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Scaling-Based Analysis and Modelling of Power Losses in Amorphous and Nanocrystalline Alloys

100%
Najgebauer M.
Acta Physica Polonica A
|
2017
|
vol. 131
|
issue 5
1225-1227
EN
The paper presents the scaling-based approach to analysis and modelling of power losses in Fe-based amorphous and nanocrystalline alloys. Production technology and properties of these alloys are briefly presented. For each sample, a family of measured loss curves are collapsed onto a single one using appropriate estimated scaling parameters. An interpretation of the fractional exponent is discussed. The scaling analysis is used in the modelling of power losses for the considered alloys. The results of power loss modelling and obtained errors are presented.
2
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Application of Fractional Scaling in Modelling of Magnetic Power Losses

100%
Najgebauer M.
Acta Physica Polonica A
|
2015
|
vol. 128
|
issue 1
107-110
EN
The paper presents a new approach to the Widom-based scaling procedure, in which additional fractional exponents were introduced into the Maclaurin series. The modified scaling procedure was proposed in order to obtain more universal descriptions in a form of the power law series with fractional exponents. The proposed procedure was examined for the power losses scaling of commercial grain-oriented electrical steel.
3
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Fractional Scaling of Magnetic Coercivity in Electrical Steels

100%
Najgebauer M.
Acta Physica Polonica A
|
2017
|
vol. 131
|
issue 4
633-635
EN
The paper presents an application of the fractional scaling procedure in the analysis of magnetic coercivity. The frequency and excitation dependences of measured coercivity can be expressed in a single curve using properly scaled coercivity and frequency values. The scaling parameters will be presented for three different electrical steels.
4
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Magnetic Properties and Flux Distribution in the LaFeCoSi/FeCoV Hybrid Structure

51%
Gozdur R., Lebioda M., Najgebauer M.
Acta Physica Polonica A
|
2017
|
vol. 131
|
issue 5
1294-1297
EN
The study contains a description of magnetic properties of LaFeCoSi/FeCoV structure. The hybrid structure contains magnetocaloric LaFeCoSi core with high-induction ferromagnetic laminations. The magnetic field inside the magnetic structure is gained by the fringe field from FeCoV laminations. Results of modelling and experimental investigations of modified magnetic properties of LaFeCoSi/FeCoV structure were presented and discussed in the paper.
5
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Scaling of Anhysteretic Curves for LaFeCoSi Alloy near the Transition Point

39%
Gozdur R., Chwastek K., Najgebauer M., Lebioda M., Bernacki Ł., Wodzyński A.
Acta Physica Polonica A
|
2017
|
vol. 131
|
issue 4
801-803
EN
LaFeCoSi alloys have attracted much attention as they exhibit magnetocaloric effect in near room temperature. The paper focuses on the description of anhysteretic curve for LaFeCoSi alloy for temperatures close to transition point. For this purpose the Langevin function is applied. The paper confirms that the Langevin function might be a good starting point for development of analytical models aimed at examination of magnetic properties in La-based magnetocaloric materials.
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