Paramagnetic dysprosium-doped zinc oxide thin films grown by pulsed-laser deposition

Fang Yuh Lo, Yi Chieh Ting, Kai Chieh Chou, Tsung Chun Hsieh, Cin Wei Ye, Yung Yuan Hsu, Ming Yau Chern, Hsiang Lin Liu

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Dysprosium(Dy)-doped zinc oxide (Dy:ZnO) thin films were fabricated on c-oriented sapphire substrate by pulsed-laser deposition with doping concentration ranging from 1 to 10 at.-%. X-ray diffraction (XRD), Raman-scattering, optical transmission spectroscopy, and spectroscopic ellipsometry revealed incorporation of Dy into ZnO host matrix without secondary phase. Solubility limit of Dy in ZnO under our deposition condition was between 5 and 10 at.-% according to XRD and Raman-scattering characteristics. Optical transmission spectroscopy and spectroscopic ellipsometry also showed increase in both transmittance in ultraviolet regime and band gap of Dy:ZnO with increasing Dy density. Zinc vacancies and zinc interstitials were identified by photoluminescence spectroscopy as the defects accompanied with Dy incorporation. Magnetic investigations with a superconducting quantum interference device showed paramagnetism without long-range order for all Dy:ZnO thin films, and a hint of antiferromagnetic alignment of Dy impurities was observed at highest doping concentration - indicating the overall contribution of zinc vacancies and zinc interstitials to magnetic interaction was either neutral or toward antiferromagnetic. From our investigations, Dy:ZnO thin films could be useful for spin alignment and magneto-optical applications.

Original languageEnglish
Article number213911
JournalJournal of Applied Physics
Volume117
Issue number21
DOIs
Publication statusPublished - 2015 Jun 7

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dysprosium
zinc oxides
pulsed laser deposition
thin films
zinc
ellipsometry
interstitials
alignment
Raman spectra
spectroscopy
paramagnetism
diffraction
transmittance
sapphire
x rays
solubility
photoluminescence
interference
impurities
defects

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Paramagnetic dysprosium-doped zinc oxide thin films grown by pulsed-laser deposition. / Lo, Fang Yuh; Ting, Yi Chieh; Chou, Kai Chieh; Hsieh, Tsung Chun; Ye, Cin Wei; Hsu, Yung Yuan; Chern, Ming Yau; Liu, Hsiang Lin.

In: Journal of Applied Physics, Vol. 117, No. 21, 213911, 07.06.2015.

Research output: Contribution to journalArticle

Lo, Fang Yuh ; Ting, Yi Chieh ; Chou, Kai Chieh ; Hsieh, Tsung Chun ; Ye, Cin Wei ; Hsu, Yung Yuan ; Chern, Ming Yau ; Liu, Hsiang Lin. / Paramagnetic dysprosium-doped zinc oxide thin films grown by pulsed-laser deposition. In: Journal of Applied Physics. 2015 ; Vol. 117, No. 21.
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