Relevant, systematic variation of morphology and magnetism according to annealing in InMnP:Zn

Yoon Shon, S. W. Lee, C. S. Park, Sejoon Lee, H. C. Jeon, D. Y. Kim, T. W. Kang, Chong S. Yoon, E. K. Kim, Jeoung Ju Lee

Research output: Contribution to journalArticlepeer-review

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Abstract

InMnP:Zn epilayers doped with Mn (0.290 at.%) were annealed at 723-873 K for 60 s and 473-573 K for 30 min. Using Auger electron spectroscopy, the changes in concentration profiles of the epilayers correlated to the ferromagnetic origin as a function of the annealing conditions. The epilayers annealed at 723-873 K for 60 s exhibited InMn 3 persisting up to 583 K. For InMnP:Zn epilayers annealed at 523-573 K for 30 min, the concentration depth profiles remained flat so that the stoichiometry was well maintained without precipitates such as InMn 3 and MnP comparable to the as-grown InP:Zn before doping Mn. These samples showed clear ferromagnetic hysteresis loops. Curie temperature was about 150 K. A ferromagnetic hysteresis loop was obtained even at very lower annealing temperature of 473 K.

Original languageEnglish
Pages (from-to)494-498
Number of pages5
JournalApplied Surface Science
Volume254
Issue number2
DOIs
StatePublished - 15 Nov 2007

Keywords

  • Auger electron spectroscopy
  • Hysteresis loop
  • InMnP:Zn epilayer
  • MBE
  • MOCVD
  • Morphology

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