Initial stages of growth of iron on silicon for spin injection through Schottky barrier
Journal article, 2011
The characterization of ferromagnet-semiconductor interfaces with monolayer (ML) depth resolution is an important issue in the development of spin injection devices. In this article, highly resolved depth distributions of Fe have been measured during the initial stages of growth of Fe on Si (100) at room temperature by in situ high-resolution Rutherford backscattering spectrometry. Extensive in-diffusion of Fe has been observed even for the coverage of 0.0325 ML of Fe. At this coverage the Si crystal structure is apparently still conserved. Every second Si layer is depleted of Fe, thus giving rise to compositional oscillations of Fe. At higher coverages strong interdiffusion occurs resulting in the formation of silicides at the interface. Even at 9.2 ML of Fe coverage, no pure Fe layers were observed.
spin
scattering
surface
semiconductor spintronics
si(001)
spintronics
Si
interfaces
si(100)
injection
Fe
high-resolution Rutherford backscattering
resolution rutherford-backscattering
Author
Saroj Prasad Dash
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
H. D. Carstanjen
Max Planck Society
Physica Status Solidi (B): Basic Research
0370-1972 (ISSN) 1521-3951 (eISSN)
Vol. 248 10 2300-2304Subject Categories
Physical Sciences
DOI
10.1002/pssb.201147102