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Preparation, structural, and multiferroic properties of B-site ordered double-perovskite Bi2FeMnO6

Abstract

We report the structural, magnetic, and ferroelectric properties of double-perovskite Bi2FeMnO6 in which Fe3+ and Mn3+ cations are present with alternative ordering along [111] direction. High-flux synchrotron X-ray diffraction and high resolution transmission electron microscopy shows the pseudo-cubic lattice of Bi2FeMnO6 is consisted of alternatively corner-shared octahedra of FeO6 and MnO6. In the highly ordered Bi2FeMnO6 thin films, the unusual spin-glassy magnetic state is observed below 18 K by superconducting quantum interference device, and this is ascribed to the magnetic frustration at [111] Fe3+ and Mn3+ planes as indicated by X-ray magnetic circular dichroism measurements. Combining with the orbital model analysis based on Goodenough-Kanamori-Anderson rules, first-principles calculations and Monte Carlo simulations suggest the magnetic frustration is dominated by the long-range second nearest neighboring antiferromagnetic interactions of Fe3+-Fe3+ and Mn3+-Mn3+ and leads to the surprisingly weak magnetism. On the other hand, robust room-temperature ferroelectricity in Bi2FeMnO6 films is confirmed by piezoelectric force microscopy through electrically switching the polarization state and the ferroelectric retention.

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Publication details

The article was received on 06 Mar 2017, accepted on 08 May 2017 and first published on 08 May 2017


Article type: Paper
DOI: 10.1039/C7TC00974G
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    Preparation, structural, and multiferroic properties of B-site ordered double-perovskite Bi2FeMnO6

    L. Sun, Y. Fang, J. He, Y. Zhang, R. Qi, Q. He, R. Huang, P. Xiang, X. Tang, P. Yang, J. Chu, Y. Chu and C. Duan, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC00974G

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