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Patterning of epitaxial MnAs on GaAs by direct optical writing

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3 Author(s)
Ramsteiner, M. ; Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5–7, 10117 Berlin, Germany ; Zhu, H.J. ; Daweritz, L.

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We demonstrate patterning of ferromagnetic MnAs layers on GaAs substrates by optical writing with a focused laser beam. Depending on the writing conditions, stripes with ridge- and groove-shaped cross sections can be produced without damage of the GaAs substrate. Using in situ control by resistance measurements, conditions for the preparation of completely insulating stripes can be established. The formation of insulating and paramagnetic Mn3O4 during optical writing is verified by Raman scattering. © 2001 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:79 ,  Issue: 15 )