Abstract Bi0.8Gd0.2Fe0.95Ti0.05O3 (BGFT) multiferroic ceramics were prepared by a solid-state reaction, and their sintering, microstructure, dielectric and magnetic properties were studied. Experimental results show that BGFT ceramics sintered at 980 °C possess a pure orthorhombic (space group, Pnma) structure, and these ceramics possess high relative theoretical density (∼95%), low leakage current density (10−6 A/cm2). The magnetic and electric measurements show the coexistence of ferroelectric and weak ferromagnetic in BGFT ceramics. The results of the Rietveld refinement for BGFT ceramics reveal the existence of bismuth and oxygen vacancies, and these vacancies have an important influence on the electric and magnetic properties.

中文翻译：

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Gd和Ti共掺杂BiFeO3的Rietveld细化和多铁性

摘要 采用固相反应制备Bi0.8Gd0.2Fe0.95Ti0.05O3(BGFT)多铁性陶瓷，并对其烧结、显微结构、介电和磁性能进行了研究。实验结果表明，在 980 °C 下烧结的 BGFT 陶瓷具有纯正交（空间群，Pnma）结构，这些陶瓷具有较高的相对理论密度（~95%）和低漏电流密度（10-6 A/cm2）。磁和电测量表明BGFT陶瓷中铁电和弱铁磁共存。BGFT 陶瓷的 Rietveld 细化结果揭示了铋和氧空位的存在，这些空位对电性能和磁性能有重要影响。