Micromagnetic simulations with periodic boundary conditions: Hard-soft nanocomposites

Wysocki, Aleksander L.; Antropov, Vladimir P.

doi:10.1016/j.jmmm.2016.11.128

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

Journal Article · Thu Dec 01 00:00:00 EST 2016 · Journal of Magnetism and Magnetic Materials

DOI:https://doi.org/10.1016/j.jmmm.2016.11.128· OSTI ID:1349900

Wysocki, Aleksander L. ^[1]; Antropov, Vladimir P. ^[1]

Ames Lab., Ames, IA (United States)

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.

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Research Organization:: Ames Lab., Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-07CH11358; AL-90-510-012

OSTI ID:: 1349900

Alternate ID(s):: OSTI ID: 1416595

Report Number(s):: IS-J-8226; PII: S030488531631678X

Journal Information:: Journal of Magnetism and Magnetic Materials, Vol. 428, Issue C; ISSN 0304-8853

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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