Title :
Magnetic properties of Fe-Cu-Nb-Si-B nanocrystaliine magnetic alloys
Author :
del Muro, M. Garcia ; Batlle, X. ; Zquiak, R. ; Tejada, J. ; Polak, C. ; Grössinger, R.
Author_Institution :
Dept. de Fisica Fonamental, Barcelona Univ., Spain
fDate :
3/1/1994 12:00:00 AM
Abstract :
Several ribbons of composition Fe73.5Cu1Nb 3Si16.5B6 and Fe73.5Cu1 Nb3Si13.5B9 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 SQUID 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 TM, thus signalling a certain distribution of nanocrystalline sizes, and TM 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
Keywords :
X-ray diffraction examination of materials; annealing; boron alloys; coercive force; copper alloys; grain size; iron alloys; magnetic permeability; magnetisation; nanostructured materials; niobium alloys; silicon alloys; Fe73.5Cu1Nb3Si13.5B 9; Fe73.5Cu1Nb3Si16.5B 6; X-ray diffraction; coercive field; grain sizes; initial permeability; magnetization; nanocrystalline magnetic alloys; ribbons; Annealing; Grain size; Iron; Magnetic field measurement; Magnetic materials; Magnetic properties; Magnetization; Niobium; Soft magnetic materials; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
