Guganathan Loganathan, Rajeevgandhi Chinnaiyan, Sathiyamurthy Kaliyamurthy, Thirupathi Kokila, Santhamoorthy Madhappan, Chinnasamy Ellappan, Raorane Chaitany Jayprakash, Raj Vinit, Kim Seong-Cheol, Anand Pichapillai
Department of Physics, Annmalai University, Annamalainagar, Chidambaram 608002, Tamilnadu, India.
Freelance Researcher, Chidambaram 608001, Tamilnadu, India.
Gels. 2022 Oct 25;8(11):688. doi: 10.3390/gels8110688.
In this manuscript, we present the synthesis of gadolinium orthoferrite nanoparticles using the sol-gel auto-combustion technique. The obtained gadolinium orthoferrite nanoparticles were annealed at various temperatures, such as 800 °C, 900 °C, 1000 °C, and 1100 °C. The synthesized materials were analyzed by various instrumental characterizations. The vibrational characteristics of the synthesized samples were verified by FTIR. The surface morphology of the gadolinium orthoferrite nanoparticles was analyzed by FE-SEM and HR-TEM, revealing their spherical structural morphology and uniform particle structure. The presence of the elemental features was analyzed in the gadolinium orthoferrite nanoparticles by EDAX. The surface analysis of the core ranges of the XPS-recorded spectra were obtained for the elemental states of the Gd, Fe, and O factors in the samples, and it additionally characterized the different levels of oxidative states by fitting the levels of the high-resolution parameters of Gd 4d, Fe 2p, and O 1s. The magnetic properties of the samples were investigated by VSM. The measurement of the magnetic parameters revealed that gadolinium orthoferrite nanoparticles exhibit a ferromagnetic nature.
在本论文中，我们介绍了采用溶胶-凝胶自燃烧技术合成钆铁氧体纳米颗粒的方法。所制备的钆铁氧体纳米颗粒在800℃、900℃、1000℃和1100℃等不同温度下进行了退火处理。通过各种仪器表征手段对合成的材料进行了分析。利用傅里叶变换红外光谱（FTIR）验证了合成样品的振动特性。通过场发射扫描电子显微镜（FE-SEM）和高分辨率透射电子显微镜（HR-TEM）分析了钆铁氧体纳米颗粒的表面形貌，揭示了它们的球形结构形态和均匀的颗粒结构。利用能量散射X射线能谱（EDAX）分析了钆铁氧体纳米颗粒中元素特征的存在情况。通过X射线光电子能谱（XPS）记录的光谱对样品中钆（Gd）、铁（Fe）和氧（O）元素的核心范围进行了表面分析，并通过拟合Gd 4d、Fe 2p和O 1s的高分辨率参数水平进一步表征了不同的氧化态水平。利用振动样品磁强计（VSM）研究了样品的磁性。磁性参数的测量结果表明，钆铁氧体纳米颗粒具有铁磁性。
