García del Muro y Solans, MontserratBatlle Gelabert, XavierZquiak, R.Tejada Palacios, JavierPolak, C.Grössinger, R.2009-06-152009-06-1519940018-9464https://hdl.handle.net/2445/8646Several 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.3 p.application/pdfeng(c) IEEE, 1994Difracció de raigs XMaterials magnèticsAliatgesMagnetismeMaterials nanoestructuratsX-rays diffractionMagnetic materialsAlloysMagnetismNanostructured materialsinfo:eu-repo/semantics/article82552info:eu-repo/semantics/openAccess