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te Sligte E, Bosch RC, Smeets B, et al. Magnetic nanodots from atomic Fe: can it be done?. Proc Natl Acad Sci U S A. 2002;99:6509-13doi: 10.1073/pnas.072525199.
te Sligte, E., Bosch, R. C., Smeets, B., van der Straten, P., Beijerinck, H. C., & van Leeuwen, K. A. (2002). Magnetic nanodots from atomic Fe: can it be done?. Proceedings of the National Academy of Sciences of the United States of America, 996509-13. https://doi.org/10.1073/pnas.072525199
te Sligte, E, et al. "Magnetic nanodots from atomic Fe: can it be done?." Proceedings of the National Academy of Sciences of the United States of America vol. 99 (2002): 6509-13. doi: https://doi.org/10.1073/pnas.072525199
te Sligte E, Bosch RC, Smeets B, van der Straten P, Beijerinck HC, van Leeuwen KA. Magnetic nanodots from atomic Fe: can it be done?. Proc Natl Acad Sci U S A. 2002 Apr 30;99:6509-13. doi: 10.1073/pnas.072525199. Epub 2002 Mar 26. PMID: 11917133; PMCID: PMC128559.
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Proc Natl Acad Sci U S A. 2002 Apr 30;99:6509-13. doi: 10.1073/pnas.072525199. Epub 2002 Mar 26.

Magnetic nanodots from atomic Fe: can it be done?.

Proceedings of the National Academy of Sciences of the United States of America

E te Sligte, R C M Bosch, B Smeets, P van der Straten, H C W Beijerinck, K A H van Leeuwen

Affiliations

  1. Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands. [email protected]

PMID: 11917133 PMCID: PMC128559 DOI: 10.1073/pnas.072525199

Abstract

Laser focusing of Fe atoms offers the possibility of creating separate magnetic structures on a scale of 10 nm with exact periodicity. This can be done by using the parabolic minima of the potential generated by a standing light wave as focusing lenses. To achieve the desired 10-nm resolution, we need to suppress chromatic and spherical aberrations, as well as prevent structure broadening caused by the divergence of the incoming beam. Chromatic aberrations are suppressed by the development of a supersonic Fe beam source with speed ratio S = 11 +/- 1. This beam has an intensity of 3 x 10(15) atoms sr(-1) s(-1). The spherical aberrations of the standing light wave will be suppressed by aperturing with beam masks containing 100-nm slits at 744-nm intervals. The beam divergence can be reduced by application of laser cooling to reduce the transverse velocity. We have constructed a laser system capable of delivering over 500 mW of laser light at 372 nm, the wavelength of the (5)D(4) --> (5)F(5) atomic transition of (56)Fe we intend to use for laser cooling. Application of polarization spectroscopy to a hollow cathode discharge results in a locking system holding the laser continuously within 2 MHz of the desired frequency.

References

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