Nanowires of Fe/multi-walled carbon nanotubes and nanometric thin films of Fe/MgO
Abstract
We observed that nanowires of Fe grown in the lumens of multi-walled carbon nanotubes required four times higher magnetic field strength to reach saturation compared to planar nanometric thin films of Fe on MgO(100). Nanowires of Fe and nanometric thin films of Fe both exhibited two fold magnetic symmetries. Structural and magnetic properties of 1-dimensional nanowires and 2-dimensional nanometric films were studied by several magnetometery techniques. The θ-2θ x-ray diffraction measurements showed that a (200) peak of Fe appeared on thin film samples deposited at higher substrate temperatures. In these samples prepared at higher temperatures, lower coercive field and highly pronounced two-fold magnetic symmetry were observed. Our results show that maximum magnetocrystalline anisotropy occurred for sample deposited at 100 °C and it decreased at higher deposition temperatures.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 09, 2015
- Source ID
- 10.1063/1.4917051
Entities
People
- Alexander Newman
- Dereje Seifu
- Suman Khatiwada
- Suman Neupane
Organizations
- Morgan State University
- National Science Foundation
- United States Army Research Laboratory