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

doi:10.1063/1.4862846

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 publication › Journal article › Academic research › peer-review

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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 language	English
Article number	17D703
Journal	Journal of Applied Physics
Volume	115
Issue number	17
DOIs	https://doi.org/10.1063/1.4862846
Publication status	Published - 7 May 2014

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.4862846

http://hdl.handle.net/10397/24939

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

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.",

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AU - Shao, Q.

AU - Ku, P. S.

AU - Wang, X. L.

AU - Cheng, W. F.

AU - Leung, Chi Wah

AU - Ruotolo, A.

PY - 2014/5/7

Y1 - 2014/5/7

N2 - 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.

AB - 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.

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

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