Pregled bibliografske jedinice broj: 256724
Low-field EPR studies of levels near the top of the barrier in Mn12-Ac
Low-field EPR studies of levels near the top of the barrier in Mn12-Ac // Gordon Research Conference on Magnetic Nanostructures
Oxford, Ujedinjeno Kraljevstvo, 2006. (poster, međunarodna recenzija, neobjavljeni rad, znanstveni)
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Naslov
Low-field EPR studies of levels near the top of the barrier in Mn12-Ac
Autori
Žilić, Dijana ; Rakvin, Boris ; Dalal, Naresh.S. ; Harter, Andrew ; Sanakis, Yiannis
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni
Skup
Gordon Research Conference on Magnetic Nanostructures
Mjesto i datum
Oxford, Ujedinjeno Kraljevstvo, 03.09.2006. - 08.09.2006
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
Mn12-Ac; EPR
Sažetak
We show that X-band electron paramagnetic resonance (EPR) measurements using a dual-mode resonance cavity can directly probe the levels near the top of the magnetization reversal barrier in the single-molecule magnet (SMM) Mn12-acetate. The observed transitions are much sharper than those reported in high-field EPR studies. The observed temperature dependence of the line positions points to the presence of a spin-diffusional mode. The correlation time for such fluctuations is of the order of 6 10-8 s at 10 K, and follows an Arrhenius activation energy of 35-40 K. These results open a new avenue for understanding the mechanism of tunneling and spin-lattice relaxations in these SMMs.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
