Laser controlled magnetism in hydrogenated fullerene films

Makarova, Tatiana L., 1959- (author): Umeå universitet,Institutionen för fysik

Kvyatkovskii, Oleg E. (author)

Zakharova, Irina B. (author)

Buga, Sergei G. (author)

Voklov, Aleksandr P. (author)

Shelankov, Andrei L., 1946- (author): Umeå universitet,Institutionen för fysik

(creator_code:org_t)

AIP, 2011
2011
English.
In: Journal of Applied Physics. - : AIP. - 0021-8979 .- 1089-7550. ; 109:8, s. 083941-7

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

Abstract Subject headings

Room temperature ferromagnetic-like behavior in fullerene photopolymerized films treated with monatomic hydrogen is reported. The hydrogen treatment controllably varies the paramagnetic spin concentration and laser induced polymerization transforms the paramagnetic phase to a ferromagnetic-like one. Excess laser irradiation destroys magnetic ordering, presumably due to structural changes, which was continuously monitored by Raman spectroscopy. We suggest an interpretation of the data based on first-principles density-functional spin-unrestricted calculations which show that the excess spin from mono-atomic hydrogen is delocalized within the host fullerene and the laser-induced polymerization promotes spin exchange interaction and spin alignment in the polymerized phase.

By the author/editor: Makarova, Tatian ...; Kvyatkovskii, Ol ...; Zakharova, Irina ...; Buga, Sergei G.; Voklov, Aleksand ...; Shelankov, Andre ...

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