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Effects of Intrinsic Forces in Toroidal Cores Wound of Soft-Magnetic Ribbons

100%

Butvinová B., Butvin P., Švec P., Chromčíková M., Vlasák G.

issue 5

815-817

Magnetic anisotropy as shown by hysteresis loops of tape-wound toroidal cores has been inspected as to the specific response of the anisotropy to core-internal forces during and after annealing. The loops of toroids are compared to that of strip samples annealed together in various ambience. The core-internal forces were manipulated by means of different core construction, too. The results show that it is the heterogeneity, which produces the most effective forces. Different annealing-induced ribbon shrinkage makes the cores effectively heterogeneous and governs their magnetic response, whereas inherent ribbon heterogeneity affects the core properties, too, and is essential for homogeneous cores.

Accents in Modern High Saturation Nanocrystalline Fe-Rich Alloys

73%

Butvinová B., Butvin P., Maťko I., Janičkovič D., Kuzminski M., Ślawska-Waniewska A., Švec P., Chromčíková M.

Acta Physica Polonica A

2017

vol. 131

issue 4

711-713

Post processing limits for iron-rich Fe-Cu-Si-B-P high-induction rapidly-quenched ribbons have been tested. 530°C/20 min is already too much, formed borides being the essential culprit of magnetic properties deterioration. Unlike standard Si-poor Fe-Nb-Cu-B-Si Finemets, these alloys annealed even in "technical" Ar below the upper limit do not create significant squeezing surfaces.

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2 Acta Physica Polonica A

1 2017

1 2010

2 Butvin P.

2 Butvinová B.

2 Chromčíková M.

2 Švec P.

1 Janičkovič D.

1 Kuzminski M.

1 Maťko I.

1 Vlasák G.

1 Ślawska-Waniewska A.

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Effects of Intrinsic Forces in Toroidal Cores Wound of Soft-Magnetic Ribbons

Accents in Modern High Saturation Nanocrystalline Fe-Rich Alloys