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Magnetic properties of Fe-Cu-Nb-Si-B nanocrystaliine magnetic alloys
García del Muro y Solans, Montserrat; Batlle Gelabert, Xavier; Zquiak, R.; Tejada Palacios, Javier; Polak, C.; Grössinger, R.
Universitat de Barcelona
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.
2010-05-04
Difracció de raigs X
Materials magnètics
Aliatges
Magnetisme
Materials nanoestructurats
X-ray diffraction
Magnetic materials
Alloys
Magnetism
Nanostructured materials
(c) IEEE, 1994
Article
IEEE
         

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