English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Ferroelectric polarization switching is one common example of a process thatoccurs via nucleation and growth, and understanding switching kinetics iscrucial for applications such as ferroelectric memory. Here we describe andinterpret anomalous switching dynamics in the wurtzite nitride thin filmferroelectrics Al0.7Sc0.3N and Al0.94B0.06N using a general model that can bedirectly applied to other abrupt transitions that proceed via nucleation andgrowth. When substantial growth and impingement occur while nucleation rate isincreasing, such as in these wurtzite ferroelectrics under high electricfields, abrupt polarization reversal leads to very large Avrami coefficients(e.g., n = 11), inspiring an extension of the KAI (Kolmogorov-Avrami-Ishibashi)model. We apply this extended model to two related but distinct scenarios thatcrossover between (typical) behavior described by sequential nucleation andgrowth and a more abrupt transition arising from significant growth prior topeak nucleation rate. This work therefore provides more complete description ofgeneral nucleation and growth kinetics applicable to any system whilespecifically addressing both the anomalously abrupt polarization reversalbehavior in new wurtzite ferroelectrics.

Anomalously Abrupt Switching of Ferroelectric Wurtzites