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Spin dynamics in a Curie-switch
KTH, School of Engineering Sciences (SCI), Applied Physics, Nanostructure Physics. National Academy of Sciences of Ukraine, Ukraine.
KTH, School of Engineering Sciences (SCI), Applied Physics, Nanostructure Physics. National Academy of Sciences of Ukraine, Ukraine.
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2015 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 27, no 44, 446003Article in journal (Refereed) PublishedText
Abstract [en]

Ferromagnetic resonance properties of F-1/f/F-2/AF multilayers, where weakly ferromagnetic spacer f is sandwiched between strongly ferromagnetic layers F-1 and F-2, with F-1 being magnetically soft and F-2-magnetically hard due to exchange pinning to antiferromagnetic layer AF, are investigated. Spacer-mediated exchange coupling is shown to strongly affect the resonance fields of both F-1 and F-2 layers. Our theoretical calculations as well as measurements show that the key magnetic parameters of the spacer, which govern the ferromagnetic resonance in F-1/f/F-2/AF, are the magnetic exchange length (Lambda), effective saturation magnetization at T = 0 (m(0)) and effective Curie temperature (T-C(eff)). The values of these key parameters are deduced from the experimental data for multilayers with f = NixCu100-x, for the key ranges in the Ni-concentration (x = 54 divided by 70 at. %) and spacer thickness (d = 3 divided by 6 nm). The results obtained provide a deeper insight into thermally-controlled spin precession and switching in magnetic nanostructures, with potential applications in spin-based oscillators and memory devices.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2015. Vol. 27, no 44, 446003
Keyword [en]
magnetic multilayer, exchange coupling, ferromagnetic resonance, Curie temperature, diluted ferromagnetic alloy, Curie-switch
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-179597DOI: 10.1088/0953-8984/27/44/446003ISI: 000365346400011PubMedID: 26471166ScopusID: 2-s2.0-84946060582OAI: oai:DiVA.org:kth-179597DiVA: diva2:893102
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QC 20160112

Available from: 2016-01-12 Created: 2015-12-17 Last updated: 2016-01-12Bibliographically approved

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Kravets, AnatoliiPolishchuk, DmytroKorenivski, Vladislav
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