BiFeO₃ perovskites: A multidisciplinary approach to multiferroics

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• 作者：Maria Čebela^a ; Dejan Zagorac^a ; ^{dzagorac@vin.bg.ac.rs" class="auth_mail" title="E-mail the corresponding author} ; Katarina Batalović^b ; Jana Radaković^b ; Bojan Stojadinović^c ; Vojislav Spasojević^d ; Radmila Hercigonja^e
• 关键词：A. Powders ; chemical preparation ; B. X-ray methods ; C. Magnetic properties ; D. Perovskites
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：1256-1264
• 全文大小：992 K

文摘

Bismuth ferrite (BiFeO₃) is one of the most studied multiferroic system with a large number of published articles. This is mainly because BiFeO₃ material possesses both ferromagnetic and ferroelectric properties observed at room temperature, which opens great possibility for industrial and technological applications. Well-crystallized single-crystal BiFeO₃ nanopowder has been successfully synthesized with the hydrothermal method. The phase composition of the synthesized samples was determined by the x-ray diffraction (XRD) analysis, and the results showed that synthesized material crystallizes in the space group R3c as α-BiFeO₃ phase, which was confirmed by the previous experiments. In addition, a structure prediction has been performed and 11 additional BiFeO₃ modifications have been proposed. In the next phase, an ab initio optimization of predicted structures has been performed and the structure of the γ-form has been elucidated. Furthermore, electronic and magnetic properties of BiFeO₃ were investigated using combination of experimental and theoretical methods. Spectroscopic Ellipsometry has been used to study electronic properties of BiFeO₃, while magnetic behavior of synthesized material was investigated by SQUID. Finally, theoretical studies were performed using a full potential linearized augmented plane-waves plus local orbital (FP(L)APW+lo) method, based on density functional theory (DFT).