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Title: Ferromagnetic resonance in a topographically modulated permalloy film

Abstract

A major focus within the field of magnonics involves the manipulation and control spin wave modes. This is usually done by patterning continuous soft magnetic films. Here, we report on work in which we use topographic modifications of a continuous magnetic thin film, rather than lithographic patterning techniques, to modify the magnon spectrum. To demonstrate this technique we have performed in-plane, broad-band, ferromagnetic res- onance studies on a 100 nm Permalloy film sputtered unto a colloidal crystal with individual sphere diameters of 200 nm. Effects resulting from the, ideally, six-fold symmetric underlying colloidal crystal were studied as a function of the in plane field angle through experiment and micromagnetic modeling. Experimentally, we find two primary spin wave modes; the ratio of the amplitude of these two modes exhibits a six-fold dependence. Modeling shows that both modes are fundamental modes that are nodeless in the unit cell but reside in different demagnetized regions of the unit cell. Additionally, modeling suggests the presence of new higher order topographically modified spin wave modes. Our results demonstrate that topographic modification of magnetic thin films opens new directions for manipulating spin wave modes.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division; Air Force Research Laboratory (AFRL) - Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1356643
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 91; Journal Issue: 13
Country of Publication:
United States
Language:
English

Citation Formats

Sklenar, J., Tucciarone, P., Lee, R. J., Tice, D., Chang, R. P. H., Lee, S. J., Nevirkovets, I. P., Heinonen, O., and Ketterson, J. B. Ferromagnetic resonance in a topographically modulated permalloy film. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.91.134424.
Sklenar, J., Tucciarone, P., Lee, R. J., Tice, D., Chang, R. P. H., Lee, S. J., Nevirkovets, I. P., Heinonen, O., & Ketterson, J. B. Ferromagnetic resonance in a topographically modulated permalloy film. United States. doi:10.1103/PhysRevB.91.134424.
Sklenar, J., Tucciarone, P., Lee, R. J., Tice, D., Chang, R. P. H., Lee, S. J., Nevirkovets, I. P., Heinonen, O., and Ketterson, J. B. Wed . "Ferromagnetic resonance in a topographically modulated permalloy film". United States. doi:10.1103/PhysRevB.91.134424.
@article{osti_1356643,
title = {Ferromagnetic resonance in a topographically modulated permalloy film},
author = {Sklenar, J. and Tucciarone, P. and Lee, R. J. and Tice, D. and Chang, R. P. H. and Lee, S. J. and Nevirkovets, I. P. and Heinonen, O. and Ketterson, J. B.},
abstractNote = {A major focus within the field of magnonics involves the manipulation and control spin wave modes. This is usually done by patterning continuous soft magnetic films. Here, we report on work in which we use topographic modifications of a continuous magnetic thin film, rather than lithographic patterning techniques, to modify the magnon spectrum. To demonstrate this technique we have performed in-plane, broad-band, ferromagnetic res- onance studies on a 100 nm Permalloy film sputtered unto a colloidal crystal with individual sphere diameters of 200 nm. Effects resulting from the, ideally, six-fold symmetric underlying colloidal crystal were studied as a function of the in plane field angle through experiment and micromagnetic modeling. Experimentally, we find two primary spin wave modes; the ratio of the amplitude of these two modes exhibits a six-fold dependence. Modeling shows that both modes are fundamental modes that are nodeless in the unit cell but reside in different demagnetized regions of the unit cell. Additionally, modeling suggests the presence of new higher order topographically modified spin wave modes. Our results demonstrate that topographic modification of magnetic thin films opens new directions for manipulating spin wave modes.},
doi = {10.1103/PhysRevB.91.134424},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 13,
volume = 91,
place = {United States},
year = {Wed Apr 01 00:00:00 EDT 2015},
month = {Wed Apr 01 00:00:00 EDT 2015}
}