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Initial stages of growth of iron on silicon for spin injection through Schottky barrier

Saroj Prasad Dash (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; H. D. Carstanjen
Physica Status Solidi B - Basic Solid State Physics (0370-1972). Vol. 248 (2011), 10, p. 2300-2304.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Fe, high-resolution Rutherford backscattering, interfaces, Si, spin, injection, spintronics, resolution rutherford-backscattering, semiconductor spintronics, si(100), surface, scattering, si(001)

Denna post skapades 2011-11-16.
CPL Pubid: 148556


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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik



Chalmers infrastruktur