Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-11-30
Int. J. Mod. Phys. B 23, 2413 (2009)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Invited Review, 25 Pages, 8 Figures
Scientific paper
10.1142/S021797920905290X
In recent years, electrical spin injection and detection has grown into a lively area of research in the field of spintronics. Spin injection into a paramagnetic material is usually achieved by means of a ferromagnetic source, whereas the induced spin accumulation or associated spin currents are detected by means of a second ferromagnet or the reciprocal spin Hall effect, respectively. This article reviews the current status of this subject, describing both recent progress and well-established results. The emphasis is on experimental techniques and accomplishments that brought about important advances in spin phenomena and possible technological applications. These advances include, amongst others, the characterization of spin diffusion and precession in a variety of materials, such as metals, semiconductors and graphene, the determination of the spin polarization of tunneling electrons as a function of the bias voltage, and the implementation of magnetization reversal in nanoscale ferromagnetic particles with pure spin currents.
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