Properties of YMnO{sub 3} self-assembled nanocrystalline prisms on GaN

Journal Article · Mon Jan 07 00:00:00 EST 2008 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2831003· OSTI ID:21016268

Keenan, Cameron; Chandril, Sandeep; Myers, Thomas H; Lederman, David; Ramos-Moore, E; Cabrera, A L ^[1]

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1. Multifunctional Materials Laboratory, Department of Physics, West Virginia University, Morgantown, West Virginia 26506-6315 (United States)

Growth of YMnO{sub 3} on GaN (0001) using molecular beam epitaxy at temperatures greater than 850 deg. C resulted in the spontaneous formation of crystalline prisms, ranging from 20 to 60 nm in height and 50 to 500 nm in lateral size, surrounded by a 6 nm thick continuous YMnO{sub 3} film. The local dielectric properties were measured using scanning surface probe microscopy. The prisms were ferroelectric at room temperature and their ferroelectric properties were enhanced for taller prisms. This is consistent with these structures being less constrained than the continuous layer, which is clamped by the surrounding unpolarized film.

• OSTI ID: 21016268
• Journal Information: Applied Physics Letters, Vol. 92, Issue 1; Other Information: DOI: 10.1063/1.2831003; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTALS
DIELECTRIC PROPERTIES
FERROELECTRIC MATERIALS
GALLIUM NITRIDES
LAYERS
MANGANATES
MICROSCOPY
MOLECULAR BEAM EPITAXY
NANOSTRUCTURES
PRISMS
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
YTTRIUM COMPOUNDS