Magnetic Domain Walls in Rapidly Solidified Magnetostrictive and Non-Magnetostrictive Submicron Amorphous Wires

Results on the magnetic domain walls in rapidly solidified magnetostrictive and non-magnetostrictive amorphous submicron wires are reported. Employing Lorentz transmission electron microscopy, we have observed the domain walls in such ultra-thin amorphous wires. All the investigated samples display vortex domain walls, irrespective of wire composition or diameter. In non-magnetostrictive wires, the domain walls maintain their structure and symmetry under various magnetic field conditions. In contrast, magnetostrictive wires show an elongation of their domain walls upon magnetic field application. The results are important for future developments in miniaturized magnetic devices.