Title :
Pulsed-current-induced domain wall propagation in Permalloy patterns observed using magnetic force microscope
Author :
Gan, L. ; Chung, S.H. ; Aschenbach, K.H. ; Dreyer, M. ; Gomez, R.D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Maryland Univ., College Park, MD, USA
fDate :
9/1/2000 12:00:00 AM
Abstract :
Pulsed-current controlled wall motion in 20 μm wide×200 μm long×160 nm thick patterned Permalloy strips was studied using magnetic force microscopy. By sequential imaging, the displacement of Bloch walls as far as 200 μm along the strip was observed. The direction of motion was in the same direction as the carrier velocity, which reversed with current polarity. The displacement per pulse was dependent upon the sample thickness and current density, which suggests that the mechanism is a combination of s-d exchange and hydromagnetic domain drag forces
Keywords :
Permalloy; exchange interactions (electron); magnetic domain walls; magnetic force microscopy; magnetic thin films; 160 nm; 20 mum; 200 mum; Bloch walls displacement; MFM; NiFe; Permalloy patterns; hydromagnetic domain drag forces; magnetic force microscopy; pulsed-current-induced domain wall propagation; s-d exchange; sequential imaging; thick patterned Permalloy strips; Current density; Drag; Force control; Magnetic domain walls; Magnetic force microscopy; Magnetic forces; Magnetohydrodynamics; Motion control; Strips; Thickness control;
Journal_Title :
Magnetics, IEEE Transactions on
