Induced anisotropy in nanocrystalline FeCuNbSiB

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

OSTI ID:6657673

Emura, M; Severino, A M; Santos, A D; Missell, F P ^[1]

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1. Univ. de Sao Paulo (Brazil). Instituto de Fisica

The kinetics of induced anisotropy K[sub ind] was studied in nanocrystalline Fe[sub 73.5]Cu[sub 1]Nb[sub 3]Si[sub 13.5]B[sub 9], as well as in the amorphous precursor and in amorphous Fe[sub 78]B[sub 13]Si[sub 9]. The nanocrystalline alloy was produced from the precursor by annealing at 813 K for 1 h and possessed an average FeSi grain size of 13 nm, as determined from x-ray diffraction. Annealing in a 0.2 T field at 723--773 K, above [Tc] of the amorphous phase, resulted in low values of K[sub ind]. The data were compared to the micromagnetic theory of Kronmueller to determine activation energy spectra. K[sub ind] for the nanocrystalline alloy is well described by this theory, however, with an activation energy spectrum that is much narrower than for the amorphous alloys. The limiting value of the anisotropy is K[sub [infinity]] [approx] 13 J/m[sub 3] consistent with that expected for the anisotropy in Fe-20at%.Si with the DO[sub 3] structure.

• OSTI ID: 6657673
• 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
DATA
EXPERIMENTAL DATA
HYSTERESIS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIZATION
MICROSTRUCTURE
NICKEL ALLOYS
NUMERICAL DATA
PHYSICAL PROPERTIES
SILICON ALLOYS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE