NDLI: Effect of Transversal Applied Bias Field on the Longitudinal Soft Magnetic Properties of Nanocrystalline Finemet Cores

Content Provider	IEEE Xplore Digital Library
Author	Varga, L.K. Kovacs, G.
Copyright Year	1965
Abstract	In this work, we have investigated the effect of a transversal applied DC magnetic field on the longitudinally measured magnetic properties of nanocrystalline Finemet cores. The core was prepared by stacking up toroidal sheets (Dext = 17.5 mm, Dint = 8.5 mm) cut from 20 mm wide Finemet ribbon of 22 μmm thickness. The resulting height of the toroid was 5 mm. The stack was heat treated in hydrogen at 550°C for 1 h. Quantitative measurements were conducted by using a Helmholtz coil for generating the transversal field along the ring axis so that the magnetization of the toroidal core is forced to turn out of the sheet, transversal to the measuring magnetic field applied along the toroid. Flattening of the quasi-static loop as a function of transversal field is accompanied by a diminution of the remanence and coercive field. The relative permeability could be diminished by more than two orders of magnitude (from 60 000 to 700). Correspondingly, the eddy current frequency limit (where the imaginary part of the permeability is maximal) was shifted from 60 kHz to 1 MHz. Tayloring the hysteresis loop will be discussed in terms of rotational magnetization which dominates over the domain wall displacement mechanism when the magnetization is forced to turn out of the sheet plane.
Sponsorship	IEEE Magnetics Society
Starting Page	1360
Ending Page	1362
Page Count	3
File Size	383840
File Format	PDF
ISSN	00189464
Volume Number	48
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic hysteresis Permeability Magnetic cores Perpendicular magnetic anisotropy Magnetic domains Magnetic resonance imaging tailoring the hysteresis loop Constant permeability magnetization processes nanocrystalline Finemet alloy
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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