New Approach to Closely Spaced Disordered Cobalt-Graphene Polymer Nanocomposites for Non-Conductive RF Ferromagnetic Films

Helene Takacs (1, 2) , Bernard Viala (1) , V. Herman (1) , J. Alarcon Ramos (1) , J. H. Tortai (2) , Florence Duclairoir (3)

1 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information
2 LTM - Laboratoire des technologies de la microélectronique
3 RICC - Reconnaissance Ionique et Chimie de Coordination

This paper describes the two routes with grafting schemes (covalent or not covalent) for producing non-conductive ferromagnetic films of core double-shell cobalt-graphene-polystyrene nanocomposites. Films present high moment (103 emu/g) and high resistivity (10$^{10}$) $\mu \Omega$ . cm) leading to a constant permeability of 1.9 with a magnetic loss tangent of 10$^{-3}$ at 10 GHz.

Keywords: Thin-Films; Magnetic Nanocomposite; High Frequency; Cobalt

Domains: Physics [physics]

Helene Takacs, Bernard Viala, V. Herman, J. Alarcon Ramos, J. H. Tortai, et al.. New Approach to Closely Spaced Disordered Cobalt-Graphene Polymer Nanocomposites for Non-Conductive RF Ferromagnetic Films. IEEE Transactions on Magnetics, 2015, 51, pp.2802304. ⟨10.1109/tmag.2015.2445824⟩. ⟨cea-01745408⟩