Growth and characterization of nonpolar, heavily Mn-substituted ZnO films

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Q. Shao
  • P. S. Ku
  • X. L. Wang
  • W. F. Cheng
  • C. W. Leung

Detail(s)

Original languageEnglish
Article number17D703
Journal / PublicationJournal of Applied Physics
Volume115
Issue number17
Publication statusPublished - 7 May 2014

Abstract

Eight percent of Mn was successfully diluted into nonpolar ZnO films deposited by pulsed laser deposition on single crystal (100) SrTiO3 substrates. X-ray diffraction patterns and energy-dispersive X-ray spectroscopy confirmed high crystallinity of the films and excluded unintentional magnetic doping. A unique surface domain structure was observed by scanning electron microscope and atomic force microscope, which might play a vital role to strain release induced by lattice mismatch between nonpolar (11-20) ZnO film and (100) SrTiO3 substrate. In addition, the films showed strong ferromagnetism with a large coercivity HC ∼180Oe at room temperature. The large magnetic moment is ascribed to carrier-mediated exchange interaction between the Mn ions, where the majority of the carriers are oxygen vacancies. © 2014 AIP Publishing LLC.

Citation Format(s)

Growth and characterization of nonpolar, heavily Mn-substituted ZnO films. / Shao, Q.; Ku, P. S.; Wang, X. L.; Cheng, W. F.; Leung, C. W.; Ruotolo, A.

In: Journal of Applied Physics, Vol. 115, No. 17, 17D703, 07.05.2014.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal