Please use this identifier to cite or link to this item:
|Title:||Change of cobalt magnetic anisotropy and spin polarization with alkanethiolates self-assembled monolayers|
scanning tunneling microscopy
|Publisher:||IOP Publishing Ltd|
|Citation:||New Journal of Physics|
Campiglio, P.; Breitwieser, R.; Repain, V.; Guitteny, S.; Chacon, C.; Bellec, A.; Lagoute, J.; Girard, Y.; Rousset, S.; Sassella, A.; Imam, M.; Narasimhan, S., Change of cobalt magnetic anisotropy and spin polarization with alkanethiolates self-assembled monolayers. New Journal of Physics 2015, 17, 10.
|Abstract:||We demonstrate that the deposition of a self-assembled monolayer of alkanethiolates on a 1 nm thick cobalt ultrathin film grown on Au(111) induces a spin reorientation transition from in-plane to out-of-plane magnetization. Using ab initio calculations, we show that a methanethiolate layer changes slightly both the magnetocrystalline and shape anisotropy, both effects almost cancelling each other out for a 1 nm Co film. Finally, the change in hysteresis cycles upon alkanethiolate adsorption could be assigned to a molecular-induced roughening of the Co layer, as shown by STM. In addition, we calculate how a methanethiolate layer modifies the spin density of states of the Co layer and we show that the spin polarization at the Fermi level through the organic layer is reversed as compared to the uncovered Co. These results give new theoretical and experimental insights for the use of thiol-based self-assembled monolayers in spintronic devices.|
|Appears in Collections:||Research Articles (Shobhana Narasimhan)|
Files in This Item:
|1.39 MB||Adobe PDF||View/Open Request a copy|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.