Nanoengineered Curie Temperature in Laterally-Patterned Ferromagnetic Semiconductor Heterostructures

K. F. Eid; B. L. Sheu; O. Maksimov; M. B. Stone; P. Schiffer; N. Samarth

doi:10.1063/1.1900938

Nanoengineered Curie Temperature in Laterally-Patterned Ferromagnetic Semiconductor Heterostructures

Materials Science 2009-11-11 v2

Authors: K. F. Eid , B. L. Sheu , O. Maksimov , M. B. Stone , P. Schiffer , N. Samarth

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Abstract

We demonstrate the manipulation of the Curie temperature of buried layers of the ferromagnetic semiconductor (Ga,Mn)As using nanolithography to enhance the effect of annealing. Patterning the GaAs-capped ferromagnetic layers into nanowires exposes free surfaces at the sidewalls of the patterned (Ga,Mn)As layers and thus allows the removal of Mn interstitials using annealing. This leads to an enhanced Curie temperature and reduced resistivity compared to unpatterned samples. For a fixed annealing time, the enhancement of the Curie temperature is larger for narrower nanowires.

Keywords

ferromagnetism semiconductor nanowire growth magnetocaloric effect

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@article{arxiv.cond-mat/0501298,
  title  = {Nanoengineered Curie Temperature in Laterally-Patterned Ferromagnetic Semiconductor Heterostructures},
  author = {K. F. Eid and B. L. Sheu and O. Maksimov and M. B. Stone and P. Schiffer and N. Samarth},
  journal= {arXiv preprint arXiv:cond-mat/0501298},
  year   = {2009}
}

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Submitted to Applied Physics Letters (minor corrections)

Nanoengineered Curie Temperature in Laterally-Patterned Ferromagnetic Semiconductor Heterostructures

Abstract

Keywords

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