TMR modulation in single nanoislands

Spatially Modulated Tunnel Magnetoresistance on the Nanoscale.
Hirofumi Oka, Kun Tao, Sebastian Wedekind, Guillemin Rodary, Valeri S. Stepanyuk, Dirk Sander, and Jü rgen Kirschner
Phys. Rev. Lett. 107, 187201 (2011)

Maps of the TMR ratio obtained at the indicated voltages(e)–(g) Line profiles, averaged over 6
adjacent lines for an improved signal-to-noise ratio, of the TMR ratio images along the yellow arrows in (b)–(d).