溶胶-凝胶法制备的 Y0.85La0.15Fe1-(4/3)xTixO3（其中 x = 0、0.025、0.05 和 0.075）纳米材料的结构和磁性能

IF 1.8 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

ECS Journal of Solid State Science and Technology Pub Date : 2024-08-06 DOI:10.1149/2162-8777/ad68a3

Sajini Kalakonda, Rama Sekhara Reddy Dachuru and Krishnaveni Gudela

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引用次数: 0

摘要

采用酒石酸辅助溶胶-凝胶法制备了 Y0.85La0.15Fe1-(4/3)xTixO3（其中 x = 0、0.025、0.05 和 0.075）纳米材料。合成的纳米材料采用了多种分析表征技术，如 X 射线粉末衍射 (XRD)、扫描电子显微镜 (SEM)、X 射线光电子能谱 (XPS)、紫外-可见吸收、振动样品磁力计 (VSM) 和介电光谱。通过 XRD 研究观察到，随着铁位点上钛浓度的增加，(121) 和 (002) 平面向下移动。通过漫反射光谱的研究，制备的纳米粉体吸收可见光的能力得到了证实，其带隙从 2.13 eV 下降到 2.06 eV。XPS 研究表明，Y 原子和 La 原子处于 +3 氧化态，Fe 原子处于混合（+2 和 +3）氧化态，Ti 原子处于混合（+3 和 +4）氧化态。通过 VSM 研究，x = 0.05 样品的磁化值最高。在 Y0.85La0.15Fe1-(4/3)xTixO3（其中 x = 0.05）中也观察到了高介电常数、低介电损耗和低电导率值。

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Structural and Magnetic Properties of Y0.85La0.15Fe1−(4/3)xTixO3 (where (x = 0, 0.025, 0.05 and 0.075) Nanomaterials Derived from Sol-Gel Route

Y0.85La0.15Fe1−(4/3)xTixO3 (where (x = 0, 0.025, 0.05 and 0.075) nanomaterials were prepared using tartare acid assisted sol-gel method. Various analytical characterization techniques such as X-ray powder diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), UV–vis absorption, Vibrating-sample magnetometer (VSM) and dielectric spectroscopy were employed to characterize the synthesized nanomaterials. Downward shifted of (121) and (002) planes were observed with an increasing of Ti concentration at Fe site through XRD study. The ability of the prepared nano-powders to absorb visible light was demonstrated by the investigation of diffuse reflectance spectra, which showed a decline in bandgap from 2.13 eV to 2.06 eV. XPS studies revealed that Y and La atoms are existed in +3 oxidation state, Fe atom is existed in mixed (+2 and +3) oxidation state and Ti atom is existed in mixed (+3 and +4) oxidation state. The highest magnetization value was observed for x = 0.05 sample through VSM study. High dielectric constant, low dielectric loss and low conductivity values were also observed for Y0.85La0.15Fe1−(4/3)xTixO3 (where (x = 0.05)).

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来源期刊

ECS Journal of Solid State Science and Technology MATERIALS SCIENCE, MULTIDISCIPLINARY-PHYSICS, APPLIED

CiteScore

4.50

自引率

13.60%

发文量

455

期刊介绍： The ECS Journal of Solid State Science and Technology (JSS) was launched in 2012, and publishes outstanding research covering fundamental and applied areas of solid state science and technology, including experimental and theoretical aspects of the chemistry and physics of materials and devices. JSS has five topical interest areas: carbon nanostructures and devices dielectric science and materials electronic materials and processing electronic and photonic devices and systems luminescence and display materials, devices and processing.