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SUMMARY:IMX Seminar Series - The kinetic evolution of domain microstructur
 es in ferroelectric ceramics – simulations vs. experiments
DTSTART:20230508T131500
DTEND:20230508T141500
DTSTAMP:20260428T040943Z
UID:cd04f902be66065f6c2ffe0c2f4521d971f81b5378cbb3ce24e3977d
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Dennis Kochmann\, ETHZ\nFerroelectric ceramics show intr
 icate domain microstructures\, which\, upon applying sufficient electric o
 r mechanical bias fields\, evolve over time and are responsible for the el
 ectro-mechanically coupled material behavior observable at larger scales. 
 Understanding the kinetic evolution of domains during polarization switchi
 ng is challenging\, as it involves mechanisms that extend from the atomic 
 scale of ferroelectric dipoles to the mesoscale of domain patterns to the 
 macroscopic device level. In this seminar\, we discuss phase-field modelin
 g strategies to simulate such processes with the overall objectives of (i)
  predicting realistic microstructures and (ii) capturing the intricate kin
 etic\, time-dependent evolution mechanisms. We will show that temperature-
 dependent phase-field models are appropriate for (i)\, while new approache
 s are required for (ii). Besides discussing the phase-field framework and 
 its predictions\, we also present experimental data that characterize the 
 rate dependence of polarization reversal and the underlying domain-scale m
 echanisms.
LOCATION:https://epfl.zoom.us/j/63993722592
STATUS:CONFIRMED
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