Enhanced optical mode coherence in exchange coupled soft magnetic multilayers

Ciuciulkaite, Agne (author): Uppsala universitet,Institutionen för fysik och astronomi

Univ S Florida, Dept Phys, Tampa, FL 33620 USA Institutionen för fysik och astronomi (creator_code:org_t)

American Institute of Physics (AIP), 2022
2022
English.
In: Journal of Applied Physics. - : American Institute of Physics (AIP). - 0021-8979 .- 1089-7550. ; 131:21

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

We report on an all-optical investigation of coupled spin excitation modes in a series of magnetic trilayer structures. Using time-resolved magneto-optic Kerr effect (tr-MOKE) magnetometry, we observe multi-mode coherent spin excitations in Ni81Fe19/Ru/Co49Fe49V2 multi layers even though the tr-MOKE optical detection is sensitive only to the Co49Fe49V2 magnetization dynamics. Frequency shifts of the different modes indicate that the coupling between the Ni(81)Fe(19 a)nd Co49Fe49V2 layers varies from anti-ferromagnetic to ferromagnetic to uncoupled as the Ru spacer layer thickness is increased from 8 & Aring; to 200 & Aring;. The lifetime of the high frequency coherent oscillations in the Co49Fe49V2 layer increases by over 200%-300% even in the case of uncoupled Ni81Fe19 and Co49Fe49V2 layers with a 200 & Aring; thick Ru spacer. The results suggest an additional method to decrease the damping of high-moment alloys in layered magnetic nanostructures. Published under an exclusive license by AIP Publishing.

By the author/editor: Liu, H.; Ciuciulkaite, Ag ...; Kapaklis, Vassil ...; Karaiskaj, D.; Arena, D. A.

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.