Publikation: Anisotropy engineering in Co nanodiscs fabricated using prepatterned silicon pillars
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2006
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Thirion, Christophe
Wernsdorfer, Wolfgang
Vaz, Carlos A. F.
Lewis, P.
Ahmed, Haroon
Bland, J. Anthony C.
Mailly, Dominique
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Nanotechnology. 2006, 17, pp. 1960-1963. Available under: doi: 10.1088/0957-4484/17/8/027
Zusammenfassung
Magnetic nanodiscs are fabricated by depositing cobalt onto 10 30 nm diameter silicon nanopillars, which were prepatterned using gold colloids as etch masks. The magnetic anisotropy energy of individual nanodiscs is studied by measuring the angular dependence of switching fields using the micro-SQUID technique. The Stoner-Wohlfarth model, describing the magnetization reversal by unifom rotation, is used to analyse the data. The switching astroids of pure Co exhibit a cubic magnetocrystalline anisotropy indicating that the Co crystallites are fcc. After controlled oxidation of the nanoparticles, the anisotropy is dominated by a defect-induced uniaxial anisotropy, which means that the anisotropy can be used as a quality gauge.
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THIRION, Christophe, Wolfgang WERNSDORFER, Mathias KLÄUI, Carlos A. F. VAZ, P. LEWIS, Haroon AHMED, J. Anthony C. BLAND, Dominique MAILLY, 2006. Anisotropy engineering in Co nanodiscs fabricated using prepatterned silicon pillars. In: Nanotechnology. 2006, 17, pp. 1960-1963. Available under: doi: 10.1088/0957-4484/17/8/027BibTex
@article{Thirion2006Aniso-9248,
year={2006},
doi={10.1088/0957-4484/17/8/027},
title={Anisotropy engineering in Co nanodiscs fabricated using prepatterned silicon pillars},
volume={17},
journal={Nanotechnology},
pages={1960--1963},
author={Thirion, Christophe and Wernsdorfer, Wolfgang and Kläui, Mathias and Vaz, Carlos A. F. and Lewis, P. and Ahmed, Haroon and Bland, J. Anthony C. and Mailly, Dominique}
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