Magnetic force microscopy characterization of heat and current treated Fe40Ni38Mo4B18 amorphous ribbons |
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Authors: | Ignacio Garcí a,Nuria Iturriza,Hans Grande,Juliá n Gonzá lez |
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Affiliation: | a New Materials Department, CIDETEC—Centre for Electrochemical Technologies, P° Miramón, E-20009 Donostia-San Sebastián, Spain b Department of Materials Physics, Faculty of Chemistry, University of the Basque Country, P° Manuel de Lardizabal 3, E-20018 Donostia-San Sebastián, Spain c CIC nanoGUNE Consolider, Paseo Mikeletegi 56, E-20009 Donostia-San Sebastián, Spain d Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain |
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Abstract: | The domain structure of a magnetostrictive Fe40Ni38Mo4B18 amorphous ribbon has been studied using magnetic force microscopy (MFM) at room temperature. First, the evolution of the magnetic domain patterns as a function of the annealing temperature has been investigated. In samples heat treated at 250 and 450 °C for 1 h, a transformation from 90° to 180° domain wall has been clearly observed, while the sample heat treated at 700 °C for 1 h showed a magnetic phase fixed by the crystalline anisotropy. Additionally, the evolution of the magnetic domain structure by applying a DC current was recorded by the MFM technique. For current annealed samples at 1 A for 1, 30 and 60 min, a transformation between different domain patterns has been observed. Finally, in samples treated by the current annealing method under simultaneous stress, an increase of the annealing time gives rise to a different magnetic structure arising from the development of transverse magnetic anisotropy. |
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Keywords: | MFM Amorphous ribbon Domain pattern Current annealing |
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