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

Direct link
Natural Nanomorphous Ni/NiO Magnetic Multilayers: Structure and Magnetism of the High-Ar Pressure Series
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.
Show others and affiliations
2014 (English)In: Journal of Nanoscience and Nanotechnology, ISSN 1533-4880, Vol. 14, no 8, 6103-6107 p.Article in journal (Refereed) Published
Abstract [en]

Natural nanomorphous Ni/NiO multilayers have exhibited interesting magnetic properties, such as an unusual positive surface anisotropy and perpendicular magnetic anisotropy. Most attention has been paid to multilayers prepared by radio frequency magnetron sputtering under relatively low (3x10(-3) mbar) Ar pressure. Here we report on the correlation between structural and magnetic properties for a new series of multilayers, prepared under relatively high (3x10(-2) mbar) Ar pressure. The crystalline Ni individual layer thickness ranges between 5-8 nm. The amorphous NiO layer thickness is constant, about 1.1 nm thick. X-ray reflectivity showed that in some of the multilayers the high-order Bragg peaks become broader and diminish quickly. Cross-section transmission electron microscopy reveals that this occurs because the first bilayers are formed in accordance to the growth conditions, while the ones near the top are vanished. Despite the deterioration of the interface quality, all samples show tendency for perpendicular magnetic anisotropy even for large bilayer thickness of about 9 nm. Similar tendency is observed even by a 330 nm thick non-multilayered Ni film grown under the same conditions. This observation reveals the important role of strain and magnetoelastic anisotropy as a source of perpendicular magnetic anisotropy in the Ni/NiO multilayers.

Place, publisher, year, edition, pages
2014. Vol. 14, no 8, 6103-6107 p.
Keyword [en]
Multilayers, Magnetic Anisotropy, Nickel, NiO, Spintronics, Magnetic Recording
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-224977DOI: 10.1166/jnn.2014.8864ISI: 000333579100090OAI: oai:DiVA.org:uu-224977DiVA: diva2:719845
Available from: 2014-05-27 Created: 2014-05-26 Last updated: 2014-05-27Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Kapaklis, VassiliosPapaioannou, Evangelos Th.
By organisation
Materials Physics
In the same journal
Journal of Nanoscience and Nanotechnology
Physical 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: 472 hits
ReferencesLink to record
Permanent link

Direct link