Geometrical control of the magnetization direction in high-aspect ratio PdNi ferromagnetic nano-electrodes

Abstract

I present a detailed study of the magnetic propertie of electron-beam evaporated Pdo.4Nio.6 alloy thin films by means of ferromagnetic resonance measurements on extended films of varying thickness and anisotropic magnetoresistance measurements lithographically patterned high aspect-ratio ferromagnetic electrodes, respectively. The results reveal that the direction of the magnetization with respect to the film plane strongly depends on the electrode lateral dimensions, transitioning from in-plane magnetization for extended films to out of the plane magnetization for electrode width below 2-3 microns, reaching ~58 degrees for electrode widths of about 100nm (nanowires). This behavior arises from a competition between the film demagnetizing vector, which leads to in-plane magnetization for extended films , and an intrinsic uniaxial anisotropy, which overcomes the magnetostatic energy for laterally constrained films, pulling the magnetization off plane.

Notes

This item is only available in print in the UCF Libraries. If this is your thesis or dissertation, you can help us make it available online for use by researchers around the world by downloading and filling out the Internet Distribution Consent Agreement. You may also contact the project coordinator Kerri Bottorff for more information.

Thesis Completion

2008

Semester

Spring

Advisor

del Barco, Enrique

Degree

Bachelor of Science (B.S.)

College

College of Sciences

Degree Program

Physics

Subjects

Dissertations, Academic -- Sciences;Sciences -- Dissertations, Academic

Format

Print

Identifier

DP0022705

Language

English

Access Status

Open Access

Length of Campus-only Access

None

Document Type

Honors in the Major Thesis

This document is currently not available here.

Share

COinS