NDLI: Influence of Annealing Temperature and Atmosphere on Surface Microstructure and Magnetism in FINEMET-Type FeSiNbCuB Ribbons

Content Provider	IEEE Xplore Digital Library
Author	Zivotsky, O. Jiraskova, Y. Hendrych, A. Matejka, V. Klimsa, L. Bursik, J.
Copyright Year	1965
Abstract	Paper is primarily devoted to the surface investigations of the FINEMET-type Fe_73.5Si_13.5Nb₃Cu₁B₉ ribbons. As-quenched (AQ) samples were subsequently annealed at different temperatures from 733 K to 923 K in vacuum and hydrogen in order to follow the influence of both treatment parameters on microstructure and magnetic properties. Two-phase magneto-optical (MO) hysteresis loops observed at AQ ribbons correspond to an amorphous structure composed of clusters of the size in units of nm (calculated from XRD). The annealing temperatures are responsible for the origin of the α-Fe and/or α-Fe(Si) nanocrystals of various size formed at the surface and consequently penetrating into the ribbon volume while the atmospheres influence surface oxidation. An interesting occurrence of the asymmetric reversal of longitudinal magnetization, clearly observed after annealing at 733 K and 743 K, is discussed from the viewpoint of quadratic magneto-optical effects. The loop asymmetry decreases with increasing annealing temperature and disappears at 923 K.
Sponsorship	IEEE Magnetics Society
Starting Page	1367
Ending Page	1370
Page Count	4
File Size	1017011
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	Annealing Magnetic hysteresis Magnetic domains Amorphous magnetic materials Atmosphere Surface treatment Magnetooptic effects x-ray scattering Electron microscopy magnetic domains nanostructured materials quadratic magneto-optical effects soft magnetic materials
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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