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http://hdl.handle.net/10397/24939
Title: | Growth and characterization of nonpolar, heavily Mn-substituted ZnO films | Authors: | Shao, Q Ku, PS Wang, XL Cheng, WF Leung, CW Ruotolo, A |
Issue Date: | 2014 | Source: | Journal of applied physics, 2014, v. 115, no. 17, 17D703, p. 17D703-1-17D703-3 | 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. | Publisher: | American Institute of Physics | Journal: | Journal of applied physics | ISSN: | 0021-8979 | EISSN: | 1089-7550 | DOI: | 10.1063/1.4862846 | Rights: | © 2014 AIP Publishing LLC. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Q. Shao et al., J. Appl. Phys. 115, 17D703 (2014) and may be found at https://dx.doi.org/10.1063/1.4862846 |
Appears in Collections: | Journal/Magazine Article |
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Shao_Growth_Nonpolar_Heavily.pdf | 1.06 MB | Adobe PDF | View/Open |
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