Soft Magnetic Properties of Thin Nanocrystalline Particles Due to the Interplay of Random and Coherent Anisotropies

Anton Bachleitner-Hofmann; Bernhard Bergmair; Thomas Schrefl; Armin Satz; Dieter Suess

doi:10.1109/TMAG.2017.2695580

Soft Magnetic Properties of Thin Nanocrystalline Particles Due to the Interplay of Random and Coherent Anisotropies

Anton Bachleitner-Hofmann
, Bernhard Bergmair
, Thomas Schrefl
, Armin Satz
, Dieter Suess

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

We investigated coercive fields of 200 nm × 1200 nm × 5 nm rectangular nanocrystalline thin films as a function of grain size D using finite-element simulations. To this end, we created granular finite-element models with grain sizes ranging from 5 to 60 nm, and performed micromagnetic hysteresis calculations along the y-axis (easy direction) as well as along the x-axis (hard direction). We then used an extended random anisotropy model to interpret the results and to illustrate the interplay of random anisotropy and shape-induced anisotropy, which is coherent on a much larger scale, in thin films.

Original language	English
Article number	2002806
Number of pages	6
Journal	IEEE Transactions on Magnetics
Volume	53
Issue number	11
DOIs	https://doi.org/10.1109/TMAG.2017.2695580
Publication status	Published - Nov 2017
Externally published	Yes

Funding

ACKNOWLEDGEMENT This work was supported in part by the Austrian Federal Ministry of Science, Research and Economy, in part by the National Foundation for Research, Technology and Development, and in part by the Austrian Science Fund under Grant F4112 SFB ViCoM.

Austrian Fields of Science 2012

103017 Magnetism

Keywords

Magnetics
nanocrystalline materials
soft magnetic materials
thin films
GRAIN-SIZE DEPENDENCE
DOMAINS
COERCIVITY

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10.1109/TMAG.2017.2695580

Cite this

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title = "Soft Magnetic Properties of Thin Nanocrystalline Particles Due to the Interplay of Random and Coherent Anisotropies",

abstract = "We investigated coercive fields of 200 nm × 1200 nm × 5 nm rectangular nanocrystalline thin films as a function of grain size D using finite-element simulations. To this end, we created granular finite-element models with grain sizes ranging from 5 to 60 nm, and performed micromagnetic hysteresis calculations along the y-axis (easy direction) as well as along the x-axis (hard direction). We then used an extended random anisotropy model to interpret the results and to illustrate the interplay of random anisotropy and shape-induced anisotropy, which is coherent on a much larger scale, in thin films.",

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author = "Anton Bachleitner-Hofmann and Bernhard Bergmair and Thomas Schrefl and Armin Satz and Dieter Suess",

note = "Funding Information: ACKNOWLEDGEMENT This work was supported in part by the Austrian Federal Ministry of Science, Research and Economy, in part by the National Foundation for Research, Technology and Development, and in part by the Austrian Science Fund under Grant F4112 SFB ViCoM. Publisher Copyright: {\textcopyright} 2017 IEEE. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",

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doi = "10.1109/TMAG.2017.2695580",

language = "English",

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AU - Bachleitner-Hofmann, Anton

AU - Bergmair, Bernhard

AU - Schrefl, Thomas

AU - Satz, Armin

AU - Suess, Dieter

N1 - Funding Information: ACKNOWLEDGEMENT This work was supported in part by the Austrian Federal Ministry of Science, Research and Economy, in part by the National Foundation for Research, Technology and Development, and in part by the Austrian Science Fund under Grant F4112 SFB ViCoM. Publisher Copyright: © 2017 IEEE. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

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N2 - We investigated coercive fields of 200 nm × 1200 nm × 5 nm rectangular nanocrystalline thin films as a function of grain size D using finite-element simulations. To this end, we created granular finite-element models with grain sizes ranging from 5 to 60 nm, and performed micromagnetic hysteresis calculations along the y-axis (easy direction) as well as along the x-axis (hard direction). We then used an extended random anisotropy model to interpret the results and to illustrate the interplay of random anisotropy and shape-induced anisotropy, which is coherent on a much larger scale, in thin films.

AB - We investigated coercive fields of 200 nm × 1200 nm × 5 nm rectangular nanocrystalline thin films as a function of grain size D using finite-element simulations. To this end, we created granular finite-element models with grain sizes ranging from 5 to 60 nm, and performed micromagnetic hysteresis calculations along the y-axis (easy direction) as well as along the x-axis (hard direction). We then used an extended random anisotropy model to interpret the results and to illustrate the interplay of random anisotropy and shape-induced anisotropy, which is coherent on a much larger scale, in thin films.

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KW - nanocrystalline materials

KW - soft magnetic materials

KW - thin films

KW - GRAIN-SIZE DEPENDENCE

KW - DOMAINS

KW - COERCIVITY

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Soft Magnetic Properties of Thin Nanocrystalline Particles Due to the Interplay of Random and Coherent Anisotropies

Abstract

Funding

Austrian Fields of Science 2012

Keywords

Access to Document

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