87 citations · 163 across the 5 of their papers we have counts for
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Anomalously Abrupt Switching of Ferroelectric Wurtzites
Keisuke Yazawa, John Hayden, Jon-Paul Maria +4
Ferroelectric polarization switching is one common example of a process that occurs via nucleation and growth, and understanding switching kinetics is crucial for applications such…
A Landau-Devonshire Analysis of Strain Effects on Ferroelectric Al1-xScxN
Keisuke Yazawa, Andriy Zakutayev, Geoff L. Brennecka
We present a thermodynamic analysis of the recently discovered nitride ferroelectric materials using the classic Landau-Devonshire approach. The electrostrictive and dielectric sti…
Ionic Bonds Control Ferroelectric Behavior in Wurtzite Nitrides
Keisuke Yazawa, John Mangum, Prashun Gorai +2
Ferroelectricity enables key integrated technologies from non-volatile memory to precision ultrasound. Wurtzite ferroelectric Al1-xScxN has recently attracted attention because of…
Improving Reproducibility of Sputter Deposited Ferroelectric Wurtzite Al0.6Sc0.4N Films using In-situ Optical Emission Spectrometry
Daniel Drury, Keisuke Yazawa, Allison Mis +3
High-Sc Al1-xScxN thin films are of tremendous interest because of their attractive piezoelectric and ferroelectric properties, but overall film quality and reproducibility are wid…
Reduced Coercive Field in Epitaxial Thin Film of Ferroelectric Wurtzite Al0.7Sc0.3N
Keisuke Yazawa, Daniel Drury, Andriy Zakutayev +1
The first epitaxial ferroelectric wurtzite film with clear polarization-electric field hysteresis behavior is presented. The coercive field of this epitaxial Al0.7Sc0.3N film on W/…