Tunable spin configuration in [Co/Ni]-NiFe spring magnets
2013 (English)In: Journal of Physics D: Applied Physics, ISSN 0022-3727, E-ISSN 1361-6463, Vol. 46, no 12, 125004- p.Article in journal (Refereed) Published
We investigate a tunable spin configuration in [Co/Ni](4)/Co-NiFe exchange spring magnets. The strong perpendicular magnetic anisotropy of the Co/Ni multilayer, which competes with the in-plane shape anisotropy of the Ni81Fe19 (Py) layer, allows for unique magnetic configurations. By varying the NiFe thickness (t(NiFe)) from 2.6 to 3.0 nm, we show that the magnetization tilt angle can be easily tuned from completely out-of-plane (0 degrees) to in-plane (90 degrees). This transition, which occurs for a small range of t(NiFe), can be estimated from the major loop remanence and one-dimensional micromagnetic calculations. These tunable magnetization tilt spring magnets are highly promising for future applications in spin-transfer torque-based devices.
Place, publisher, year, edition, pages
2013. Vol. 46, no 12, 125004- p.
Torque Oscillator, Layer
IdentifiersURN: urn:nbn:se:kth:diva-105237DOI: 10.1088/0022-3727/46/12/125004ISI: 000315413600005ScopusID: 2-s2.0-84874532794OAI: oai:DiVA.org:kth-105237DiVA: diva2:570486
FunderSwedish Foundation for Strategic Research Swedish Research CouncilKnut and Alice Wallenberg Foundation
QC 201304022012-11-192012-11-192013-10-31Bibliographically approved