AVS 56th International Symposium & Exhibition
    Magnetic Interfaces and Nanostructures Thursday Sessions
       Session MI+TF-ThA

Paper MI+TF-ThA9
Experimental Evidence for an Angular Dependent Transition of Magnetization Modes in Magnetic Nanotubes

Thursday, November 12, 2009, 4:40 pm, Room C1

Session: Magnetic Thin Films: Multilayers and Nanostructures
Presenter: O. Albrecht, University of Hamburg, Germany
Authors: O. Albrecht, University of Hamburg, Germany
R. Zierold, University of Hamburg, Germany
C. Patzig, Leibniz-Institute of Surface Modification, Germany
S. Allende, FCFM Universidad de Chile
D. Görlitz, University of Hamburg, Germany
B. Rauschenbach, Leibniz-Institute of Surface Modification, Germany
K. Nielsch, University of Hamburg, Germany
Correspondent: Click to Email
Highly anisotropic magnetic nanostructures maybe used to overcome the superparamagnetic limit found in magnetic nanoparticles. A well known approach which yields highly anisotropic structures is the creation of magnetic nanotubes. An established route for the fabrication of tubular structures is the use of porous alumina membranes as templates for subsequent covering with a magnetic layer by atomic layer deposition (ALD).

By using glancing angle deposition (GLAD), we present an new approach for a template synthesis to realize magnetic nanostructures.

The combination of GLAD and ALD techniques has the ability to build more complex magnetic nanostructures such as zigzag structures consisting of segmented tubes with adjustable angle between them.

We investigate the angular dependent magnetization determined by SQUID magnetometry at room temperature for all three directions in space.

The main result is the experimental evidence for theoretically predicted transition between two magnetization reversal modes (Vortex to Transverse).