Synthesis and Characterization of Doped Magnetite Materials Based on Novel Application of Spintronics

Abstract

newline Diverse practical applications of spinel ferrite of the type MFe2O4 have attracted attention of researcher s from decades. Nano-size magnetite exhibit unique properties which enable their use in a wide range of applications such as high density, high frequency devices. The synthesis of magnetite has been received great interest in recent years because of new physical, chemical and magnetic properties of materials at nanoscale. The synthesis of magnetite leads to wide range of specific technological applications, among crystal polymorphs of iron. Magnetite (Fe3O4) is a promising candidate for its biocompatibility and biodegradable activity. newlineSpintronics or spin based electronics, aims at exploiting the electron to develop a new generation of electronic devices. In the proposed research work the motivation, physics fundamentals and scope of Spintronics will be briefly addressed. Magnetite (Fe3O4) is a famous example. Magnetite, which is natural mineral, is a genuine ferrite. Recent interest of the researcher in the bulk ferrite is diminish in the scenario of futuristic advanced material developments. Recently traditional magnetism of spinel ferrite ultimately leads to frontier area of Spintronics. Ferrites like MnFe2O4, CoFe2O4 have been investigated as spin filter. newlineThe objectives of the research proposal is synthesis of doped (Co, Al, Ca etc.) element with magnetite material, study the different properties, study the effect of doping on the structure of the magnetite, characterization of magnetite material for the application of spintronics. The element doped with magnetite material will be synthesized by sol-gel auto combustion technique. newlineSamples will be characterized by using structural characterization techniques such as X-Ray Diffraction Method (XRD), Field Emission Scanning Electron Microscope (FESEM), Fourier Transform Infra-Red Spectroscopy (FTIR); Ultra-Violet Visible Spectrometer (UV-Vis) for optical characterization and Vibration Scanning Magnetometer (VSM) for magnetic characterization. newlineThis report has been organized into five chapters, newlineChapter 1 gives introduction, ferrimagnetism concept, and ferromagnetic materials, discussed crystal structures and magnetism in magnetite. Origin of spintronics, magnetic materials, and emphasis on spintronics materials. It also deals with the literature review regarding half metals, synthesis of magnetite and analysis of doped ferrite materials. Literature survey reported regarding Fe3O4 and spintronics applications. In this chapter also explained selection of materials, and discussed the applications of doped materials. newlineChapter 2 first part explains the synthesis method with detail steps, also discusses advantage of synthesis and second part explains detail experimental work of synthesis of magnetite and doped magnetite nanoparticles. newlineChapter 3 explains the structural, morphological and magnetic characterization techniques also explained the technical specifications of the instrument and various instrumental parameters maintained during the characterization of samples. newlineChapter 4 explains results and discussion of doped element such as Co2+ ions , Al3+ ion and Ca2+ ion in magnetite and their influence on the structural, morphological, optical, magnetic properties of the pure (Fe3O4) magnetite and doped (Fe3O4) magnetite nanoparticles and lastly comparative study has been included. newlineChapter 5 gives the major conclusions of the present study. It concludes cobalt, aluminum and calcium doped magnetite of structural, optical and magnetic behavior for spintronics applications. newlineAfter chapter 5, Future Scope of the work and the papers published/ presented in SCI and Scopus/ International conferences are given in Appendix-I respectively. newline