Visualization of magnetic domain structure in FeSi based high permeability steel plates by neutron imaging

I. Dhiman; R. Ziesche; L. Riik; I. Manke; A. Hilger; B. Radhakrishnan; T. Burress; W. Treimer; N. Kardjilov

doi:10.1016/j.matlet.2019.126816

Visualization of magnetic domain structure in FeSi based high permeability steel plates by neutron imaging

I. Dhiman, R. Ziesche, L. Riik, I. Manke, A. Hilger, B. Radhakrishnan, T. Burress, W. Treimer, N. Kardjilov

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Abstract

In the present work, a combined study with polarized neutron imaging (PNI) and neutron-grating interferometry based dark field imaging (DFI) experiments on grain oriented high permeability steel sample with 3% Si and 0.35 mm thickness is reported. With the combination of these two experimental techniques it was possible to obtain the complex picture of magnetic domain distribution and domain walls in the electric steel samples. With the PNI technique, the observed fringe pattern contrast may be correlated with basic magnetic domains. These magnetic domains are oriented anti-parallel with respect to each other and the different magnetic field in each domain may lead to fringe pattern contrast. The magnetic domains are disrupted at the grain boundaries, observed as discontinuities in the fringe pattern contrast. In comparison, with DFI measurements, we visualized scattering contrast from magnetic domain walls. A clear correlation between basic domains (from PNI) and domain walls (using DFI) is observed. In the current study we also demonstrate the potential of combining two differential experimental techniques to visualize and obtain collective information about magnetic domains and domain walls.

Original language	English
Article number	126816
Journal	Materials Letters
Volume	259
DOIs	https://doi.org/10.1016/j.matlet.2019.126816
State	Published - Jan 15 2020

Funding

This research was supported by the U.S. Department of Energy, Office of Science, Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office, Office of Basic Energy Sciences, User Facilities under contract number DE-AC05-00OR22725. This research also used resources of the Oak Ridge Leadership Computing Facility, which is a DOE Office of Science User Facility supported under Contract DE-AC05-00OR22725. We thank Helmholtz-Zentrum Berlin für Materialien und Energie GmbH for the allocation of neutron beamtime. This work was supported by the Federal Ministry of Education and Research (BMBF) Project No 05K10KF1. I. D. R. Z. L. R. and N. K. performed the experiments and helped with the data analysis; T. M. provided the samples, B. R, I. M, A. H. and W. T. discussed the results and contributed in reviewing the manuscript; the manuscript was written by I. D. Manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan). This research was supported by the U.S. Department of Energy , Office of Science, Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office, Office of Basic Energy Sciences, User Facilities under contract number DE-AC05-00OR22725 . This research also used resources of the Oak Ridge Leadership Computing Facility, which is a DOE Office of Science User Facility supported under Contract DE-AC05-00OR22725. We thank Helmholtz-Zentrum Berlin für Materialien und Energie GmbH for the allocation of neutron beamtime. This work was supported by the Federal Ministry of Education and Research ( BMBF ) Project No 05K10KF1 . Manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).

Keywords

Grain boundaries
Magnetic materials
Neutron diffraction and scattering

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10.1016/j.matlet.2019.126816

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title = "Visualization of magnetic domain structure in FeSi based high permeability steel plates by neutron imaging",

abstract = "In the present work, a combined study with polarized neutron imaging (PNI) and neutron-grating interferometry based dark field imaging (DFI) experiments on grain oriented high permeability steel sample with 3% Si and 0.35 mm thickness is reported. With the combination of these two experimental techniques it was possible to obtain the complex picture of magnetic domain distribution and domain walls in the electric steel samples. With the PNI technique, the observed fringe pattern contrast may be correlated with basic magnetic domains. These magnetic domains are oriented anti-parallel with respect to each other and the different magnetic field in each domain may lead to fringe pattern contrast. The magnetic domains are disrupted at the grain boundaries, observed as discontinuities in the fringe pattern contrast. In comparison, with DFI measurements, we visualized scattering contrast from magnetic domain walls. A clear correlation between basic domains (from PNI) and domain walls (using DFI) is observed. In the current study we also demonstrate the potential of combining two differential experimental techniques to visualize and obtain collective information about magnetic domains and domain walls.",

keywords = "Grain boundaries, Magnetic materials, Neutron diffraction and scattering",

author = "I. Dhiman and R. Ziesche and L. Riik and I. Manke and A. Hilger and B. Radhakrishnan and T. Burress and W. Treimer and N. Kardjilov",

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AU - Dhiman, I.

AU - Ziesche, R.

AU - Riik, L.

AU - Manke, I.

AU - Hilger, A.

AU - Radhakrishnan, B.

AU - Burress, T.

AU - Treimer, W.

AU - Kardjilov, N.

PY - 2020/1/15

Y1 - 2020/1/15

N2 - In the present work, a combined study with polarized neutron imaging (PNI) and neutron-grating interferometry based dark field imaging (DFI) experiments on grain oriented high permeability steel sample with 3% Si and 0.35 mm thickness is reported. With the combination of these two experimental techniques it was possible to obtain the complex picture of magnetic domain distribution and domain walls in the electric steel samples. With the PNI technique, the observed fringe pattern contrast may be correlated with basic magnetic domains. These magnetic domains are oriented anti-parallel with respect to each other and the different magnetic field in each domain may lead to fringe pattern contrast. The magnetic domains are disrupted at the grain boundaries, observed as discontinuities in the fringe pattern contrast. In comparison, with DFI measurements, we visualized scattering contrast from magnetic domain walls. A clear correlation between basic domains (from PNI) and domain walls (using DFI) is observed. In the current study we also demonstrate the potential of combining two differential experimental techniques to visualize and obtain collective information about magnetic domains and domain walls.

AB - In the present work, a combined study with polarized neutron imaging (PNI) and neutron-grating interferometry based dark field imaging (DFI) experiments on grain oriented high permeability steel sample with 3% Si and 0.35 mm thickness is reported. With the combination of these two experimental techniques it was possible to obtain the complex picture of magnetic domain distribution and domain walls in the electric steel samples. With the PNI technique, the observed fringe pattern contrast may be correlated with basic magnetic domains. These magnetic domains are oriented anti-parallel with respect to each other and the different magnetic field in each domain may lead to fringe pattern contrast. The magnetic domains are disrupted at the grain boundaries, observed as discontinuities in the fringe pattern contrast. In comparison, with DFI measurements, we visualized scattering contrast from magnetic domain walls. A clear correlation between basic domains (from PNI) and domain walls (using DFI) is observed. In the current study we also demonstrate the potential of combining two differential experimental techniques to visualize and obtain collective information about magnetic domains and domain walls.

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Visualization of magnetic domain structure in FeSi based high permeability steel plates by neutron imaging

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