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Multilayered Si/Ni nanosprings and their magnetic properties
Yuping He1, Junxue Fu, Yang Zhang
1Department of Physics and Astronomy and Nanoscale Science and Engineering Center, University of Georgia, Athens, GA 30602, USA.
Small (Weinheim an Der Bergstrasse, Germany)
|February 13, 2007
Summary
Researchers fabricated novel silicon/nickel (Si/Ni) nanosprings using glancing-angle deposition. These magnetic nanostructures exhibit unique anisotropy determined by their helical shape and layered composition.
Area of Science:
- Materials Science
- Nanotechnology
- Physics
Background:
- Fabrication of complex nanostructures is crucial for advanced electronic and magnetic devices.
- Understanding magnetic anisotropy in nanoscale materials is key to their application.
Purpose of the Study:
- To fabricate and characterize a novel two-turn, eight-armed, rectangular Si/Ni heterogeneous nanospring structure.
- To investigate the magnetic anisotropy and structural properties of these nanosprings.
Main Methods:
- Multilayer glancing-angle deposition technique was employed for fabrication.
- Scanning electron microscopy and vibrating sample magnetometry were used for characterization.
Main Results:
- Successfully fabricated Si/Ni nanosprings with alternating amorphous Si and face-centered cubic Ni nanorods.
- Magnetic anisotropy was found to be dependent on the Ni nanorod plane, with distinct in-plane easy and hard axes.
- Nanosprings exhibited a tilt of approximately 7.5 degrees, influencing their magnetic behavior.
Conclusions:
- The structure of Si/Ni nanosprings dictates their magnetic anisotropy.
- Experimental results align with theoretical interpretations based on shape anisotropy energy.
