Generic Influences of Charged Defects on the Structure-Property Relationships of Modified Ferroelectric Barium Titanate and Antiferroelectric Sodium Niobate

Zhang, Ruitao

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Title:	Generic Influences of Charged Defects on the Structure-Property Relationships of Modified Ferroelectric Barium Titanate and Antiferroelectric Sodium Niobate
Author(s):	Zhang, Ruitao
Doctoral Committee Chair(s):	Dwight Viehland
Department / Program:	Materials Science and Engineering
Discipline:	Materials Science and Engineering
Degree Granting Institution:	University of Illinois at Urbana-Champaign
Degree:	Ph.D.
Genre:	Dissertation
Subject(s):	Engineering, Materials Science
Abstract:	A preliminary two-dimensional cellular automaton model of defect distribution was proposed based on space charge neutrality considerations. It used only pairwise nearest-neighbor interactions and neglected the elastic effects associated with lattice distortions. Simulations demonstrated a general distribution pattern for charged defects. With increasing substituent concentration, more and larger defect clusters formed, which might be related with the formation of polar nanodomains in the modified ferroelectric BaTiO3. The influence of charged defects on field-induced AFE-FE transition was discussed in terms of elastic strain effects.
Issue Date:	1999
Type:	Text
Language:	English
Description:	175 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1999.
URI:	http://hdl.handle.net/2142/82919
Other Identifier(s):	(MiAaPQ)AAI9945041
Date Available in IDEALS:	2015-09-25
Date Deposited:	1999