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

Q. Shao, P. S. Ku, X. L. Wang, W. F. Cheng, Chi Wah Leung, A. Ruotolo

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Eight percent of Mn was successfully diluted into nonpolar ZnO films deposited by pulsed laser deposition on single crystal (100) SrTiO3substrates. 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) SrTiO3substrate. 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.
Original languageEnglish
Article number17D703
JournalJournal of Applied Physics
Volume115
Issue number17
DOIs
Publication statusPublished - 7 May 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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