Ferromagnetism of Mn/Ge multilayers grown by molecular beam epitaxy

J. J. Lee, J. E. Medvedeva, J. H. Song, Y. Cui, Arthur J Freeman, J. B. Ketterson

Research output: Contribution to journalArticle

Abstract

We report on novel ferromagnetic Mn/Ge multilayers for spintronics applications investigated both experimentally and theoretically. Two Mn/Ge multilayers are grown on GaAs (001) substrates by molecular beam epitaxy. The period of each multilayer consists of an Mn layer of varying thickness (0.6 and 5 Å) and a 10 Å thick Ge spacer layer. From temperaturedependent magnetization and hysteresis loop measurements, the Mn (0.6 Å)/Ge (10 Å) multilayer showed very weak ferromagnetic ordering, which is persistent up to 260 K, whereas the Mn (5 Å)/Ge (10 Å) multilayer exhibited strong ferromagnetism up to 305 K. The coercive field of the Mn (5 Å)/Ge (10 Å) multilayer was 277 Oe at 200 K. Density functional electronic band structure calculations on a number of Mn/Ge (001) multilayers determined them to be ferromagnetic, and estimates of their critical temperatures are reported.

Original languageEnglish
Pages (from-to)335-338
Number of pages4
JournalJournal of Superconductivity and Novel Magnetism
Volume18
Issue number3
DOIs
Publication statusPublished - 2005

Fingerprint

Ferromagnetism
Molecular beam epitaxy
ferromagnetism
Multilayers
molecular beam epitaxy
spacers
critical temperature
hysteresis
magnetization
estimates
electronics
Magnetoelectronics
Hysteresis loops
Band structure
Magnetization
Substrates

Keywords

  • Ferromagnetism
  • MBE
  • Mn/Ge multilayers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Ferromagnetism of Mn/Ge multilayers grown by molecular beam epitaxy. / Lee, J. J.; Medvedeva, J. E.; Song, J. H.; Cui, Y.; Freeman, Arthur J; Ketterson, J. B.

In: Journal of Superconductivity and Novel Magnetism, Vol. 18, No. 3, 2005, p. 335-338.

Research output: Contribution to journalArticle

Lee, J. J. ; Medvedeva, J. E. ; Song, J. H. ; Cui, Y. ; Freeman, Arthur J ; Ketterson, J. B. / Ferromagnetism of Mn/Ge multilayers grown by molecular beam epitaxy. In: Journal of Superconductivity and Novel Magnetism. 2005 ; Vol. 18, No. 3. pp. 335-338.
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