Study of magnetic properties and local structures in discontinuous-CoFe-ZnO multilayers

H. S. Hsu, J. C.A. Huang, Lance Horng, C. H. Lee, Y. H. Huang, Y. F. Liao, M. Z. Lin

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this study, we have investigated the magnetic properties and local structures of discontinuous-Co70Fe30(x Å)-ZnO multilayers (MLs). With the variation of Co70Fe30 nominal thickness, the phase transition from diluted magnetic semiconductor (DMS) phase, x = 1 ML, to granular phase, x = 5, and 9 MLs, is indicated from the measurements of magnetization versus temperature behavior and extended X-ray absorption fine structure (EXAFS) on Co or Fe K-edge. The analysis of EXAFS at Zn K-edge shows the reduction of Co coordination numbers with the increasing CoFe thickness. This result demonstrates that the CoFe grain size plays an important role in the formation of DMS and is greatly critical for multilayer growth technique.

Original languageEnglish
Pages (from-to)903-905
Number of pages3
JournalIEEE Transactions on Magnetics
Volume41
Issue number2
DOIs
Publication statusPublished - 2005 Feb 1

Fingerprint

Magnetic properties
Multilayers
fine structure
magnetic properties
X ray absorption
coordination number
x rays
grain size
magnetization
Magnetization
Phase transitions
temperature
Temperature
Diluted magnetic semiconductors

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

Hsu, H. S. ; Huang, J. C.A. ; Horng, Lance ; Lee, C. H. ; Huang, Y. H. ; Liao, Y. F. ; Lin, M. Z. / Study of magnetic properties and local structures in discontinuous-CoFe-ZnO multilayers. In: IEEE Transactions on Magnetics. 2005 ; Vol. 41, No. 2. pp. 903-905.
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Study of magnetic properties and local structures in discontinuous-CoFe-ZnO multilayers. / Hsu, H. S.; Huang, J. C.A.; Horng, Lance; Lee, C. H.; Huang, Y. H.; Liao, Y. F.; Lin, M. Z.

In: IEEE Transactions on Magnetics, Vol. 41, No. 2, 01.02.2005, p. 903-905.

Research output: Contribution to journalArticle

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AB - In this study, we have investigated the magnetic properties and local structures of discontinuous-Co70Fe30(x Å)-ZnO multilayers (MLs). With the variation of Co70Fe30 nominal thickness, the phase transition from diluted magnetic semiconductor (DMS) phase, x = 1 ML, to granular phase, x = 5, and 9 MLs, is indicated from the measurements of magnetization versus temperature behavior and extended X-ray absorption fine structure (EXAFS) on Co or Fe K-edge. The analysis of EXAFS at Zn K-edge shows the reduction of Co coordination numbers with the increasing CoFe thickness. This result demonstrates that the CoFe grain size plays an important role in the formation of DMS and is greatly critical for multilayer growth technique.

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