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Title: Micromagnetic simulations with periodic boundary conditions: Hard-soft nanocomposites

Here, we developed a micromagnetic method for modeling magnetic systems with periodic boundary conditions along an arbitrary number of dimensions. The main feature is an adaptation of the Ewald summation technique for evaluation of long-range dipolar interactions. The method was applied to investigate the hysteresis process in hard-soft magnetic nanocomposites with various geometries. The dependence of the results on different micromagnetic parameters was studied. We found that for layered structures with an out-of-plane hard phase easy axis the hysteretic properties are very sensitive to the strength of the interlayer exchange coupling, as long as the spontaneous magnetization for the hard phase is significantly smaller than for the soft phase. The origin of this behavior was discussed. Additionally, we investigated the soft phase size optimizing the energy product of hard-soft nanocomposites.
Authors:
 [1] ;  [1]
  1. Ames Lab., Ames, IA (United States)
Publication Date:
Report Number(s):
IS-J-8226
Journal ID: ISSN 0304-8853; PII: S030488531631678X
Grant/Contract Number:
AC02-07CH11358
Type:
Accepted Manuscript
Journal Name:
Journal of Magnetism and Magnetic Materials
Additional Journal Information:
Journal Volume: 428; Journal Issue: C; Journal ID: ISSN 0304-8853
Publisher:
Elsevier
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1349900
Alternate Identifier(s):
OSTI ID: 1416595

Wysocki, Aleksander L., and Antropov, Vladimir P.. Micromagnetic simulations with periodic boundary conditions: Hard-soft nanocomposites. United States: N. p., Web. doi:10.1016/j.jmmm.2016.11.128.
Wysocki, Aleksander L., & Antropov, Vladimir P.. Micromagnetic simulations with periodic boundary conditions: Hard-soft nanocomposites. United States. doi:10.1016/j.jmmm.2016.11.128.
Wysocki, Aleksander L., and Antropov, Vladimir P.. 2016. "Micromagnetic simulations with periodic boundary conditions: Hard-soft nanocomposites". United States. doi:10.1016/j.jmmm.2016.11.128. https://www.osti.gov/servlets/purl/1349900.
@article{osti_1349900,
title = {Micromagnetic simulations with periodic boundary conditions: Hard-soft nanocomposites},
author = {Wysocki, Aleksander L. and Antropov, Vladimir P.},
abstractNote = {Here, we developed a micromagnetic method for modeling magnetic systems with periodic boundary conditions along an arbitrary number of dimensions. The main feature is an adaptation of the Ewald summation technique for evaluation of long-range dipolar interactions. The method was applied to investigate the hysteresis process in hard-soft magnetic nanocomposites with various geometries. The dependence of the results on different micromagnetic parameters was studied. We found that for layered structures with an out-of-plane hard phase easy axis the hysteretic properties are very sensitive to the strength of the interlayer exchange coupling, as long as the spontaneous magnetization for the hard phase is significantly smaller than for the soft phase. The origin of this behavior was discussed. Additionally, we investigated the soft phase size optimizing the energy product of hard-soft nanocomposites.},
doi = {10.1016/j.jmmm.2016.11.128},
journal = {Journal of Magnetism and Magnetic Materials},
number = C,
volume = 428,
place = {United States},
year = {2016},
month = {12}
}