Core-Core Dynamics in Spin Vortex Pairs
2012 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 109, no 9, 097204- p.Article in journal (Refereed) Published
We investigate nanopillars in which two thin ferromagnetic particles are separated by a nanometer thin nonmagnetic spacer and can be set into stable spin vortex-pair configurations. We find that the previously unexplored limit of strong vortex core-core coupling can dominate the spin dynamics in the system. We observe experimentally and explain analytically and numerically how the 0.2 GHz gyrational resonance modes of the individual vortices are transformed into a 2 GHz collective rotational resonance mode in the configurations where the two cores form a bound pair.
Place, publisher, year, edition, pages
2012. Vol. 109, no 9, 097204- p.
Magnetic Vortex, Motion, Excitations, Reversal, Permalloy, Vortices, Dots
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:kth:diva-27197DOI: 10.1103/PhysRevLett.109.097204ISI: 000308016200009ScopusID: 2-s2.0-84865603452OAI: oai:DiVA.org:kth-27197DiVA: diva2:375741
FunderSwedish Research Council
QC 20101209. Updated from manuscript to article in journal.2012-06-132010-12-092016-05-24Bibliographically approved