The tetrairon(III) clusters Fe4(L)2(dpm)6 where Hdpm = dipivaloylmethane and H3L = MeC(CH2OH)3 or PhC(CH2OH)3 were obtained by site-specific replacement of the six methoxide bridges in Fe4(OMe)6(dpm)6. As compared with the parent compd., the new clusters show a much larger anisotropy in the S = 5 ground spin state (D/kB∼-0.6 K vs. -0.3 K) and a higher energy barrier to the reversal of the magnetization.
Tuneable Energy Barriers in Tetrairon(III) Single–molecule Magnets / Cornia, Andrea; FABRETTI COSTANTINO, Antonio; P., Garrisi; Mortalo', Cecilia; D., Bonacchi; R., Sessoli; L., Sorace; A. L., Barra; W., Wernsdorfer. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - STAMPA. - 272-276:(2004), pp. e749-e751. [10.1016/j.jmmm.2003.12.1150]
Tuneable Energy Barriers in Tetrairon(III) Single–molecule Magnets
CORNIA, Andrea;FABRETTI COSTANTINO, Antonio;MORTALO', Cecilia;
2004
Abstract
The tetrairon(III) clusters Fe4(L)2(dpm)6 where Hdpm = dipivaloylmethane and H3L = MeC(CH2OH)3 or PhC(CH2OH)3 were obtained by site-specific replacement of the six methoxide bridges in Fe4(OMe)6(dpm)6. As compared with the parent compd., the new clusters show a much larger anisotropy in the S = 5 ground spin state (D/kB∼-0.6 K vs. -0.3 K) and a higher energy barrier to the reversal of the magnetization.
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