Volume 86, Number 6, June 2009
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||26 June 2009|
High-field domain wall propagation velocity in magnetic nanowires
Physics Department, The Hong Kong University of Science and Technology - Clear Water Bay, Hong Kong SAR, China
Corresponding author: firstname.lastname@example.org
Accepted: 29 May 2009
A theory of field-induced domain wall (DW) propagation is developed. The theory not only explains why a DW in a defect-free nanowire must propagate at a finite velocity, but also provides a proper definition of DW propagation velocity. This definition, valid for an arbitrary DW structure, allows one to compute the instantaneous DW velocity in a meaningful way even when the DW is not moving as a rigid body. A new velocity-field formula beyond the Walker breakdown field, which is in excellent agreement with both experiments and numerical simulations, is derived.
PACS: 75.60.Jk – Magnetization reversal mechanisms / 75.75.+a – Magnetic properties of nanostructures / 85.70.Ay – Magnetic device characterization, design, and modeling
© EPLA, 2009
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