Engineering 0.8BiFeO3–0.2BaTiO3 multiferroics with improved dielectric and magnetic properties via samarium doping

IF 3.9 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
RSC Advances Pub Date : 2025-01-22 DOI:10.1039/D4RA08068H
Houda Krir, F. Gadhoumi, N. Abdelmoula, M. Tabellout, H. Khemakhem and N. Randrianantoandro
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Abstract

Samarium (Sm) modification is emerging as a powerful strategy to manipulate the electrical response of 0.8BiFeO3–0.2BaTiO3 (BFBT) multiferroic ceramics. In this work, Sm-doped BFBT (BFBT05Sm and BFBT01Sm) are successfully synthesized via the solid–state reaction technique. X-ray diffraction (XRD) analysis coupled with Rietveld refinement confirms the formation of a pure perovskite structure with rhombohedral symmetry (R3c space group) for all compositions, indicating the effective integration of Sm into the BFBT lattice. In particular, scanning electron microscopy (SEM) reveals a remarkable increase in grain size upon Sm doping, reaching 1.098 μm in BFBT01Sm compared to 0.192 μm in the BFBT sample. Further evidence for the R3c space group comes from Raman spectroscopy, which reveals identical vibrational modes in all samples. Most importantly, the Sm substitution significantly reduces the dielectric loss compared to BFBT. A comprehensive analysis of the Mössbauer spectral parameters reveals the influence of Sm doping on the magnetic interactions.

Abstract Image

通过钐掺杂改善介电和磁性能的0.8BiFeO3-0.2BaTiO3多铁质材料
钐(Sm)改性是一种控制0.8BiFeO3-0.2BaTiO3 (BFBT)多铁陶瓷电响应的有效策略。本文通过固相反应技术成功合成了sm掺杂BFBT (BFBT05Sm和BFBT01Sm)。x射线衍射(XRD)分析结合Rietveld细化证实了所有成分都形成了具有菱形对称(R3c空间群)的纯钙钛矿结构,表明Sm有效地集成到BFBT晶格中。扫描电镜(SEM)显示,Sm掺杂后,BFBT01Sm的晶粒尺寸明显增大,达到1.098 μm, BFBT样品的晶粒尺寸为0.192 μm。R3c空间群的进一步证据来自拉曼光谱,它揭示了所有样本中相同的振动模式。最重要的是,与BFBT相比,Sm取代显著降低了介电损耗。通过对Mössbauer光谱参数的综合分析,揭示了Sm掺杂对磁相互作用的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
RSC Advances
RSC Advances chemical sciences-
CiteScore
7.50
自引率
2.60%
发文量
3116
审稿时长
1.6 months
期刊介绍: An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.
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