Physics – Condensed Matter – Materials Science
Scientific paper
2011-04-28
Physics
Condensed Matter
Materials Science
10 pages, 1 table, 15 figures
Scientific paper
Ferromagnetic Resonance (FMR) measurements are performed as a function of temperature on Nickel nanowires with different diameters (15 nm, 50 nm, 80 nm and 100 nm) from room temperature down to liquid Helium (4.2 K). The resonance field $H_{res}$ measured as a function of field angle and temperature yields interesting information about the size and temperature variation of various anisotropy effects. With diameter increase from 15 nm to 100 nm we observe a transition at 50 nm in easy axis orientation from perpendicular to parallel to the nanowire array axis. The temperature variation of $H_{res}$ is analyzed and explained theoretically with presence of strong magneto-elastic effects in small (15 nm) and large diameter (100 nm) nanowire arrays.
Ghaddar Ahmad
Gieraltowski J.
Tannous C.
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