Spin dynamic and magneto optical studies on mixed ferrites nanofluids and nanocomposites
Creators: name: Kumar, Prashant
Publisher: name: RMIT University
Year: 2025
Subjects: classificationCode: 510404
subject: Electronic and magnetic properties of condensed matter; superconductivity

description: The remarkable progress in the field of nanotechnology has paved the way for the development of novel materials with unique properties and enhanced functionalities. Among these, materials, mixed ferrites nanofluids and nanocomposites have gained significant attention due to their intriguing magnetic and optical properties. These materials exhibit a combination of ferromagnetic and ferrimagnetic behavior, making them suitable for various technological applications such as data storage, sensors, spintronics, and biomedical devices. Understanding the spin dynamics and magneto-optical properties of these materials is crucial for their effective utilization and further advancement. In recent years, extensive research has been carried out to investigate the spin dynamics of mixed ferrites nanofluids and nanocomposites. The spin dynamics refer to the behavior of electron spins within a material under the influence of an external magnetic field. This field of study is of great importance as it provides valuable insights into the magnetic properties, such as magnetization dynamics, spin relaxation, and magnetic resonance, which are vital for designing efficient magnetic devices. One of the primary techniques employed to explore the spin dynamics in these materials is ferromagnetic resonance (FMR) spectroscopy. FMR spectroscopy allows the direct observation of electron spin resonance transitions and provides information about the magnetic interactions, spin-lattice relaxation, anisotropy and g-factor. By utilizing FMR spectroscopy, researchers have successfully investigated the spin dynamics in various mixed ferrites nanofluids and nanocomposites, shedding light on their unique magnetic behaviors. The field of spin dynamics deals with the behavior of electron spins in response to external magnetic fields and their interactions with other spins. Understanding spin dynamics is crucial for the design and development of advanced magnetic materials, as it governs the material's magnetic behavior and influences its potential applications. By investigating the spin dynamics of mixed ferrites, we aim to gain insights into the mechanisms behind their enhanced magnetic properties and shed light on their potential applications in areas such as data storage, spintronics, and magnetic sensors. In addition to spin dynamics, the magneto-optical (MO) properties of mixed ferrites nanofluids and nanocomposites have also attracted significant interest. The magneto-optical effects arise due to the interaction between light and the magnetization in a material. By examining the magneto-optical response of these materials, we can uncover their unique optical properties, including the Faraday and Kerr effects. These effects can be utilized in devices such as magneto-optical switches, isolators, and sensors. Understanding these effects is essential for the development of advanced magneto-optical devices such as magneto-optical sensors, isolators, and modulators. By studying the magneto-optical properties of mixed ferrites nanofluids and nanocomposites, researchers aim to enhance their understanding of the underlying mechanisms and explore their potential applications in the field of photonics. Several experimental techniques, including magneto-optical Kerr effect (MOKE) spectroscopy and Faraday rotation measurements, have been employed to investigate the magneto-optical properties of these materials. Nano-MOKE-III spectroscopy provides valuable information about the magnetic anisotropy, magnetization reversal processes, and magneto-optical constants, while Faraday rotation measurements offer insights into the magneto-optical activity and Verdet constant. By understanding the magneto-optical behavior of mixed ferrite nanofluids and nanocomposites, we aim to unlock their potential for the development of advanced optical devices.

In this study, we aim to contribute to the growing body of knowledge on the spin dynamics and magneto-optical properties of mixed ferrites nanofluids and nanocomposites. By employing advanced experimental techniques and theoretical models, we seek to uncover the intricate interplay between the magnetic and optical properties in these materials. The obtained results will not only deepen our understanding of their fundamental behavior but also pave the way for the development of innovative applications in the fields of spintronics, information storage, and magneto-optical devices. Through this study, we aspire to contribute to the existing knowledge and foster further advancements in this exciting and rapidly evolving field.