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Title: Magnetization dynamics of coupled ferromagnetic disks

The magnetization configuration in two stacked micron-size ferromagnetic disks can assume different equilibrium states depending on the interfacial coupling between the disks. In this paper, I examine the magnetization dynamics in response to an out-of-plane field pulse for different equilibrium states. For antiferromagnetic coupling, the response spectrum generally consists of a lower-frequency part and a higher-frequency part. The former is related to the response of the core region, which has a significant in-plane response coupled to the out-of-plane one; the latter is related to spin waves generated at the edges of the disk. Finally, for a meron structure the response in the two disks to an out-of-plane pulse is also asymmetric.
Authors:
 [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Northwestern Univ., Evanston, IL (United States). Northwestern-Argonne Inst. for Science and Engineering
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 5; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Contributing Orgs:
Northwestern Univ., Evanston, IL (United States)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1356972
Alternate Identifier(s):
OSTI ID: 1209841

Heinonen, Olle. Magnetization dynamics of coupled ferromagnetic disks. United States: N. p., Web. doi:10.1103/PhysRevB.92.054420.
Heinonen, Olle. Magnetization dynamics of coupled ferromagnetic disks. United States. doi:10.1103/PhysRevB.92.054420.
Heinonen, Olle. 2015. "Magnetization dynamics of coupled ferromagnetic disks". United States. doi:10.1103/PhysRevB.92.054420. https://www.osti.gov/servlets/purl/1356972.
@article{osti_1356972,
title = {Magnetization dynamics of coupled ferromagnetic disks},
author = {Heinonen, Olle},
abstractNote = {The magnetization configuration in two stacked micron-size ferromagnetic disks can assume different equilibrium states depending on the interfacial coupling between the disks. In this paper, I examine the magnetization dynamics in response to an out-of-plane field pulse for different equilibrium states. For antiferromagnetic coupling, the response spectrum generally consists of a lower-frequency part and a higher-frequency part. The former is related to the response of the core region, which has a significant in-plane response coupled to the out-of-plane one; the latter is related to spin waves generated at the edges of the disk. Finally, for a meron structure the response in the two disks to an out-of-plane pulse is also asymmetric.},
doi = {10.1103/PhysRevB.92.054420},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 5,
volume = 92,
place = {United States},
year = {2015},
month = {8}
}