Journal of Superconductivity

, Volume 18, Issue 1, pp 41–46

Mn- and Cr-Doped InN: A Promising Diluted Magnetic Semiconductor Material

  • A. Ney
  • R. Rajaram
  • R. F. C. Farrow
  • J. S. HarrisJr.
  • S. S. P. Parkin
Article

DOI: 10.1007/s10948-005-2148-6

Cite this article as:
Ney, A., Rajaram, R., Farrow, R.F.C. et al. J Supercond (2005) 18: 41. doi:10.1007/s10948-005-2148-6

Abstract

Cr- and Mn-doped InN films were successfully grown by plasma-assisted molecular beam epitaxy on c-plane sapphire substrates. Low temperature GaN buffer layers grown by metal-organic vapor-phase epitaxy were used to accommodate the large lattice mismatch between InN and sapphire. A high n-type carrier concentration of 1.5×1020 cm−3 was measured in InN films with 3% Cr-doping. Films of this type exhibit a well-defined in-plane magnetic hysteresis loop and remanence for temperatures varying from 5 to 300K. The Mn-doped films, however, turned out to exhibit less clear magnetic properties. Thus, ferromagnetism in Cr-doped InN can be concluded from our measurements.

Keywords

dilute magnetic semiconductors indium nitride structural properties magnetic hysteresis 

Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  • A. Ney
    • 1
    • 2
  • R. Rajaram
    • 1
    • 2
  • R. F. C. Farrow
    • 1
  • J. S. HarrisJr.
    • 2
  • S. S. P. Parkin
    • 1
  1. 1.IBM Research Division, Almaden Research CenterSan Jose
  2. 2.Solid State and Photonics Lab, Stanford UniversityStanford

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