Diffraction theory of nanotwin superlattices with low symmetry phase

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Date
2006-09-18
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Volume Title
Publisher
American Physical Society
Abstract

A nanotwin diffraction theory is developed. It predicts an adaptive diffraction phenomenon, where the Bragg reflection peaks are determined by coherent superposition of scattered waves from individual twin-related nanocrystals and adaptively shift along the twin peak splitting vectors in response to a change in the twin variant volume fraction. Application of this theory to tetragonal phase explains the intrinsic lattice parameter relationships of monoclinic M-C phase recently discovered in ferroelectric Pb[(Mg1/3Nb2/3)(1-x)Ti-x]O-3 and Pb[(Zn1/3Nb2/3)(1-x)Ti-x]O-3.

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Keywords
Martensitic transformations, Systems, Crystals, Physics
Citation
Wang, Yu U., Sep 2006. "Diffraction theory of nanotwin superlattices with low symmetry phase," PHYSICAL REVIEW B 74(10): 104109. DOI: 10.1103/PhysRevB.74.104109