uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Layering and temperature-dependent magnetization and anisotropy of naturally produced Ni/NiO multilayers
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Show others and affiliations
2012 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 112, no 5, 053918- p.Article in journal (Refereed) Published
Abstract [en]

Ni/NiO multilayers were grown by magnetron sputtering at room temperature, with the aid of the natural oxidation procedure. That is, 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 1.2 nm) is formed. Simulated x-ray reflectivity patterns reveal that layering is excellent for individual Ni-layer thickness larger than 2.5 nm, which is attributed to the intercalation of amorphous NiO between the polycrystalline Ni layers. The magnetization of the films, measured at temperatures 5-300 K, has almost bulk-like value, whereas the films exhibit a trend to perpendicular magnetic anisotropy (PMA) with an unusual significant positive interface anisotropy contribution, which presents a weak temperature dependence. The power-law behavior of the multilayers indicates a non-negligible contribution of higher order anisotropies in the uniaxial anisotropy. Bloch-law fittings for the temperature dependence of the magnetization in the spin-wave regime show that the magnetization in the multilayers decreases faster as a function of temperature than the one of bulk Ni. Finally, when the individual Ni-layer thickness decreases below 2 nm, the multilayer stacking vanishes, resulting in a dramatic decrease of the interface magnetic anisotropy and consequently in a decrease of the perpendicular magnetic anisotropy. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4750026]

Place, publisher, year, edition, pages
2012. Vol. 112, no 5, 053918- p.
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-184659DOI: 10.1063/1.4750026ISI: 000309072200095OAI: oai:DiVA.org:uu-184659DiVA: diva2:567135
Available from: 2012-11-12 Created: 2012-11-12 Last updated: 2013-12-28

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Kapaklis, VassiliosJönsson, Petra E.
By organisation
Materials Physics
In the same journal
Journal of Applied Physics
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 170 hits
ReferencesLink to record
Permanent link

Direct link