Three-dimensional magnetic flux-closure domain patterns in MnAs thin films on GaAs(001)

R. Engel-Herbert; T. Hesjedal; D. M. Schaadt

doi:10.1063/1.2711421

Three-dimensional magnetic flux-closure domain patterns in MnAs thin films on GaAs(001)

R. Engel-Herbert, T. Hesjedal, D. M. Schaadt

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The magnetic microstructure of single-crystalline MnAs films on GaAs(001) has been investigated. Magnetic force microscopy (MFM) reveals a three-dimensional magnetization pattern that is in disagreement with the simple domain picture observed by surface-sensitive magnetic imaging. Here, we present a consistent micromagnetic picture of MnAs thin films in the ferromagnetic stripe phase, which appears in the course of the phase transition. A number of equilibrium magnetization patterns of the stripes are found that are, in fact, based on flux-closure domain patterns in the basal plane of MnAs. The simulation of a stripe array yields excellent agreement with the measured surface magnetization. The experimentally observed stray field contrast was confirmed by MFM contrast simulations based on these equilibrium magnetization patterns.

Original language	English (US)
Article number	09K103
Journal	Journal of Applied Physics
Volume	101
Issue number	9
DOIs	https://doi.org/10.1063/1.2711421
State	Published - 2007

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1063/1.2711421

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title = "Three-dimensional magnetic flux-closure domain patterns in MnAs thin films on GaAs(001)",

abstract = "The magnetic microstructure of single-crystalline MnAs films on GaAs(001) has been investigated. Magnetic force microscopy (MFM) reveals a three-dimensional magnetization pattern that is in disagreement with the simple domain picture observed by surface-sensitive magnetic imaging. Here, we present a consistent micromagnetic picture of MnAs thin films in the ferromagnetic stripe phase, which appears in the course of the phase transition. A number of equilibrium magnetization patterns of the stripes are found that are, in fact, based on flux-closure domain patterns in the basal plane of MnAs. The simulation of a stripe array yields excellent agreement with the measured surface magnetization. The experimentally observed stray field contrast was confirmed by MFM contrast simulations based on these equilibrium magnetization patterns.",

author = "R. Engel-Herbert and T. Hesjedal and Schaadt, {D. M.}",

note = "Funding Information: The authors want to thank the BMBF of Germany for partial financial support and K. H. Ploog for his continuous and generous support. One of the authors (R.E.H.) acknowledges partial financial support by NSERC of Canada. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

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journal = "Journal of Applied Physics",

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AU - Engel-Herbert, R.

AU - Hesjedal, T.

AU - Schaadt, D. M.

N1 - Funding Information: The authors want to thank the BMBF of Germany for partial financial support and K. H. Ploog for his continuous and generous support. One of the authors (R.E.H.) acknowledges partial financial support by NSERC of Canada. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2007

Y1 - 2007

N2 - The magnetic microstructure of single-crystalline MnAs films on GaAs(001) has been investigated. Magnetic force microscopy (MFM) reveals a three-dimensional magnetization pattern that is in disagreement with the simple domain picture observed by surface-sensitive magnetic imaging. Here, we present a consistent micromagnetic picture of MnAs thin films in the ferromagnetic stripe phase, which appears in the course of the phase transition. A number of equilibrium magnetization patterns of the stripes are found that are, in fact, based on flux-closure domain patterns in the basal plane of MnAs. The simulation of a stripe array yields excellent agreement with the measured surface magnetization. The experimentally observed stray field contrast was confirmed by MFM contrast simulations based on these equilibrium magnetization patterns.

AB - The magnetic microstructure of single-crystalline MnAs films on GaAs(001) has been investigated. Magnetic force microscopy (MFM) reveals a three-dimensional magnetization pattern that is in disagreement with the simple domain picture observed by surface-sensitive magnetic imaging. Here, we present a consistent micromagnetic picture of MnAs thin films in the ferromagnetic stripe phase, which appears in the course of the phase transition. A number of equilibrium magnetization patterns of the stripes are found that are, in fact, based on flux-closure domain patterns in the basal plane of MnAs. The simulation of a stripe array yields excellent agreement with the measured surface magnetization. The experimentally observed stray field contrast was confirmed by MFM contrast simulations based on these equilibrium magnetization patterns.

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Three-dimensional magnetic flux-closure domain patterns in MnAs thin films on GaAs(001)

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