Magnetic properties of Fe-Cu-Nb-Si-B nanocrystalline magnetic alloys
- Univ. de Barcelona (Spain). Dept. de Fisica Fonamental
- 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-; ISSN 0018-9464; TRN: 95:009389
- Journal Information:
- IEEE Transactions on Magnetics, Vol. 30, Issue 2Pt2; Conference: EMMA `93: 5th European magnetic materials and applications conference, Kosice (Slovakia), 24-27 Aug 1993; Other Information: PBD: Mar 1994
- Country of Publication:
- United States
- Language:
- English
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