Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1864469 | Physics Letters A | 2009 | 5 Pages |
Abstract
Thin films of the metal organic molecule bis(4-cyano-2,2,6,6-tetramethyl-3,5-heptanedionato)copper(II) (or Cu(CNdpm)2), (C24H36N2O4Cu, Cu(II)), deposited on ferromagnetic Co(111) at 40 K, exhibit a finite electron spin polarization. The spin polarization magnitude and sign for Cu(CNdpm)2 deposited on Co(111) is coverage dependent, but deviates from the mean field expectations for a simple paramagnet on a ferromagnetic substrate. The spin asymmetry is seen to favor select molecular orbitals, consistent with the predicted single molecule density of states. The overlayer polarization observed indicates a strong influence of the ferromagnetic Co(111) substrate and some extra-molecular magnetic coupling.
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Authors
David S. Wisbey, Ning Wu, Danqin Feng, A.N. Caruso, J. Belot, Ya.B. Losovyj, E. Vescovo, P.A. Dowben,