Movement of an individual Bloch wall in a single-crystal picture frame of silicon iron at very low velocities

Hellmiss, G.; Storm, Louise Kamuk

doi:10.1109/tmag.1974.1058289

Cited by 30 publications

(5 citation statements)

References 3 publications

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“…Helmiss and Storm carried out precise experiments concerning the movement of an individual Bloch wall in a single crystal picture frame. In hysteresis loops recorded by means of the magnetooptical Kerr effect, the unstable region was revealed to some extent [30]. Similar results were later obtained by Grosse-Nobis [31].…”

Section: The Harrison Model Versus Other Commonly Used Descriptions O...supporting

confidence: 84%

Modeling the Effect of Compressive Stress on Hysteresis Loop of Grain-Oriented Electrical Steel

2022

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Modeling of hysteresis loops may be useful for the designers of magnetic circuits in electric machines. The present paper focuses on the possibility to apply the Harrison model to describe hysteresis loops of grain-oriented electrical steel subject to compressive stress. The model extension is achieved by introduction of an additional term into the equation that describes irreversible magnetization process. The extension term does not include a product of stress and magnetization, as could be anticipated from Sablik’s theory, applicable, e.g., to the Jiles–Atherton model. The present contribution points out the fundamental differences between the two aforementioned modeling approaches, which are based on different philosophies despite some apparent similarities. The modeling results are in a qualitative agreement with the experimental results obtained from a single sheet tester for a representative commercially available grain-oriented electrical steel grade 0.27 mm thick.

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Section: The Harrison Model Versus Other Commonly Used Descriptions O...supporting

confidence: 84%

Modeling the Effect of Compressive Stress on Hysteresis Loop of Grain-Oriented Electrical Steel

2022

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“…It is worth mentioning that the behaviour found in the present experiments for MT seems to be rather common in other systems. For instance, magnetizationdriven magnetic hysteresis loops also show re-entrant behaviour 11 while no re-entrancy is present in magnetic field-driven loops. Furthermore, recent theoretical approaches and computer simulation studies for athermal plastic deformation 23 provide curves with yield points when the control variable is the strain.…”

Section: Resultsmentioning

confidence: 99%

Hysteresis in a system driven by either generalized force or displacement variables: Martensitic phase transition in single-crystallineCu−Zn−Al

et al. 2007

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We report on experiments aimed at comparing the hysteretic response of a Cu-Zn-Al single crystal undergoing a martensitic transition under strain-driven and stress-driven conditions. Strain-driven experiments were performed using a conventional tensile machine while a special device was designed to perform stress-driven experiments. Significant differences in the hysteresis loops were found. The strain-driven curves show reentrant behavior ͑yield point͒ which is not observed in the stress-driven case. The dissipated energy in the stress-driven curves is larger than in the strain-driven ones. Results from recently proposed models qualitatively agree with experiments.

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“…Future work may also be devoted to the possible physical explanation for the unusual shapes of hysteresis loops of excess loss shown in Fig. 14, especially those for B max =1.5 T. The effect of loop deviation close to the maximum (minimum) might be related to experimental work of Hellmiss and Storm about the movement of an individual Bloch wall in a single-crystal picture frame of silicon iron [23].…”

Section: Analysis Of Resultsmentioning

confidence: 91%

Time domain analysis of excess loss in electrical steel

Koprivica¹,

Rosić

Chwastek

2019

Serb J Electr Eng

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The aim of this paper is to present a comprehensive approach to analyse and interpret power loss in ferromagnetic materials with particular attention devoted to excess power loss. Experimental results obtained with an Epstein frame and toroidal core made of electrical steel are presented in the paper, including quasistatic and dynamic hysteresis loops. According to the time waveforms of the measured magnetic field and magnetic flux density, an instantaneous power loss is calculated for the quasistatic and dynamic case. Moreover, the instantaneous power loss due to eddy current is calculated, as well as the instantaneous excess power loss and excess magnetic field. This excess magnetic field is compared to the excess magnetic field calculated by Bertotti's model. Analysis and discussion of the results obtained is given in the paper.

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Movement of an individual Bloch wall in a single-crystal picture frame of silicon iron at very low velocities

Cited by 30 publications

References 3 publications

Modeling the Effect of Compressive Stress on Hysteresis Loop of Grain-Oriented Electrical Steel

Modeling the Effect of Compressive Stress on Hysteresis Loop of Grain-Oriented Electrical Steel

Hysteresis in a system driven by either generalized force or displacement variables: Martensitic phase transition in single-crystallineCu−Zn−Al

Time domain analysis of excess loss in electrical steel

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