Antiferromagnetic interlayer exchange coupling in ferromagnetic GaMnAs/GaAs:Be multilayers

H. Lee, Sang Hoon Lee, S. Choi, S. Lee, X. Liu, J. K. Furdyna

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The interlayer exchange coupling (IEC) in magnetic multilayers determines the spin orientation of individual magnetic layers comprising the system. The dependence of the resistance on the resulting spin configuration in turn leads to the phenomenon known as giant magnetoresistance (GMR). [1] The GMR effect is of key importance to the area of spintronics, in which the spin degree of freedom is utilized in the operation of electronic devices. The behavior of IEC in metallic ferromagnetic multilayers has been extensively investigated, and the ability to control the IEC by structural parameters to be either ferromagnetic (FM) or antiferromagnetic (AFM) is now well established. In contrast, in multilayers consisting of FM semiconductors such as GaMnAs, the ability to change the IEC from FM to AFM is not well understood. Recently, however, AMF IEC was observed in GaMnAs/GaAs:Be multilayers [1]. These systems, however, show somewhat different behavior from their metallic counterparts. Specifically, the IEC in the GaMnAs/GaAs:Be multilayer system is observed to be long range, typically of over 10 nm, so that not only interactions between nearest neighbor (NN) layers of the multilayer, but also between next-nearest-neighbor (NNN) layers are involved during the magnetization reversal process. [2].

Original languageEnglish
Title of host publication2015 IEEE International Magnetics Conference, INTERMAG 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479973224
DOIs
Publication statusPublished - 2015 Jul 14
Event2015 IEEE International Magnetics Conference, INTERMAG 2015 - Beijing, China
Duration: 2015 May 112015 May 15

Publication series

Name2015 IEEE International Magnetics Conference, INTERMAG 2015

Other

Other2015 IEEE International Magnetics Conference, INTERMAG 2015
CountryChina
CityBeijing
Period15/5/1115/5/15

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ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

Lee, H., Lee, S. H., Choi, S., Lee, S., Liu, X., & Furdyna, J. K. (2015). Antiferromagnetic interlayer exchange coupling in ferromagnetic GaMnAs/GaAs:Be multilayers. In 2015 IEEE International Magnetics Conference, INTERMAG 2015 [7157163] (2015 IEEE International Magnetics Conference, INTERMAG 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/INTMAG.2015.7157163