Magneto-conductance through submicron constriction in ferromagnetic (Ga,Mn)As film

O. Pelya, T. Wosiński, T. Figielski, A. Makosa, A. Morawski, J. Sadowski, W. Dobrowolski, R. Szymczak, J. Wróbel, A. Tóth

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We fabricated a simple magnetoresistive microdevice formed by a narrow constriction of submicron width in the epitaxial film of a ferromagnetic (Ga,Mn)As semiconductor, and investigated magnetic properties of the film and the low-temperature charge-carrier transport through the constriction. We have revealed sharp jumps of a lowered conductance in a non-constricted sample and jumps of an enhanced conductance in the constricted one, which appeared when the sweeping magnetic field crossed the regions of the coercive field of the film. We argue that the both features result from a contribution of a magnetic domain wall to the conductance. While the spin-orbit interaction can be responsible for the negative contribution of a domain wall to the conductance, presumably the suppression of the weak localization effects by a domain wall located in the constriction results in the positive contribution to the conductance.

Original languageEnglish
Pages (from-to)252-255
Number of pages4
JournalJournal of Alloys and Compounds
Volume423
Issue number1-2 SPEC. ISS.
DOIs
Publication statusPublished - Oct 26 2006

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Domain walls
Magnetic domains
Carrier transport
Epitaxial films
Charge carriers
Magnetic properties
Orbits
Semiconductor materials
Magnetic fields
Temperature

Keywords

  • Electronic transport
  • Magnetic measurements
  • Semiconductors

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Pelya, O., Wosiński, T., Figielski, T., Makosa, A., Morawski, A., Sadowski, J., ... Tóth, A. (2006). Magneto-conductance through submicron constriction in ferromagnetic (Ga,Mn)As film. Journal of Alloys and Compounds, 423(1-2 SPEC. ISS.), 252-255. https://doi.org/10.1016/j.jallcom.2005.12.119

Magneto-conductance through submicron constriction in ferromagnetic (Ga,Mn)As film. / Pelya, O.; Wosiński, T.; Figielski, T.; Makosa, A.; Morawski, A.; Sadowski, J.; Dobrowolski, W.; Szymczak, R.; Wróbel, J.; Tóth, A.

In: Journal of Alloys and Compounds, Vol. 423, No. 1-2 SPEC. ISS., 26.10.2006, p. 252-255.

Research output: Contribution to journalArticle

Pelya, O, Wosiński, T, Figielski, T, Makosa, A, Morawski, A, Sadowski, J, Dobrowolski, W, Szymczak, R, Wróbel, J & Tóth, A 2006, 'Magneto-conductance through submicron constriction in ferromagnetic (Ga,Mn)As film', Journal of Alloys and Compounds, vol. 423, no. 1-2 SPEC. ISS., pp. 252-255. https://doi.org/10.1016/j.jallcom.2005.12.119
Pelya O, Wosiński T, Figielski T, Makosa A, Morawski A, Sadowski J et al. Magneto-conductance through submicron constriction in ferromagnetic (Ga,Mn)As film. Journal of Alloys and Compounds. 2006 Oct 26;423(1-2 SPEC. ISS.):252-255. https://doi.org/10.1016/j.jallcom.2005.12.119
Pelya, O. ; Wosiński, T. ; Figielski, T. ; Makosa, A. ; Morawski, A. ; Sadowski, J. ; Dobrowolski, W. ; Szymczak, R. ; Wróbel, J. ; Tóth, A. / Magneto-conductance through submicron constriction in ferromagnetic (Ga,Mn)As film. In: Journal of Alloys and Compounds. 2006 ; Vol. 423, No. 1-2 SPEC. ISS. pp. 252-255.
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