Structural, optical, and magnetic properties of Ho-implanted GaN thin films

F. Y. Lo, J. Y. Guo, V. Ney, A. Ney, M. Y. Chern, A. Melnikov, S. Pezzagna, D. Reuter, A. D. Wieck, J. Massies

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Ho ions were implanted into highly-resistive molecular-beam-epitaxy grown GaN thin films with a 100kV focused-ion-beam implanter at room temperature (RT). The implantation doses of Ho ions ranges from 1014 to 10 16 cm-2. Without thermal annealing, the structural, optical, and magnetic properties of the Ho-implanted thin films were investigated. Structural properties studied by x-ray diffraction revealed Ho incorporation into GaN matrix without secondary phase. The overall photoluminescence of any implanted sample is weaker than that of the non-implanted one. The spectra show neutral-donor-bound exciton emission and defect-related blue luminescence. Blocked superparamagnetic behavior was identified from Ho-implanted samples at temperatures below RT by measurements with a superconducting quantum interference device. The highest ordering temperature is 100 K.

Original languageEnglish
Article number012097
JournalJournal of Physics: Conference Series
Volume266
Issue number1
DOIs
Publication statusPublished - 2011 Jan 1

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magnetic properties
optical properties
room temperature
thin films
implantation
ions
x ray diffraction
molecular beam epitaxy
ion beams
excitons
luminescence
photoluminescence
interference
dosage
annealing
defects
matrices
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Structural, optical, and magnetic properties of Ho-implanted GaN thin films. / Lo, F. Y.; Guo, J. Y.; Ney, V.; Ney, A.; Chern, M. Y.; Melnikov, A.; Pezzagna, S.; Reuter, D.; Wieck, A. D.; Massies, J.

In: Journal of Physics: Conference Series, Vol. 266, No. 1, 012097, 01.01.2011.

Research output: Contribution to journalArticle

Lo, FY, Guo, JY, Ney, V, Ney, A, Chern, MY, Melnikov, A, Pezzagna, S, Reuter, D, Wieck, AD & Massies, J 2011, 'Structural, optical, and magnetic properties of Ho-implanted GaN thin films', Journal of Physics: Conference Series, vol. 266, no. 1, 012097. https://doi.org/10.1088/1742-6596/266/1/012097
Lo, F. Y. ; Guo, J. Y. ; Ney, V. ; Ney, A. ; Chern, M. Y. ; Melnikov, A. ; Pezzagna, S. ; Reuter, D. ; Wieck, A. D. ; Massies, J. / Structural, optical, and magnetic properties of Ho-implanted GaN thin films. In: Journal of Physics: Conference Series. 2011 ; Vol. 266, No. 1.
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AU - Melnikov, A.

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