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Phase Separation in Multiple ZnO /Cubic- MgxZn1−xO Superlattice Heterostructures Observed Via High Resolution Transmission Electron Microscopy

Published online by Cambridge University Press:  17 March 2011

A. Kvit ,
G. Dusher ,
A. K. Sharma ,
C. Jin ,
J. Narayan ,
J. Muth  and
C.W Teng
A. Kvit
Affiliation:
NSF Center for Advanced Materials and Smart Structures, Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7916
G. Dusher
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6048
A. K. Sharma
Affiliation:
NSF Center for Advanced Materials and Smart Structures, Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7916
C. Jin
Affiliation:
NSF Center for Advanced Materials and Smart Structures, Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7916
J. Narayan
Affiliation:
NSF Center for Advanced Materials and Smart Structures, Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7916
J. Muth
Affiliation:
Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, NC 27695-7911
C.W Teng
Affiliation:
Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, NC 27695-7911
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Abstract

We have synthesized ZnMgO alloy of wurtzite (Mg content equals to 0.0=0.34) and cubic (Zn content equals to 0.0- 0.18) phases using nonequilibrium pulsed laser deposition method. Epitaxial films of ZnMgO wurtzite structure have been grown on (0001) sapphire substrates. Using JEOL-2010 field-emission transmission electron microscope equipped with STEM and Gatan image filter, we can perform atomic structure, STEM-Z, electron energy loss spectroscopy and imaging simultaneously. Such studies on the ZnO/MgZnO superlattices provide first direct evidence of phase-separation in the range 3 nm.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 639: Symposium G – GaN and Related Alloys-2000 , 2000 , G6.50
Copyright
Copyright © Materials Research Society 2001

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References

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