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Growth and Magnetism of Natural Multilayers
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
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2011 (English)In: Journal of Nano Research, ISSN 1662-5250, Vol. 15, 95-103 p.Article in journal (Refereed) Published
Abstract [en]

In this work, we present a simple method to fabricate high quality Ni/NiO multilayers with the use of a single magnetron sputtering head. Namely, at the end of the deposition of each single Ni layer, air is let to flow into the vacuum chamber through a leak valve. Then, a very thin NiO layer (similar to 1nm) is formed by natural oxidation. The process is reproducible and the result is the formation of a multilayer with excellent layering. Magnetization hysteresis loops recorded at 5 K and room temperature reveal a tendency for perpendicular magnetic anisotropy as the thickness of the individual Ni layers decreases. It is shown that the Ni/NiO interface has sizeable positive surface/interface anisotropy, i.e. it favors the development of perpendicular magnetic anisotropy. This is rather unusual for a Ni-based multilayered system and may render Ni/NiO multilayers useful for magneto-optical recording applications.

Place, publisher, year, edition, pages
2011. Vol. 15, 95-103 p.
Keyword [en]
Ni, NiO, multilayers, growth, spintronics, magnetization, anisotropy, photovoltaics
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-161304DOI: 10.4028/www.scientific.net/JNanoR.15.95ISI: 000295909100010OAI: oai:DiVA.org:uu-161304DiVA: diva2:455727
Available from: 2011-11-11 Created: 2011-11-10 Last updated: 2017-02-01Bibliographically approved

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Kapaklis, VassiliosJönsson, Petra E.Papaioannou, Evangelos Th.

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