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New epitaxy paradigm in epitaxial self-assembled oxide vertically aligned nanocomposite thin films

Published online by Cambridge University Press:  24 July 2017

Jijie Huang ,
Judith L. MacManus-Driscoll  and
Haiyan Wang
Jijie Huang
Affiliation:
School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, USA
Judith L. MacManus-Driscoll
Affiliation:
Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 OFS, U.K.
Haiyan Wang*
Affiliation:
School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, USA; and School of Electrical and Computer Engineering, West Lafayette, Indiana 47907, USA
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

Self-assembled oxide-based vertically aligned nanocomposite (VAN) thin films have aroused tremendous research interest in the past decade. The interest arises from the range of unique nanostructured films which can form and the multifunctionality arising from these forms. Hence, a large number of oxide VAN systems have been demonstrated and explored for enhancing specific physical properties, such as strain-enhanced ferroelectricity, tunable magnetotransport, and novel electrical/ionic transport properties. The epitaxial growth of the nanocomposite thin films and the coupling at the heterogeneous interfaces are critical considerations for future device applications. In this review, the advantages of strain coupling along vertical interfaces and film-substrate interfaces in nanocomposite films over conventional single phase films are discussed. Specifically, a unique strain compensation model enabling the epitaxial growth of two-phase nanocomposites having large lattice mismatch with substrates is proposed. Out-of-plane strain coupling between the two phases is also discussed in terms of designing strain states for desired functionalities.

Keywords

thin filmepitaxycomposite
Type
Invited Reviews
Information
Journal of Materials Research , Volume 32 , Issue 21: Focus Issue: Jan van der Merwe: Epitaxy and the Computer Age , 14 November 2017 , pp. 4054 - 4066
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Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Mmantsae Diale

This section of Journal of Materials Research is reserved for papers that are reviews of literature in a given area.

References

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