Structural and magnetic properties of ferromagnetic In1-xMnxAs1-yPy layers

N. D. Parashar, P. T. Chiu, B. W. Wessels*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The structural and magnetic properties of epitaxial In1-xMnxAs1-yPy quaternary layers with Mn content ranging from 0.01 to 0.04 and phosphorous content ranging from 0.11 to 0.21 were studied. X-ray diffraction indicated that the films were two phase consisting of an InMnAsP solid solution and hexagonal MnAs nanoprecipitates. Addition of phosphorus promoted precipitate formation. Films were ferromagnetic showing hysteretic behavior in the field dependence of magnetization at 5 and 298 K. From field-cooled magnetization measurements ferromagnetic transitions were observed at 280 and 325 K. The zero field-cooled magnetization versus temperature measurements showed irreversibility for T<300 K that was attributed to the presence of MnAs nanoprecipitates. The calculated coercivity using the Neel model was 1380 G compared to the experimental value of 380 G at 5 K. The difference was attributed to a strong inter-cluster exchange that stabilizes the ferromagnetic state.

Original languageEnglish (US)
Pages (from-to)1058-1062
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume321
Issue number8
DOIs
StatePublished - Apr 2009

Keywords

  • Epitaxial
  • Ferromagnetic semiconductor
  • InMnAsP

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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