Magnetic phase shift reconstruction for uniformly magnetized nanowires

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Uniformly magnetized nanowires are crucial in various magnetic applications.
• Accurate characterization of magnetic properties, such as saturation induction, is essential for device performance.
• Existing models may not fully capture the complex magnetic behavior in specific nanowire geometries.

Purpose of the Study:

• To develop a novel analytical model for the magnetic phase shift in uniformly magnetized cylindrical nanowires.
• To validate the model using experimental data from off-axis electron holography.
• To determine key physical parameters of Cobalt Iron Boron (CoFeB) nanowires.

Main Methods:

• Development of an analytical model for magnetic phase shift in ideal cylindrical nanowires.
• Application of the model to experimental off-axis electron holography data.
• Fitting model parameters to determine nanowire radius, aspect ratio, position, orientation, and saturation induction.

Main Results:

• The analytical model successfully describes the magnetic phase shift in CoFeB nanowires.
• Key physical parameters, including saturation induction, were accurately determined by fitting the model.
• The determined saturation induction of 1.7T for the CoFeB nanowire aligns with literature values within measurement error.

Conclusions:

• The developed analytical model provides a reliable method for characterizing magnetic nanowires.
• The study confirms the utility of off-axis electron holography combined with the new model for precise material property determination.
• The findings contribute to a better understanding of magnetic phenomena in nanostructured materials.