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A Study Of Periodic And Aperiodic Ferromagnetic Antidot Lattices, Vinayak S. Bhat
A Study Of Periodic And Aperiodic Ferromagnetic Antidot Lattices, Vinayak S. Bhat
Theses and Dissertations--Physics and Astronomy
This thesis reports our study of the effect of domain wall pinning by ferromagnetic (FM) metamaterials [1] in the form of periodic antidot lattices (ADL) on spin wave spectra in the reversible regime. This study was then extended to artificial quasicrystals in the form of Penrose P2 tilings (P2T). Our DC magnetization study of these metamaterials showed reproducible and temperature dependent knee anomalies in the hysteretic regime that are due to the isolated switching of the FM segments. Our dumbbell model analysis [2] of simulated magnetization maps indicates that FM switching in P2T is nonstochastic. We have also acquired …