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

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

3047

Lastpage

3049

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908674

Filename

908674