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Title: The magnetic particle in a box: Analytic and micromagnetic analysis of probe-localized spin wave modes

Abstract

The dipole field from a probe magnet can be used to localize a discrete spectrum of standing spin wave modes in a continuous ferromagnetic thin film without lithographic modification to the film. Obtaining the resonance field for a localized mode is not trivial due to the effect of the confined and inhomogeneous magnetization precession. We compare the results of micromagnetic and analytic methods to find the resonance field of localized modes in a ferromagnetic thin film, and investigate the accuracy of these methods by comparing with a numerical minimization technique that assumes Bessel function modes with pinned boundary conditions. We find that the micromagnetic technique, while computationally more intensive, reveals that the true magnetization profiles of localized modes are similar to Bessel functions with gradually decaying dynamic magnetization at the mode edges. We also find that an analytic solution, which is simple to implement and computationally much faster than other methods, accurately describes the resonance field of localized modes when exchange fields are negligible, and demonstrating the accessibility of localized mode analysis.

Authors:
; ; ; ; ; ;  [1]
  1. Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)
Publication Date:
OSTI Identifier:
22410125
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANALYTICAL SOLUTION; BESSEL FUNCTIONS; BOUNDARY CONDITIONS; COMPARATIVE EVALUATIONS; DIPOLES; FERROMAGNETIC MATERIALS; FERROMAGNETISM; MAGNETIZATION; MAGNETS; PARTICLES; PRECESSION; PROBES; RESONANCE; SPIN WAVES; STANDING WAVES; THIN FILMS

Citation Formats

Adur, Rohan, E-mail: adur@physics.osu.edu, Du, Chunhui, Manuilov, Sergei A., Wang, Hailong, Yang, Fengyuan, Pelekhov, Denis V., and Hammel, P. Chris. The magnetic particle in a box: Analytic and micromagnetic analysis of probe-localized spin wave modes. United States: N. p., 2015. Web. doi:10.1063/1.4908156.
Adur, Rohan, E-mail: adur@physics.osu.edu, Du, Chunhui, Manuilov, Sergei A., Wang, Hailong, Yang, Fengyuan, Pelekhov, Denis V., & Hammel, P. Chris. The magnetic particle in a box: Analytic and micromagnetic analysis of probe-localized spin wave modes. United States. doi:10.1063/1.4908156.
Adur, Rohan, E-mail: adur@physics.osu.edu, Du, Chunhui, Manuilov, Sergei A., Wang, Hailong, Yang, Fengyuan, Pelekhov, Denis V., and Hammel, P. Chris. Thu . "The magnetic particle in a box: Analytic and micromagnetic analysis of probe-localized spin wave modes". United States. doi:10.1063/1.4908156.
@article{osti_22410125,
title = {The magnetic particle in a box: Analytic and micromagnetic analysis of probe-localized spin wave modes},
author = {Adur, Rohan, E-mail: adur@physics.osu.edu and Du, Chunhui and Manuilov, Sergei A. and Wang, Hailong and Yang, Fengyuan and Pelekhov, Denis V. and Hammel, P. Chris},
abstractNote = {The dipole field from a probe magnet can be used to localize a discrete spectrum of standing spin wave modes in a continuous ferromagnetic thin film without lithographic modification to the film. Obtaining the resonance field for a localized mode is not trivial due to the effect of the confined and inhomogeneous magnetization precession. We compare the results of micromagnetic and analytic methods to find the resonance field of localized modes in a ferromagnetic thin film, and investigate the accuracy of these methods by comparing with a numerical minimization technique that assumes Bessel function modes with pinned boundary conditions. We find that the micromagnetic technique, while computationally more intensive, reveals that the true magnetization profiles of localized modes are similar to Bessel functions with gradually decaying dynamic magnetization at the mode edges. We also find that an analytic solution, which is simple to implement and computationally much faster than other methods, accurately describes the resonance field of localized modes when exchange fields are negligible, and demonstrating the accessibility of localized mode analysis.},
doi = {10.1063/1.4908156},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 117,
place = {United States},
year = {2015},
month = {5}
}