Anisotropy and damping of molecules/cobalt hybrid thin films

Olivier Rousseau (1) , Salim Cherif (1) , Yves Roussigne (1) , Mohamed Belmeguenai (1) , Pascal Martin (2) , Jean-Christophe Lacroix (2) , Maria Luisa Della Rocca (3) , Philippe Lafarge (3) , Clement Barraud (3)

1 LSPM - Laboratoire des Sciences des Procédés et des Matériaux
2 ITODYS (UMR_7086) - Interfaces, Traitements, Organisation et Dynamique des Systèmes
3 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques

We have investigated the magnetic properties of evaporated Co thin films covalently functionalized with different organic thin films, namely (1-(2-bisthienyl benzene) and nitro-benzene. The coating is realized thanks to a diazonium-based electro-reduction process. Brillouin light scattering experiments revealed that the magnetic properties are sensitive to the presence of the organic film. For (1-(2-bisthienyl benzene) thin films, the perpendicular magnetic anisotropy is increased as well as the magnetic damping. However for nitrobenzene, only the perpendicular anisotropy is increased albeit less than for (1-(2-bisthienyl benzene). This change in magnetic properties might be attributed to the coupling with the organic molecules.

Mots clés: Anisotropy; Damping; Organic molecules; Cobalt thin films; Brillouin light scattering

Domaines: Chimie organique

Olivier Rousseau, Salim Cherif, Yves Roussigne, Mohamed Belmeguenai, Pascal Martin, et al.. Anisotropy and damping of molecules/cobalt hybrid thin films. IEEE Transactions on Magnetics, 2017, pp.1 - 1. ⟨10.1109/TMAG.2017.2694888⟩. ⟨hal-01549026⟩