Nanowires of Fe/multi-walled carbon nanotubes and nanometric thin films of Fe/MgO

Journal Article · Tue Apr 14 04:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4917051· OSTI ID:22402842

Newman, Alexander; Khatiwada, Suman; Neupane, Suman; Seifu, Dereje ^[1]

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1. Department of Physics, Morgan State University, Baltimore, Maryland 21251 (United States)

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.

• OSTI ID: 22402842
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 14 Vol. 117; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
CARBON NANOTUBES
COMPARATIVE EVALUATIONS
DEPOSITION
IRON
MAGNESIUM OXIDES
MAGNETIC FIELDS
MAGNETIC PROPERTIES
NANOWIRES
SUBSTRATES
TEMPERATURE DEPENDENCE
THIN FILMS
TWO-DIMENSIONAL SYSTEMS
X-RAY DIFFRACTION