Advanced Materials 15, 1719 (2003)

K.-h. Han, D. Spemann, P. Esquinazi, R. Höhne, V. Riede, T. Butz

Abstract

A proton microbeam produces ferromagnetic spots on a highly oriented graphite surface. The Figure shows the topography and the magnetic force microscopy (MFM) images obtained after irradiating the surface with a beam size of 1 μm × 1 μm and a dose of 0.098 nC μm^–2. The strength of the magnetic signal is only a factor of ∼ 10 smaller than that obtained on Fe particles.