan, Pakistan

Abstract

In the present work, BFO doped with Lanthanum has been synthesized by the Sol-Gel method. The wet chemical method is found suitable for the BFO synthesis as it is a low-temperature synthesis method and avoids evaporation of Bismuth from the BFO. The synthesized Bi_1-xLa_xFeO₃ (x = 0.0, 0.10, 0.15, 0.20, 0.25, 0.30) samples have been characterized by X-ray diffraction for structural analysis. The electrical properties of samples have been observed by measuring the room temperature and temperature-dependent dc electrical resistivity, and activation energy. The XRD patterns reveal almost a single crystalline phase of all the samples with only a few traces of an additional phase of Bi₂Fe₄O₉. The Lanthanum doped BFO is found to have a pseudo-cubic rhombohedral perovskite-type structure having space group R3c. The grain size calculated using the Scherrer formula is 27 nm for un-doped BFO and is found La-concentration dependent. The dc resistivity measurements reveal the semiconducting behavior of samples; resistivity increases on increasing the Laconcentration in BFO while decreases on increasing temperature. The La³⁺ ion which replaces Bi³⁺ in BFO stabilizes the perovskite structure by preventing Bi³⁺ loss due to volatilization and removes charge vacancies; thus improving the electrical properties of BFO.

Citation Download Citation

Javed Ahmad, Hafiza Maryam, Umair Nissar, S. H. Bukhari, M. Tufiq Jamil, and J. Alam Khan "Structural and electrical properties of La³⁺ doped BiFeO₃ multiferroics", Proc. SPIE 11561, First iiScience International Conference 2020, 115610B (27 August 2020); https://doi.org/10.1117/12.2575398

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