Effect of crystallization on magnetic domain structure of thinned amorphous FeSiBCuB ribbons

Conference · Tue Nov 01 04:00:00 EST 1994 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6657706

Zhou, S X; Wang, Y G; Ulvensoeen, J H ^[1]; Hoeier, R ^[2]

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1. Univ. of Trondheim-NTH (Norway)
2. Univ. of Trondheim-NTH (Norway). Dept. of Physics SINTEF-Applied Physics, Trondheim (Norway)

Crystallization and associated magnetic domain structure of Fe[sub 73.5]Cu[sub 1]Nb[sub 3]Si[sub 13.5]B[sub 9] amorphous ribbons have been investigated in in-situ annealing studies by electron transmission microscopy (TEM). Two stages of crystallization, which occurred at 380 C and 650 C, have been observed. The crystals associated with these temperatures are spherical nuclei with diameters less than 5 nm or clusters of ultrafine grains whose diameters are in the range of 15--20 nm respectively. The products formed at both stages are identified as the [alpha]-Fe(Si) phase. The magnetic domain structure of the as-quenched specimen is composed of large and simple domains. There is no evident change in domain structure upon the onset of the first crystallization. However, the second stage of crystallization leads to emergence of magnetic ripple. The origin of magnetic ripple is discussed within the framework of the random anisotropy model. From the analysis, effective uniaxial anisotropy in the nanocrystalline alloy may be considered as local random anisotropy and is therefore likely to be the cause of the magnetic ripple. The estimated mean wavelength, [lambda], of the magnetic ripple is approximately 160 nm.

• OSTI ID: 6657706
• Report Number(s): CONF-940629--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 30:6Pt1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
BORON ALLOYS
COPPER ALLOYS
CRYSTALLIZATION
DATA
DOMAIN STRUCTURE
EXPERIMENTAL DATA
GRAIN SIZE
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC PROPERTIES
MICROSTRUCTURE
NIOBIUM ALLOYS
NUMERICAL DATA
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SILICON ALLOYS
SIZE