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- Title
Magnetic Properties in Finemet-Type Soft Magnetic Toroidal Cores Annealed under Radial Stresses.
- Authors
Xue, Zhiyong; Li, Xuesong; Sohrabi, Sajad; Ren, Yu; Wang, Weihua
- Abstract
Applying tensile stresses on straight soft magnetic ribbons before core fabrication is a routine method of inducing magnetic anisotropy, while methods of stress annealing of ribbons after core winding are seldom explored. In this study, we utilize a novel approach to induce magnetic anisotropy by applying radial stresses on tape-wound cores of Fe73.5Si13.5B9Cu3Nb1 (at. %) ribbon during crystallization heat treatment. The results show that while stress annealing does not change the structural characteristics of annealed samples, the magnetic anisotropies induced can increase to values ~3–5 times larger than the sample annealed in the absence of external stress. This increase in magnetic anisotropy energy is associated with ~25–50% decrease of magnetic inductance in the treated cores. These results suggest that the magnetic properties of nanocrystalline soft magnetic alloys can be effectively tuned by applying radial stresses.
- Subjects
RADIAL stresses; MAGNETIC properties; MAGNETIC cores; ANNEALING of metals; MAGNETIC anisotropy; HEAT treatment; MAGNETIC alloys; ADHESIVE tape
- Publication
Metals (2075-4701), 2020, Vol 10, Issue 1, p122
- ISSN
2075-4701
- Publication type
Article
- DOI
10.3390/met10010122