TY - JOUR
T1 - The Interplay Between Ferroelectricity and Electrochemical Reactivity on the Surface of Binary Ferroelectric AlxB1-xN
AU - Liu, Yongtao
AU - Ievlev, Anton
AU - Casamento, Joseph
AU - Hayden, John
AU - Trolier-McKinstry, Susan
AU - Maria, Jon Paul
AU - Kalinin, Sergei V.
AU - Kelley, Kyle P.
N1 - Publisher Copyright:
© 2023 Oak Ridge National Laboratory and The Authors. Advanced Electronic Materials published by Wiley-VCH GmbH.
PY - 2024/2
Y1 - 2024/2
N2 - Polarization dynamics and domain structure evolution in ferroelectric Al0.93B0.07N are studied using piezoresponse force microscopy and spectroscopies in ambient and controlled atmosphere environments. The application of negative unipolar and bipolar first-order reverse curve (FORC) waveforms leads to a protrusion-like feature on the Al0.93B0.07N surface and a reduction of electromechanical response due to electrochemical reactivity. A surface change is also observed on the application of fast alternating current bias. At the same time, the application of positive biases does not lead to surface changes. Comparatively in a controlled glove box atmosphere, stable polarization patterns can be observed, with minuscule changes in surface morphology. This surface morphology change is not isolated to applying biases to free surface, a similar topographical change is also observed at the electrode edges when cycling a capacitor in an ambient environment. The study suggests that surface electrochemical reactivity may have a significant impact on the functionality of this material in the ambient environment. However, even in the controlled atmosphere, the participation of the surface ions in polarization switching phenomena and ionic compensation is possible.
AB - Polarization dynamics and domain structure evolution in ferroelectric Al0.93B0.07N are studied using piezoresponse force microscopy and spectroscopies in ambient and controlled atmosphere environments. The application of negative unipolar and bipolar first-order reverse curve (FORC) waveforms leads to a protrusion-like feature on the Al0.93B0.07N surface and a reduction of electromechanical response due to electrochemical reactivity. A surface change is also observed on the application of fast alternating current bias. At the same time, the application of positive biases does not lead to surface changes. Comparatively in a controlled glove box atmosphere, stable polarization patterns can be observed, with minuscule changes in surface morphology. This surface morphology change is not isolated to applying biases to free surface, a similar topographical change is also observed at the electrode edges when cycling a capacitor in an ambient environment. The study suggests that surface electrochemical reactivity may have a significant impact on the functionality of this material in the ambient environment. However, even in the controlled atmosphere, the participation of the surface ions in polarization switching phenomena and ionic compensation is possible.
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U2 - 10.1002/aelm.202300489
DO - 10.1002/aelm.202300489
M3 - Article
AN - SCOPUS:85176273240
SN - 2199-160X
VL - 10
JO - Advanced Electronic Materials
JF - Advanced Electronic Materials
IS - 2
M1 - 2300489
ER -