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Title:X-Ray Scattering Study of the Transition Dynamics in Relaxor Ferroelectric Lead (Magnesium(1/3) Niobium(2/3)) Oxygen(3) (Pmn)
Author(s):Gosula, Vijaya Reddy
Doctoral Committee Chair(s):Chen, Haydn
Department / Program:Materials Science and Engineering
Discipline:Materials Science and Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Engineering, Materials Science
Abstract:Thermal diffuse scattering measurements were performed at several temperatures. A [011] transverse optic soft mode was determined to exist. The temperature dependence of this phonon mode was carefully studied as the transition is approached, and down to 40 K. The q-dependency of the freezing process was carefully studied, and it was shown that the freezing takes place simultaneously at the zone center (ZC) and zone boundary (ZB). Coupled with results obtained from the SRO peak, these results imply that both ferroelectric and anti-ferroelectric fluctuations are present in the structure. (Abstract shortened by UMI.).
Issue Date:2000
Description:157 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2000.
Other Identifier(s):(MiAaPQ)AAI9971084
Date Available in IDEALS:2015-09-25
Date Deposited:2000

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