EAN: 9783031226649

SPRINGERBRIEFS IN MATERIALS MAGNONIC DEVICES ...

This book briefly looks at numerical modeling and micromagnetic simulation results of magnonic
crystals  which are periodically modulated magnonic devices regarded as the magnetic
counterpart of photonic crystals with spin waves acting as the information carrier. Since the
wavelength of the spin wave is several orders of magnitude shorter than that of electromagnetic
waves of the same frequency  magnonic crystals are promising candidates for miniaturization 
especially in the fields of data storage and processing. The book begins by describing the
dispersion relation of dipolar spin waves in a magnonic curved waveguide  solving Walker's
equation in cylindrical coordinates  and then calculating the dispersion of exchange spin waves
using perturbation theory. It describes simulated nano-contact-driven spin wave excitations in
a magnonic cavity  featuring a design of an antidot magnonic crystal around the nano-contact 
with the frequency of the spin wave mode generated lying within the band gap of the magnonic
crystal. The proposed device behaves as a SWASER-Spin Wave Amplification by the Stimulated
Emission of Radiation. This book will find interest among researchers and practitioners
interested in the modeling  simulation  and design of novel magnonic devices.

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