Quantitative detection of electrically injected spin accumulation in GaAs using the magneto-optical Kerr effect

A. V. Kimel; A. Kirilyuk; P. Grabs; F. Lehmann; A. A. Tsvetkov; G. Schmidt; L. W. Molenkamp; Th. Rasing

Quantitative detection of electrically injected spin accumulation in GaAs using the magneto-optical Kerr effect

Mesoscale and Nanoscale Physics 2007-05-23 v1

Authors: A. V. Kimel , A. Kirilyuk , P. Grabs , F. Lehmann , A. A. Tsvetkov , G. Schmidt , L. W. Molenkamp , Th. Rasing

Abstract

Using an ultra sensitive magneto-optical Kerr rotation setup we have observed electrical spin injection from (Zn,Mn)Se into bulk GaAs and quantified the spin injection efficiency. The current induced contribution was carefully separated from possible artifacts and studied as a function of voltage and external magnetic field. Our measurements allow us to estimate the concentration of the electrically injected spins into GaAs to be approximately 0.4 $\times10^{15}$ cm $^{-3}$ at a reverse bias of 0.7 V.

Keywords

spin injection magneto-optical Kerr effect GaAs spin accumulation spintronics semiconductors

Cite

@article{arxiv.cond-mat/0507575,
  title  = {Quantitative detection of electrically injected spin accumulation in GaAs using the magneto-optical Kerr effect},
  author = {A. V. Kimel and A. Kirilyuk and P. Grabs and F. Lehmann and A. A. Tsvetkov and G. Schmidt and L. W. Molenkamp and Th. Rasing},
  journal= {arXiv preprint arXiv:cond-mat/0507575},
  year   = {2007}
}

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Quantitative detection of electrically injected spin accumulation in GaAs using the magneto-optical Kerr effect

Abstract

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