Self-assembled iron silicide nanowires were formed by depositing 1 ML of Fe onto Si(110) at 700 °C in ultrahigh vacuum. The nanowires have average dimensions of 5 nm high ×10 nm wide × μm long, as measured with ex situ atomic force microscopy. High-resolution electron microscopy identifies the crystal structure as cubic FeSi 2 with orientation FeSi 2(1̄11)//Si(11̄1), FeSi 2〈110〉// Si〈110〉. Magnetometer measurements show a magnetic moment of 0.3 Bohr magneton per iron atom at 2 K. This magnetic property in metastable cubic FeSi 2 nanowires opens up the possibility for high-density data storage and logic applications.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)