Magnetization reversal in Pt/Co(0.5 nm)/Pt nano-platelets patterned by focused ion beam lithography
2010; IOP Publishing; Volume: 21; Issue: 44 Linguagem: Inglês
10.1088/0957-4484/21/44/445302
ISSN1361-6528
AutoresJean‐Paul Adam, J. P. Jamet, J. Ferré, A. Mougin, Stanislas Rohart, Raphaël Weil, Éric Le Bourhis, J. Giérak,
Tópico(s)Advanced Electron Microscopy Techniques and Applications
ResumoArrays of ultrathin Pt/Co(0.5 nm)/Pt nano-platelets with lateral sizes ranging from 30 nm to 1 µm have been patterned by focused ion beam (FIB) lithography under a weak Ga(+) ion fluence. From polar magneto-optical Kerr microscopy it is demonstrated that nano-platelets are ferromagnetic with perpendicular anisotropy down to a size of 50 nm. The irradiation process creates a magnetically soft ring at the nano-platelet periphery in which domain nucleation is initiated at a low field. The magnetization reversal in nano-platelets can be interpreted using a confined droplet model. All of the results prove that ultimate FIB patterning is suitable for preparing discrete magnetic recording media or small magnetic memory elements and nano-devices.
Referência(s)