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Magnetic properties of arrays of interacting Co nanocrystals |
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| Authors: | M. Spasova U. Wiedwald R. Ramchal M. Farle M. Hilgendorff M. Giersig |
| Affiliation: | a Institut für Halbleiterphysik und Optik, Technische Universität Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, Germany b Hahn-Meitner-Institut, Glienicker Strasse 100, 14109 Berlin, Germany |
| Abstract: | Monodisperse Co FCC nanocrystals with 12 nm diameter were self-assembled into regular quasi-two-dimensional triangular periodic arrays on carbon substrates from a toluene-based colloidal suspension. At 300 K the regular arrays show a collective magnetic behaviour due to dipolar coupling. A remanent magnetization with an easy axis in the film-plane and an uniaxial in-plane anisotropy field of 0.037 T were determined by SQUID magnetometry and angular dependent ferromagnetic resonance. |
| Keywords: | Magnetic nanoparticles Self-assembly Ferromagnetic resonance Anisotropy fields Remanent magnetization |
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