Direct observation of domain wall structures in curved permalloy wires containing an antinotch

Sandweg, C.W., Wiese, N., McGrouther, D., Hermsdoerfer, S.J., Schultheiss, H., Leven, B., McVitie, S., Hillebrands, B. and Chapman, J.N. (2008) Direct observation of domain wall structures in curved permalloy wires containing an antinotch. Journal of Applied Physics, 103(9), 093906. (doi: 10.1063/1.2913318)

Abstract

The formation and field response of head-to-head domain walls in curved permalloy wires, fabricated to contain a single antinotch, have been investigated using Lorentz microscopy. High spatial resolution maps of the vector induction distribution in domain walls close to the antinotch have been derived and compared with micromagnetic simulations. In wires of 10 nm thickness the walls are typically of a modified asymmetric transverse wall type. Their response to applied fields tangential to the wire at the antinotch location was studied. The way the wall structure changes depends on whether the field moves the wall away from or further into the notch. Higher fields are needed and much more distorted wall structures are observed in the latter case, indicating that the antinotch acts as an energy barrier for the domain wall

• Item Type: Articles
• Keywords: Ferromagnetic materials, magnetic domain walls, nanowires, permalloy
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: McGrouther, Dr Damien and McVitie, Professor Stephen and Chapman, Professor John
• Authors: Sandweg, C.W., Wiese, N., McGrouther, D., Hermsdoerfer, S.J., Schultheiss, H., Leven, B., McVitie, S., Hillebrands, B., and Chapman, J.N.
• Subjects: Q Science > QC Physics
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Journal of Applied Physics
• Publisher: American Institute of Physics
• ISSN: 0021-8979
• Copyright Holders: Copyright © 2008 American Institute of Physics
• First Published: First published in Journal of Applied Physics 103(9):093906
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher