Staff member

Dr. Shinya KONDO (assistant professor) and Dr. Kosuke ONO (research assistant professor) join us today.

Dr. Xueyou YUAN was promoted to a research lecturer. Congrats!

Published: Dynamic Domain Motion Enhancing Electro-optic Performance in Ferroelectric Films

Our paper entitled “Dynamic Domain Motion Enhancing Electro-optic Performance in Ferroelectric Films” has been published in Appl. Phys. Lett. We found that rhombohedral (111)/(11-1)-PZT film, consisting of domains with two distinct out-of-plane polarization components, exhibited an enhanced EO response upon the application of an AC field of approximately 40 kV/cm. This enhanced EO response was directly related to field-induced reversible domain switching, as confirmed by electrical measurements and time-resolved synchrotron XRD. These results indicate that the dynamic domain motion in ferroelectrics is an effective strategy for enhancing the EO response.

Awarded: Mizuki ISHIDA

Mizuki ISHIDA won the presentation award of The 44th Electronics Division Meeting of the Ceramic Society of Japan held in Keio University, Japan for his presentation on doped pyrochlore dielectric materials.

Seminar: Prof. Guorong Li, Dr. Lei Meng, Dr. Xueyou Yuan

On Jul. 18, Prof. Guorong Li (Shanghai Institute of Ceramics) visited us and lectured on high-entropy ferroelectric ceramics. In addition, Dr. Lei Meng and Dr. Xueyou Yuan gave their seminars.

1) Fabrication and Properties of ABO3 Ferroelectric Ceramics with A- and B-site disorder for high-energy storage (Prof. Guorong Li)
2) Strong Second-order Nonlinear-polarization in Widegap ZnMgO Thin-films with Li Incorporation (Dr. Lei Meng)
3) Extraordinarily Large Extrinsic Contribution Ratio to Piezo-response in Monoclinic (K, Na)NbO3 Epitaxial Films (Dr. Xueyou Yuan)

Published: Ferroelectric Freestanding Hafnia Membranes with Metastable Rhombohedral Structure down to 1-nm-thick

Our collaborative paper with Kyoto University entitled “Ferroelectric Freestanding Hafnia Membranes with Metastable Rhombohedral Structure down to 1-nm-thick” has been published in Nat. Commun. We fabricated stable 1-nm-thick hafnia membranes exhibiting the metastable rhombohedral structure and out-of-plane ferroelectric polarizations as large as 13 μC/cm2.

Citation: NC 15, 1055196 (2024).

Seminar: Dr. Alexandros Emborasa

On Jun. 6, Dr. Alexandros Emborasa (ETH Zurich) visited us and lectured on neuromorphic computing.

Lecturer: Dr. Alexandros Emborasa (ETH Zurich)
Seminar title: Neuromorphic Computing: From Devices to Applications