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Issue 1, 2020
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Tunable physical properties in BiAl1−xMnxO3 thin films with novel layered supercell structures

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Abstract

Morphological control in oxide nanocomposites presents enormous opportunities for tailoring the physical properties. Here, we demonstrate the strong tunability of the magnetic and optical properties of Bi-based layered supercell (LSC) multiferroic structures, i.e., BiAl1−xMnxO3, by varying the Al : Mn molar ratio. The microstructure of the LSC structure evolves from a supercell structure to Al-rich pillars in the supercell structure as the Al molar ratio increases. The LSC structures present excellent multiferroic properties with preferred in-plane magnetic anisotropy, a tunable band gap and anisotropic dielectric permittivity, all attributed to the microstructure evolution and their anisotropic microstructure. Three different strain relaxation mechanisms are identified that are active during thin film growth. This study provides opportunities for microstructure and physical property tuning which can also be explored in other Bi-based LSC materials with tailorable multiferroic and optical properties.

Graphical abstract: Tunable physical properties in BiAl1−xMnxO3 thin films with novel layered supercell structures

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Supplementary files

Article information


Submitted
05 Sep 2019
Accepted
22 Nov 2019
First published
22 Nov 2019

This article is Open Access

Nanoscale Adv., 2020,2, 315-322
Article type
Paper

Tunable physical properties in BiAl1−xMnxO3 thin films with novel layered supercell structures

S. Misra, L. Li, X. Gao, J. Jian, Z. Qi, D. Zemlyanov and H. Wang, Nanoscale Adv., 2020, 2, 315
DOI: 10.1039/C9NA00566H

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