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Article
Local Vibrational Modes Competitions in Mn-Doped ZnO Epitaxial Films with Tunable Ferromagnetism
Journal of Applied Physics
  • Qiang Cao, Shandong University
  • Maoxiang Fu, Shandong University
  • Guolei Liu, Shandong University
  • Huaijin Zhang, Shandong University
  • Shishen Yan, Shandong University
  • Yanxue Chen, Shandong University
  • Liangmo Mei, Shandong University
  • Jun Jiao, Portland State University
Document Type
Article
Publication Date
6-1-2014
Subjects
  • Epitaxy,
  • Spectrum Analysis (Raman),
  • Surfaces (Physics)
Abstract

We reported spectroscopic investigations of high quality Mn-doped ZnO (ZnMnO) films grown by oxygen plasma-assisted molecular beam epitaxy. Raman scattering spectra revealed two local vibrational modes (LVMs) associated with Mn dopants at 523 and 712cm-1. The LVMs and magnetic properties of ZnMnO films can be synchronously modulated by post annealing processing or by introducing tiny Co. The relative intensity of two LVMs clearly shows competitions arising from uncompensated acceptor and donor defects competition for ferromagnetic and nonmagnetic films. The experimental results indicated that LVM at 523 cm-1 is attributed to Mn—(Zinc-vacancy) complexes, while LVM at 712 cm-1 is attributed to Mn—(Oxygen-vacancy) complexes .

Description

This is the publisher's final PDF. Article appears in Journal of Applied Physics (http://jap.aip.org/) and is copyrighted 2014 by the American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

DOI
10.1063/1.4885735
Persistent Identifier
http://archives.pdx.edu/ds/psu/12999
Citation Information
Cao, Q., Fu, M., Liu, G., Zhang, H., Yan, S., Chen, Y., ... & Jiao, J. (2014). Local vibrational modes competitions in Mn-doped ZnO epitaxial films with tunable ferromagnetism. Journal of Applied Physics, 115(24), 243906.