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DTSTART:20070311T020000
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DTSTART:20071104T020000
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UID:7654660c-fac2-4a8b-aa1b-7b62491c802f.227975@calendar.missouristate.edu
CREATED:20230421T202159Z
LAST-MODIFIED:20230421T202159Z
LOCATION:Kemper Hall 204
SUMMARY:PAMS Seminar: "Phase-field modeling of Ferroelectrics: Polarizatio
 n Rotation and Flexoelectricity" by Dr. Yijia Gu
DESCRIPTION:Dr. Yijia GuMissouri University of Science and Technology\n\n\
 nAbstract:\n\n\nFerroelectric materials are a class of materials that exh
 ibit spontaneous electric polarization that can be reversed by an externa
 l electric field. These materials have unique electrical\, mechanical\, a
 nd optical properties\, making them useful in a wide range of application
 s such as memory devices\, sensors\, actuators\, and energy harvesting. I
 n this presentation\, we will present the phase-field model of ferroelect
 ric materials. In this first part\, the domain structure evolution during
  cooling and heating will be modeled. The stabilization of the metastable
  monoclinic phase and the mechanism of enhanced piezoelectric response wi
 ll be elucidated. The second part of this presentation will focus on the 
 flexoelectric effect\, which describes the linear coupling between strain
  gradient and electric polarization and between the polarization gradient
  and strain. The effect of flexoelectricity on mechanical domain switchin
 g and domain wall structures will be analyzed by phase-field simulations.
X-ALT-DESC;FMTTYPE=text/html:&lt;html&gt;&lt;head&gt;&lt;title&gt;&lt;/title&gt;&lt;/head&gt;&lt;body&gt;&lt;p&gt;&lt;b
 &gt;Dr.&amp;nbsp\;Yijia Gu&lt;/b&gt;&lt;br&gt;&lt;b&gt;Missouri University of Science and Technolo
 gy&lt;/b&gt;&lt;/p&gt;\n&lt;p&gt;Abstract:&lt;/p&gt;\n&lt;p&gt;&lt;span&gt;Ferroelectric materials are a clas
 s of materials that exhibit spontaneous electric polarization that can be
  reversed by an external electric field. These materials have unique elec
 trical\, mechanical\, and optical properties\, making them useful in a wi
 de range of applications such as memory devices\, sensors\, actuators\, a
 nd energy harvesting. In this presentation\, we will present the phase-fi
 eld model of ferroelectric materials. In this first part\, the domain str
 ucture evolution during cooling and heating will be modeled. The stabiliz
 ation of the metastable monoclinic phase and the mechanism of enhanced pi
 ezoelectric response will be elucidated. The second part of this presenta
 tion will focus on the flexoelectric effect\, which describes the linear 
 coupling between strain gradient and electric polarization and between th
 e polarization gradient and strain. The effect of flexoelectricity on mec
 hanical domain switching and domain wall structures will be analyzed by p
 hase-field simulations.&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;
DTSTART;TZID=America/Chicago:20230427T160000
DTEND;TZID=America/Chicago:20230427T170000
SEQUENCE:0
URL:https://physics.missouristate.edu/seminars.htm
CATEGORIES:Public,Alumni,Current Students,Faculty,Future Students,Staff
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