Effect of Nonmagnetic Ion Substitution on Multiferroic Properties of BiFeO3

Mandal, P. ; Sundaresan, A. (2021) Effect of Nonmagnetic Ion Substitution on Multiferroic Properties of BiFeO3 Journal of Electronic Materials, 50 (4). pp. 1772-1778. ISSN 0361-5235

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Official URL: http://doi.org/10.1007/s11664-020-08675-w

Related URL: http://dx.doi.org/10.1007/s11664-020-08675-w

Abstract

BiFeO3 is a ferroelectric and antiferromagnetic material at room temperature. In contrast to the weak ferromagnetism anticipated below TN = 640 K, it exhibits no macroscopic moment due to a cycloidal spin ordering. This study attempts to perturb the cycloidal spin ordering and improve the multiferroic properties by substitutions of Al and Sc at Fe site. The compounds BiFe1−xAlxO3 (0 ≤ x ≤ 0.3) and BiFe1−xScxO3 (0 ≤ x ≤ 0.2), synthesized at high pressures and temperatures, crystallize with perovskite structure in polar space group R3c. With increasing Al/Sc concentration, the compounds undergo marked changes in magnetic properties. While Al-substituted compounds were lossy and exhibited a Maxwell–Wagner effect, the Sc-substituted compounds exhibited ferroelectricity at room temperature.

Item Type:Article
Source:Copyright of this article belongs to Minerals Metals & Materials Society.
ID Code:119953
Deposited On:19 Jun 2021 12:32
Last Modified:19 Jun 2021 12:32

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