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Magnetic Properties of Textured CoPd Nanocrystalline Thin Films
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
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2012 (English)In: Journal of Nanoscience and Nanotechnology, ISSN 1533-4880, E-ISSN 1533-4899, Vol. 12, no 8, 6240-6247 p.Article in journal (Refereed) Published
Abstract [en]

CoPd is an important nanomaterial for magnetic and magneto-optic storage of information. In this work, CoPd alloyed thin films are grown via radio frequency magnetron sputtering on silicon, glass and polyimide substrates in a vacuum chamber with base pressure of 5 x 10(-8) mbar. The films are nanocrystalline with grain size between 4 and 80 nm. The magnetic properties of thoroughly textured CoPd alloyed thin films are compared to random polycrystalline ones. Magnetization hysteresis loops recorded under fields up to 12 kOe via a home-made magneto-optic Kerr-effect magnetometer reveal strong tendency for perpendicular magnetic anisotropy for the textured film. This anisotropy leads to the formation of well-defined stripe or labyrinthine ferromagnetic domains with the local spins oriented perpendicular to the film plane. The domain patterns and the hysteresis loops are simulated with micromagnetic calculations. Finally, an induced magnetic moment of 0.44 mu B/atom is measured for Pd via X-ray magnetic circular dichroism and it is separated into spin and orbital magnetic moment contributions.

Place, publisher, year, edition, pages
2012. Vol. 12, no 8, 6240-6247 p.
Keyword [en]
Magnetic Properties, Thin Films, Textured Alloys, Magnetic Anisotropy, Magnetic Domains, Micromagnetics, OOMMF, Induced Magnetic Moment, XMCD, Cobalt, Palladium
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-182549DOI: 10.1166/jnn.2012.6441ISI: 000308379900012OAI: oai:DiVA.org:uu-182549DiVA: diva2:560072
Available from: 2012-10-11 Created: 2012-10-11 Last updated: 2017-12-07Bibliographically approved

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Kapaklis, Vassilios

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