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Exchange coupling in hybrid anisotropy magnetic multilayers quantified by vector magnetometry
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.
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2015 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 117, no 17, 17B526Article in journal (Refereed) Published
Abstract [en]

Hybrid anisotropy thin film heterostructures, where layers with perpendicular and in-plane anisotropy are separated by a thin spacer, are novel materials for zero/low field spin torque oscillators and bit patterned media. Here, we report on magnetization reversal and exchange coupling in a archetypal Co/Pd (perpendicular)-NiFe (in-plane) hybrid anisotropy system studied using vector vibrating sample magnetometry. This technique allows us to quantify the magnetization reversal in each individual magnetic layer, and measure of the interlayer exchange as a function of non-magnetic spacer thickness. At large (>1 nm) spacer thicknesses Ruderman-Kittel-Kasuya-Yosida-like exchange dominates, with orange-peel coupling providing a significant contribution only for sub-nm spacer thickness.

Place, publisher, year, edition, pages
2015. Vol. 117, no 17, 17B526
Keyword [en]
Anisotropy, Exchange coupling, Film preparation, Hybrid materials, Magnetic anisotropy, Magnetization, Magnetization reversal, Magnetometers, Anisotropy-thin films, Bit-patterned media, In-plane anisotropy, Interlayer exchange, Ruderman-Kittel-Kasuya-Yosida, Spin-torque oscillators, Vector magnetometry, Vibrating sample magnetometry
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-166933DOI: 10.1063/1.4917336ISI: 000354984100175ScopusID: 2-s2.0-84927638209OAI: diva2:818524

QC 20150609

Available from: 2015-06-09 Created: 2015-05-21 Last updated: 2015-08-17Bibliographically approved

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Nguyen, T. N. AnhÅkerman, Johan
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Material Physics, MF
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