Articolo in rivista, 2017, ENG, 10.1016/j.jmmm.2016.11.100

Magnetic decoupling of ferromagnetic metals through a graphene spacer

I. Grimaldi (a); M. Papagno (a); L. Ferrari (b,c); P.M. Sheverdyaeva (c); S.K. Mahatha (c); D. Pacilé (a,c); C. Carbone (c)

(a) Dipartimento di Fisica, Universitá della Calabria, Arcavacata di Rende (CS), 87036, Italy (b) Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Roma I-00133, Italy (c) Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Trieste, Italy

We study the magnetic coupling between different ferromagnetic metals (FMs) across a graphene (G) layer, and the role of graphene as a thin covalent spacer. Starting with G grown on a FM substrate (Ni or Co), we deposited on top at room temperature several FM metals (Fe, Ni, Co). By measuring the dichroic effect of 3p photoemission lines we detect the magnetization of the substrate and the sign of the exchange coupling in FM overlayer at room temperature. We show that the G layer magnetically decouples the FM metals.

Journal of magnetism and magnetic materials 426 (March), pp. 440–443

Keywords

Ferromagnetic materials; Ferromagnetism; Graphene; Magnetic couplings; Nickel

CNR authors

Sheverdyaeva Polina, Pacil Daniela, Mahatha Sanjoy Kr, Ferrari Luisa, Carbone Carlo

CNR institutes

ISM – Istituto di struttura della materia, ISC – Istituto dei sistemi complessi