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Magnetic Resonators

Feedback with Magnetic Field and Magnetic Cavity

  • Book
  • © 2022

Overview

Authors:
  1. C. S. Nikhil Kumar

    1. Postdoc at Institute of Spintronics and Quantum Information, Faculty of Physics, Adam Mickiewicz University, Poznan, India

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  • Highlights the design of Spin-Torque Nano Oscillators(STNOs) and the necessary feedback for phase locking
  • Discusses coherent oscillations produced by STNOs placed within magnonic crystal cavities
  • Includes numerical analysis and micromagnetics to validate the design

Part of the book series: SpringerBriefs in Applied Sciences and Technology (BRIEFSAPPLSCIENCES)

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Table of contents (6 chapters)

  1. Front Matter

    Pages i-xv
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  2. Introduction

    • C. S. Nikhil Kumar
    Pages 1-18

  3. Spin-Wave Excitation Patterns Generated by Spin-Torque Nano-Oscillators

    • C. S. Nikhil Kumar
    Pages 19-29

  4. Coherent Spin-Wave Oscillations Through External Feedback

    • C. S. Nikhil Kumar
    Pages 31-45

  5. Magnonic Spectra in 2D Antidot Magnonic Crystals with Line Defect

    • C. S. Nikhil Kumar
    Pages 47-60

  6. Sustaining Spin-Wave Oscillations Through Internal Feedback

    • C. S. Nikhil Kumar
    Pages 61-86

  7. Summary and Future Work

    • C. S. Nikhil Kumar
    Pages 87-90

  8. Back Matter

    Pages 91-92
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Keywords

About this book

The phase-locking of multiple spin-torque nano oscillators(STNOs) is considered the primary vehicle to achieve sufficient signal quality for applications. This book highlights the resonator's design and its need for feedback for phase locking of STNOs. STNOs can act as sources of tunable microwaves after being phase-locked together. External feedback from a coplanar waveguide placed above an STNO helps ensures coherent single domain oscillations. STNOs placed within magnonic crystal cavities also demonstrate coherent oscillations. Arrays of such cavities provide a route to scale power levels from such nano-oscillators. The book presents numerical and micromagnetics to validate the design.  

Authors and Affiliations

  • Postdoc at Institute of Spintronics and Quantum Information, Faculty of Physics, Adam Mickiewicz University, Poznan, India

    C. S. Nikhil Kumar

About the author

Dr. Nikhil Kumar C S received his B.Tech in Electronics and Communication Engineering from the IES College of Engineering, University of Calicut, Kerala in 2007 and was awarded his Master of Science by Research in Electrical Engineering, IIT Madras in 2014 with a thesis titled Analytical models for magnonic devices and with his Doctor of Philosophy in Electrical Engineering, IIT Madras in 2020 with a thesis titled Magnonic Devices with Feedback Stabilization. His research interests are in the areas of Magnonic Devices, Spin Torque Devices, Magnon Spintronic Devices.

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