Magnetic phase shift reconstruction for uniformly magnetized nanowires

Azadeh Akhtari-Zavareh; Marc De Graef; Karen L Kavanagh

doi:10.1016/j.ultramic.2016.10.002

Magnetic phase shift reconstruction for uniformly magnetized nanowires

Ultramicroscopy. 2017 Jan:172:10-16. doi: 10.1016/j.ultramic.2016.10.002. Epub 2016 Oct 4.

Authors

Azadeh Akhtari-Zavareh¹, Marc De Graef², Karen L Kavanagh¹

Affiliations

¹ Department of Physics, Simon Fraser University, Burnaby, British Columbia, Canada.
² Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA, USA.

PMID: 27744132
DOI: 10.1016/j.ultramic.2016.10.002

Abstract

A new analytical model is developed for the magnetic phase shift of uniformly magnetized nanowires with ideal cylindrical geometry. The model is applied to experimental data from off-axis electron holography measurements of the phase shift of CoFeB nanowires, and the saturation induction of a selected wire, as well as its radius, aspect ratio, position and orientation, is determined by fitting the model parameters. The saturation induction value of 1.7T of the CoFeB nanowire is found to be similar, to be within the measurement error, to values reported in the literature.

Keywords: Electron holography; Magnetic nanowire; Magnetic phase reconstruction; Phase shift model.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't