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

Journal Article · Wed May 07 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4862846· OSTI ID:22273901

Shao, Q.; Ku, P. S.; Wang, X. L.; Cheng, W. F.; Leung, C. W. ^[1]

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1. Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR (China)

Eight percent of Mn was successfully diluted into nonpolar ZnO films deposited by pulsed laser deposition on single crystal (100) SrTiO{sub 3} 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) SrTiO{sub 3} substrate. In addition, the films showed strong ferromagnetism with a large coercivity H{sub C} ∼ 180 Oe 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.

• OSTI ID: 22273901
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMIC FORCE MICROSCOPY
COERCIVE FORCE
CRYSTAL GROWTH
DOMAIN STRUCTURE
ENERGY BEAM DEPOSITION
EXCHANGE INTERACTIONS
FERROMAGNETISM
LASER RADIATION
MAGNETIC MOMENTS
MANGANESE IONS
MONOCRYSTALS
PULSED IRRADIATION
SCANNING ELECTRON MICROSCOPY
SUBSTRATES
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
VACANCIES
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY
ZINC OXIDES