Out-of-Plane Anisotropy and Low Magnetic Field Induced Magnetic Domain Reorientation in Al/Metglas 2605S2/Al Trilayer Sensors

E. C. PASSAMANI; C. LARICA; P. S. MOSCON; P. MENDOZA ZÉLIS; F. H. SÁNCHEZ

JOURNAL OF APPLIED PHYSICS

AMER INST PHYSICS

Lugar: Ney York; Año: 2011 vol. 110 p. 439061 - 439067

0021-8979

<!-- @page { margin: 2cm } P { margin-bottom: 0.21cm } --> Local magnetism of Al/Metglas 2605/Al trilayer-like sensors prepared by DC sputtering has been studied at room temperature by both in-field and zero-field Mössbauer spectroscopy for a maximum field of 70 mT. Ferromagnetic domain reorientationfrom out-of-ribbon plane to in-plane, induced by low applied fields (< 60 mT), was measured by monitoring the intensities of lines 2 and 5 in the Mössbauer sextet spectra obtained for different magnitudes of applied magnetic field. Coating the Metglas 2605S2 with Al layers of 20μm thickness induces a stress-field, allowing to distinguish different in-plane magnetic anisotropy distributions along the ribbon length (~ 4 mT) as well along its width (~ 10 mT). Using a phenomenological model for the magnetization dynamics, out-of-plane anisotropies ranging up to 3 kJ/m3 were estimated for the Metglas 2605S2 alloy ribbons. This anisotropy range is similar to that observed for the in-plane case previously reported.The methodology applied in this work can be used to determine native out-of-plane anisotropy distributions for different melt-spun ribbons. It also allows understanding magnetization dynamics associated with the ferromagnetic domains reorientation caused either by induced stress or by applied magnetic field.