Investigation of Sr-Doped BiFeO3 Synthesized by Sol–Gel Route

IF 0.9 4区 物理与天体物理 Q4 PHYSICS, CONDENSED MATTER Physics of the Solid State Pub Date : 2025-01-14 DOI:10.1134/S1063783424601723
Sachin D. Rajadhyax, Sangeeta G. Dahotre, Rajib Mondal, Rosni Roy, Pranav P. Naik, Snehal Hasolkar
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Abstract

The Sr-doped bismuth ferrite nanoparticles with chemical formula Bi1–xSrxFeO3 (x = 0.1, 0.2, 0.3, 0.4, and 0.5) were prepared via facile sol–gel method. A detailed investigation was conducted into the effects of substituting divalent Sr2+ at the Bi3+ site on the structural, morphological, magnetic, and electrical characteristics. The XRD study revealed the occurrence of structural transformation in the samples upon doping. The reduction in crystallite size can be attributed to the creation of oxygen vacancies. The morphological analysis carried out using field emission scanning electron microscopy (FESEM) further validated this theory. The increasingly greater lattice distortion with doping is in line with the increasing value of microstrain for increasing doping concentrations. The improving stability of the structure with increasing doping concentration was confirmed by the increasing value of the tolerance (T) factor. The FESEM micrographs reveal the change in morphology of the particles upon doping. The EDS results confirm the expected presence of the constituent elements Sr, Bi, Fe, and O in permissible proportions. The M–H curve reported at 3 K and at ambient temperature both confirmed the appreciable increase in magnetization with increasing doping concentration. The investigation of the dielectric properties of the samples was performed using an LCR meter operating in the frequency range of 10 Hz–8 MHz. The results showed a marked increase in the value of the dielectric constant with an increase in doping concentration. The increasing resistivity of the doped BFO samples is confirmed by the significant values of grain resistance as indicated by the Cole-Cole plots. The good ferroelectric properties of the samples are revealed by the P–E loops and may find potential applications in spintronic devices and microwave devices. The P–E loops reveal the good ferroelectric nature of the samples and can have potential applications in spintronic devices and microwave devices.

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溶胶-凝胶法制备sr掺杂BiFeO3的研究
采用溶胶-凝胶法制备了化学式为Bi1-xSrxFeO3 (x = 0.1, 0.2, 0.3, 0.4, 0.5)的掺锶铋铁氧体纳米颗粒。详细研究了在Bi3+位点上取代二价Sr2+对结构、形态、磁性和电学特性的影响。XRD研究表明,掺杂后样品发生了结构转变。晶体尺寸的减小可归因于氧空位的产生。利用场发射扫描电镜(FESEM)进行的形态分析进一步验证了这一理论。随着掺杂的增加,晶格畸变越来越大,这与微应变随掺杂浓度的增加而增加是一致的。容差(T)因子的增大证实了结构的稳定性随掺杂浓度的增加而提高。FESEM显微照片揭示了掺杂后颗粒形貌的变化。能谱分析结果证实了预期的组成元素Sr、Bi、Fe和O在允许比例下的存在。在3k和室温下的M-H曲线都证实了磁化强度随掺杂浓度的增加而明显增加。使用LCR计在10 Hz-8 MHz频率范围内工作,对样品的介电特性进行了研究。结果表明,随着掺杂浓度的增加,介电常数的值显著增加。在Cole-Cole图中,晶粒电阻的显著值证实了掺杂BFO样品的电阻率增加。P-E环揭示了样品良好的铁电性能,在自旋电子器件和微波器件中有潜在的应用前景。P-E环显示了样品良好的铁电性质,在自旋电子器件和微波器件中具有潜在的应用前景。
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来源期刊
Physics of the Solid State
Physics of the Solid State 物理-物理:凝聚态物理
CiteScore
1.70
自引率
0.00%
发文量
60
审稿时长
2-4 weeks
期刊介绍: Presents the latest results from Russia’s leading researchers in condensed matter physics at the Russian Academy of Sciences and other prestigious institutions. Covers all areas of solid state physics including solid state optics, solid state acoustics, electronic and vibrational spectra, phase transitions, ferroelectricity, magnetism, and superconductivity. Also presents review papers on the most important problems in solid state physics.
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