Interlayer exchange coupling in MBE-grown GaMnAs-based multilayer systems

Hakjoon Lee, Sangyeop Lee, Seonghoon Choi, Seul Ki Bac, Sang Hoon Lee, Xiang Li, Xinyu Liu, M. Dobrowolska, Jacek K. Furdyna

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Interlayer exchange coupling (IEC) of GaMnAs-based multilayers has been investigated by varying the structural parameters, such as spacer thickness, carrier doping in the nonmagnetic layers, and repetition number of GaMnAs/GaAs bilayers. The type of IEC in the structure (i.e., either ferromagnetic or antiferromagnetic IEC) was identified from the magnetotransport measurements, which show either anisotropic magnetoresistance or giant magnetoresistance-like behavior. The investigation revealed that the parameters of the ferromagnetic GaMnAs layer (i.e., Mn composition and thickness) are less important than those of the non-magnetic GaAs spacer layer in the structure. In particular, it was found that the presence of carriers in the spacer layer plays a crucial role in determining the type and strength of the IEC in GaMnAs-based multilayer systems.

Original languageEnglish
JournalJournal of Crystal Growth
DOIs
Publication statusAccepted/In press - 2017

Fingerprint

Exchange coupling
Molecular beam epitaxy
interlayers
Multilayers
spacers
Enhanced magnetoresistance
Giant magnetoresistance
Galvanomagnetic effects
repetition
Doping (additives)
Chemical analysis
gallium arsenide

Keywords

  • A1. Characterization
  • A3. Molecular beam epitaxy
  • A3. Superlattices
  • B2. Semiconducting III-V materials

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Interlayer exchange coupling in MBE-grown GaMnAs-based multilayer systems. / Lee, Hakjoon; Lee, Sangyeop; Choi, Seonghoon; Bac, Seul Ki; Lee, Sang Hoon; Li, Xiang; Liu, Xinyu; Dobrowolska, M.; Furdyna, Jacek K.

In: Journal of Crystal Growth, 2017.

Research output: Contribution to journalArticle

Lee, Hakjoon ; Lee, Sangyeop ; Choi, Seonghoon ; Bac, Seul Ki ; Lee, Sang Hoon ; Li, Xiang ; Liu, Xinyu ; Dobrowolska, M. ; Furdyna, Jacek K. / Interlayer exchange coupling in MBE-grown GaMnAs-based multilayer systems. In: Journal of Crystal Growth. 2017.
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AU - Lee, Sangyeop

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AU - Bac, Seul Ki

AU - Lee, Sang Hoon

AU - Li, Xiang

AU - Liu, Xinyu

AU - Dobrowolska, M.

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