Magnetic properties of Fe-Cu-Nb-Si-B nanocrystalline magnetic alloys

Journal Article · Mon Feb 28 23:00:00 EST 1994 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/20.312316· OSTI ID:37226

Garcia del Muro, M; Batlle, X; Zquiak, R; Tejada, J ^[1]; Polak, C; Groessinger, R ^[2]

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1. Univ. de Barcelona (Spain). Dept. de Fisica Fonamental
2. Technische Univ., Vienna (Austria). Inst. fuer Experimental Physik

Several ribbons of composition Fe{sub 73.5}Cu{sub 1}Nb{sub 3}Si{sub 16.5}B{sub 6} and Fe{sub 73.5}Cu{sub 1}Nb{sub 3}Si{sub 13.5}B{sub 9} were prepared by annealing the as-quenched samples between 525 C and 700 C, which induced nucleation of nanocrystallites of Fe bcc-type composition. Mean grain sizes were obtained from X-ray diffraction. Static magnetic properties were measured with both a Magnet Physik Hysteresis-Graph (up to 200 Oe) and a SHE S.Q.U.I.D. Magnetometer (up to 50 kOe). Soft magnetic parameters (coercive field and initial permeability) were very sensitive to grain size. The ZFC magnetization at low field showed a broad peak at a temperature T{sub M}, thus signaling a certain distribution of nanocrystalline sizes, and T{sub M} strongly decreased when the mean grain size decreased. Isothermal magnetization curves at low temperature showed the expected asymptotic behavior of a random magnet material at low and high fields.

• OSTI ID: 37226
• Report Number(s): CONF-930860--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 2Pt2 Vol. 30; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BORON ALLOYS
CHEMICAL COMPOSITION
COPPER ALLOYS
EXPERIMENTAL DATA
GRAIN SIZE
IRON BASE ALLOYS
MAGNETIC PROPERTIES
NIOBIUM ALLOYS
SILICON ALLOYS