Ultrathin epitaxial cobalt films on graphene for spintronic investigations and applications

作者：Vo Van Chi; Kassir Bodon Zoukaa; Yang Hongxin; Coraux Johann^*; Vogel Jan; Pizzini Stefania; Bayle Guillemaud Pascale; Chshiev Mairbek; Ranno Laurent; Guisset Valerie; David Philippe; Salvador Violaine; Fruchart Olivier

来源：New Journal of Physics, 2010, 12(10): 103040.

DOI：10.1088/1367-2630/12/10/103040

Graphene is an attractive candidate in spintronics for a number of reasons, among which are its electric-field-controlled conductivity, its expected long spin lifetime and its two-dimensional nature. A number of recent proposals call for the development of high-quality ferromagnetic thin films in contact with graphene, whereas only thick polycrystalline or three-dimensional (nanoclusters) morphologies have been demonstrated so far. We report on the growth of flat, epitaxial ultrathin Co films on graphene using pulsed laser deposition. These display perpendicular magnetic anisotropy (PMA) in the thickness range 0.5-1 nm, in agreement with our first-principles calculations. PMA, epitaxy and ultra-small thickness bring new perspectives on graphene-based spintronic devices making use of the zero-field control of an arbitrary magnetization direction, band matching between electrodes and graphene, and interface phenomena such as the Rashba effect and electric field control of magnetism.

• 出版日期2010-10-26
• 单位中国地震局