The study of structural, optical, and magnetic properties of undoped and p-type GaN implanted with Mn+ (10 at.%)

Yoon Shon, Sejoon Lee, H. C. Jeon, C. S. Park, T. W. Kang, J. S. Kim, E. K. Kim, Chong S. Yoon, Yongmin Kim

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

GaMnN and GaMnN:Mg layers were prepared using implantation of 10 at.% Mn ions into undoped GaN and p-type GaN:Mg epilayers, respectively. For PL measurements, the samples clearly showed Mn-related transitions indicating a good activation of Mn ions in the host epilayers. Both samples revealed that two precipitate phases of Ga5.2Mn and Mn3Ga coexist with the main crystalline phase of GaMnN. A clear hysteresis loop indicative of obvious ferromagnetism was observed for both samples, and the transition of ferromagnetism showed two kinds of behaviors; i.e., a rapid transition from GaMnN DMS phase at the lower temperature region (75-100 K) and a released transition from Ga5.2Mn and Mn3Ga phases at the higher temperature region (above 300 K). The transition point related to GaMnN DMS phase for Mg-codoped GaMnN (∼100 K) was observed to be higher than undoped GaMnN (∼75 K). This result is considered as resulting from the increase of ferromagnetic interaction rates due to codoping of Mg acceptors.

Original languageEnglish
Pages (from-to)196-199
Number of pages4
JournalMaterials Science and Engineering: B
Volume146
Issue number1-3
DOIs
StatePublished - 15 May 2008

Keywords

  • DMS
  • MBE
  • Mg-codoping
  • Mn-implanted GaMnN
  • MOCVD

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