Enhancement of spin correlations in ZnTe/MnTe superlattices by Cl doping

L. E. Stumpe, J. J. Rhyne, H. Kaiser, S. Lee, U. Bindley, J. K. Furdyna

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10 Citations (Scopus)

Abstract

The effect of adding Cl impurity on the long-range antiferromagnetic coupling in [ZnTe|MnTe] magnetic semiconductor superlattices has been investigated by neutron diffraction. Superlattices consisting of five atomic planes of ZnTe alternated with ten atomic planes of MnTe[(ZnTe)5|(MnTe)10] have been prepared by molecular-beam epitaxy both with and without Cl added to the MnTe and/or ZnTe layers during deposition. This was motivated by the fact that Cl can form either shallow or deep donor levels in II-VI semiconductors, and that such electronic states can serve to modify magnetic interlayer exchange. Unchlorinated samples showed magnetic correlation lengths of around 225 Å (≈5 bilayers) at low temperatures, and the addition of Cl increased the correlation length at 15 K by nearly a factor of 2 to approximately 450 Å.

Original languageEnglish
Pages (from-to)6460-6462
Number of pages3
JournalJournal of Applied Physics
Volume87
Issue number9 III
DOIs
Publication statusPublished - 2000 May 1
Externally publishedYes
Event44th Annual Conference on Magnetism and Magnetic Materials - San Jose, CA, United States
Duration: 1999 Nov 151999 Nov 18

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Stumpe, L. E., Rhyne, J. J., Kaiser, H., Lee, S., Bindley, U., & Furdyna, J. K. (2000). Enhancement of spin correlations in ZnTe/MnTe superlattices by Cl doping. Journal of Applied Physics, 87(9 III), 6460-6462. https://doi.org/10.1063/1.372738