The Experts below are selected from a list of 21372 Experts worldwide ranked by ideXlab platform
Ruiheng Zhang - One of the best experts on this subject based on the ideXlab platform.
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correlation between dynamic Magnetization Process and dynamic domains of high saturation induction fesibnbcumo nanocrystalline alloy with dual anisotropies
Journal of Alloys and Compounds, 2022Co-Authors: Ruiheng Zhang, Lei Xie, Jianhua Zhang, Yaqiang Dong, Bojun Zhang, Yanxin LiuAbstract:Abstract Improving the high-frequency properties of the relatively high saturation induction alloys is significance for widening the frequency range of the noise suppression of common mode chokes. Herein, transverse magnetic field annealing after having been nano-crystallized (TA) was performed to the as-quenched Fe76Si13B8Nb1.5Cu1Mo0.5 alloy, and the dynamic properties, microstructure, and dynamic domains were in detail studied comparing with those annealed without magnetic field (NA). It was found that TA at 400 °C caused an increase in permeability at 50 kHz by 41% and a decrease in core loss at 0.2 T and 50 kHz by 30%, in comparison with those of NA. TA at 400 °C induced the ratio of field induced anisotropy constant Ku to average random anisotropy constant to be ~ 1.3 and inhomogeneous rotation, leading to the promoted domain refinement with increasing frequency and improved high-frequency properties, compared with that of NA bears only ~5.4 J/m3. Moreover, the role of dual anisotropies on the magnetic domain structures, dynamic Magnetization Process and magnetic performances were obtained and its correlation model based on the experimental results was established. These results could provide a good guide for performance optimization to meet higher frequency requirements of common mode chokes application.
Franz Pfeiffer - One of the best experts on this subject based on the ideXlab platform.
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visualizing the propagation of volume Magnetization in bulk ferromagnetic materials by neutron grating interferometry invited
Journal of Applied Physics, 2010Co-Authors: Christian Grünzweig, Pavel Lejcek, Jaromir Kopecek, Joachim Kohlbrecher, Oliver Bunk, R. Schafer, E. Lehmann, C. David, Franz PfeifferAbstract:In this article we report on a neutron interferometry technique based on diffraction gratings which was used to visualize the geometry-dependent Magnetization Processes in bulk ferromagnetic materials. The contrast origin is based on the refraction of unpolarized neutrons at magnetic domain walls and the obtained image is termed neutron dark-field image (DFI). The Magnetization Process is imaged by measuring the spatially resolved domain wall density distribution of the sample. The sample under investigation was a polycrystalline steel plate where the Magnetization Process was imaged for different sample orientations. The DFI results of the Magnetization Processes were verified on the one hand by complementary neutron small angle scattering (SANS) experiments and on the other hand by finite element method (FEM) simulations. The obtained SANS and FEM results verify the same Magnetization Process behavior as observed in the DFI results.
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visualizing the propagation of volume Magnetization in bulk ferromagnetic materials by neutron grating interferometry invited
Journal of Applied Physics, 2010Co-Authors: Christian Grünzweig, Pavel Lejcek, Jaromir Kopecek, Joachim Kohlbrecher, Oliver Bunk, R. Schafer, E. Lehmann, C. David, Franz PfeifferAbstract:In this article we report on a neutron interferometry technique based on diffraction gratings which was used to visualize the geometry-dependent Magnetization Processes in bulk ferromagnetic materials. The contrast origin is based on the refraction of unpolarized neutrons at magnetic domain walls and the obtained image is termed neutron dark-field image (DFI). The Magnetization Process is imaged by measuring the spatially resolved domain wall density distribution of the sample. The sample under investigation was a polycrystalline steel plate where the Magnetization Process was imaged for different sample orientations. The DFI results of the Magnetization Processes were verified on the one hand by complementary neutron small angle scattering (SANS) experiments and on the other hand by finite element method (FEM) simulations. The obtained SANS and FEM results verify the same Magnetization Process behavior as observed in the DFI results.
R. Schafer - One of the best experts on this subject based on the ideXlab platform.
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visualizing the propagation of volume Magnetization in bulk ferromagnetic materials by neutron grating interferometry invited
Journal of Applied Physics, 2010Co-Authors: Christian Grünzweig, Pavel Lejcek, Jaromir Kopecek, Joachim Kohlbrecher, Oliver Bunk, R. Schafer, E. Lehmann, C. David, Franz PfeifferAbstract:In this article we report on a neutron interferometry technique based on diffraction gratings which was used to visualize the geometry-dependent Magnetization Processes in bulk ferromagnetic materials. The contrast origin is based on the refraction of unpolarized neutrons at magnetic domain walls and the obtained image is termed neutron dark-field image (DFI). The Magnetization Process is imaged by measuring the spatially resolved domain wall density distribution of the sample. The sample under investigation was a polycrystalline steel plate where the Magnetization Process was imaged for different sample orientations. The DFI results of the Magnetization Processes were verified on the one hand by complementary neutron small angle scattering (SANS) experiments and on the other hand by finite element method (FEM) simulations. The obtained SANS and FEM results verify the same Magnetization Process behavior as observed in the DFI results.
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visualizing the propagation of volume Magnetization in bulk ferromagnetic materials by neutron grating interferometry invited
Journal of Applied Physics, 2010Co-Authors: Christian Grünzweig, Pavel Lejcek, Jaromir Kopecek, Joachim Kohlbrecher, Oliver Bunk, R. Schafer, E. Lehmann, C. David, Franz PfeifferAbstract:In this article we report on a neutron interferometry technique based on diffraction gratings which was used to visualize the geometry-dependent Magnetization Processes in bulk ferromagnetic materials. The contrast origin is based on the refraction of unpolarized neutrons at magnetic domain walls and the obtained image is termed neutron dark-field image (DFI). The Magnetization Process is imaged by measuring the spatially resolved domain wall density distribution of the sample. The sample under investigation was a polycrystalline steel plate where the Magnetization Process was imaged for different sample orientations. The DFI results of the Magnetization Processes were verified on the one hand by complementary neutron small angle scattering (SANS) experiments and on the other hand by finite element method (FEM) simulations. The obtained SANS and FEM results verify the same Magnetization Process behavior as observed in the DFI results.
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dynamic Magnetization Process of nanocrystalline tape wound cores with transverse field induced anisotropy
Acta Materialia, 2006Co-Authors: Sybille Flohrer, R. Schafer, J Mccord, Stefan Roth, Ludwig Schultz, Fausto Fiorillo, Wulf Gunther, Giselher HerzerAbstract:The correlation between dynamic magnetic domain formation and dynamic Magnetization loss is studied in nanocrystalline FeCuNbSiB tape wound cores with different strengths of transverse field-induced anisotropy. A significant excess loss component is measured, in particular for high induction levels. The excess loss cannot be explained by homogeneous Magnetization rotation, the ideal Magnetization Process for a transverse field-induced anisotropy. In fact, dynamic domain observation reveals inhomogeneous rotation of Magnetization, wall displacement Processes, and domain nucleation besides homogeneous rotation. Domain refinement is accordingly observed with increasing frequency. The domain width is smallest for cores with weak induced anisotropy, where excess loss is the lowest. In these cores, surface roughness yields residual domains, which persist at field strengths above the inductively measured saturation field.
Yanxin Liu - One of the best experts on this subject based on the ideXlab platform.
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correlation between dynamic Magnetization Process and dynamic domains of high saturation induction fesibnbcumo nanocrystalline alloy with dual anisotropies
Journal of Alloys and Compounds, 2022Co-Authors: Ruiheng Zhang, Lei Xie, Jianhua Zhang, Yaqiang Dong, Bojun Zhang, Yanxin LiuAbstract:Abstract Improving the high-frequency properties of the relatively high saturation induction alloys is significance for widening the frequency range of the noise suppression of common mode chokes. Herein, transverse magnetic field annealing after having been nano-crystallized (TA) was performed to the as-quenched Fe76Si13B8Nb1.5Cu1Mo0.5 alloy, and the dynamic properties, microstructure, and dynamic domains were in detail studied comparing with those annealed without magnetic field (NA). It was found that TA at 400 °C caused an increase in permeability at 50 kHz by 41% and a decrease in core loss at 0.2 T and 50 kHz by 30%, in comparison with those of NA. TA at 400 °C induced the ratio of field induced anisotropy constant Ku to average random anisotropy constant to be ~ 1.3 and inhomogeneous rotation, leading to the promoted domain refinement with increasing frequency and improved high-frequency properties, compared with that of NA bears only ~5.4 J/m3. Moreover, the role of dual anisotropies on the magnetic domain structures, dynamic Magnetization Process and magnetic performances were obtained and its correlation model based on the experimental results was established. These results could provide a good guide for performance optimization to meet higher frequency requirements of common mode chokes application.
Christian Grünzweig - One of the best experts on this subject based on the ideXlab platform.
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visualizing the propagation of volume Magnetization in bulk ferromagnetic materials by neutron grating interferometry invited
Journal of Applied Physics, 2010Co-Authors: Christian Grünzweig, Pavel Lejcek, Jaromir Kopecek, Joachim Kohlbrecher, Oliver Bunk, R. Schafer, E. Lehmann, C. David, Franz PfeifferAbstract:In this article we report on a neutron interferometry technique based on diffraction gratings which was used to visualize the geometry-dependent Magnetization Processes in bulk ferromagnetic materials. The contrast origin is based on the refraction of unpolarized neutrons at magnetic domain walls and the obtained image is termed neutron dark-field image (DFI). The Magnetization Process is imaged by measuring the spatially resolved domain wall density distribution of the sample. The sample under investigation was a polycrystalline steel plate where the Magnetization Process was imaged for different sample orientations. The DFI results of the Magnetization Processes were verified on the one hand by complementary neutron small angle scattering (SANS) experiments and on the other hand by finite element method (FEM) simulations. The obtained SANS and FEM results verify the same Magnetization Process behavior as observed in the DFI results.
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visualizing the propagation of volume Magnetization in bulk ferromagnetic materials by neutron grating interferometry invited
Journal of Applied Physics, 2010Co-Authors: Christian Grünzweig, Pavel Lejcek, Jaromir Kopecek, Joachim Kohlbrecher, Oliver Bunk, R. Schafer, E. Lehmann, C. David, Franz PfeifferAbstract:In this article we report on a neutron interferometry technique based on diffraction gratings which was used to visualize the geometry-dependent Magnetization Processes in bulk ferromagnetic materials. The contrast origin is based on the refraction of unpolarized neutrons at magnetic domain walls and the obtained image is termed neutron dark-field image (DFI). The Magnetization Process is imaged by measuring the spatially resolved domain wall density distribution of the sample. The sample under investigation was a polycrystalline steel plate where the Magnetization Process was imaged for different sample orientations. The DFI results of the Magnetization Processes were verified on the one hand by complementary neutron small angle scattering (SANS) experiments and on the other hand by finite element method (FEM) simulations. The obtained SANS and FEM results verify the same Magnetization Process behavior as observed in the DFI results.