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Advances in Atomic Force Microscopy for the Electromechanical Characterization of Piezoelectric and Ferroelectric Nanomaterials
Kwanlae Kim
Korean J. Met. Mater. 2022;60(9):629-643.   Published online 2022 Aug 30
DOI: https://doi.org/10.3365/KJMM.2022.60.9.629

Given the social demand for self-powering wearable electronics, it is necessary to develop composite materials that exhibit both good flexibility and excellent piezoelectric performances. Intensive research on synthesis methods and devising characterization techniques for piezoelectric nanomaterials in various forms has been conducted. In particular, characterization techniques for piezoelectric nanomaterials require..... More

A Brief Review on the Ferroelectric Fluorite-Structured Nanolaminate
강유전성 플루오라이트 구조 기반 나노라미네이트 리뷰
Kun Yang, Ju Yong Park, Dong Hyun Lee, Se Hyun Kim, Geun Taek Yu, Geun Hyeong Park, Eun Been Lee, Je In Lee, Min Hyuk Park
양건, 박주용, 이동현, 김세현, 유근택, 박근형, 이은빈, 이제인, 박민혁
Korean J. Met. Mater. 2021;59(12):849-856.   Published online 2021 Nov 19
DOI: https://doi.org/10.3365/KJMM.2021.59.12.849

Ferroelectricity can be induced in fluorite-structured oxides such as HfO2 and ZrO2, a feature of increasing interest in both academia and industry. Initially, most research focused on solid solution films, but recently, it has been suggested that nanolaminates with independent HfO2 and ZrO2 layers may show electrical and physical properties..... More

Domain Wall Motions in a Near-Morphotropic Pb(Zr,Ti)O3 Under Mechanical Stress Observed by In Situ Piezoresponse Force Microscopy
Kwanlae Kim
Korean J. Met. Mater. 2019;57(1):38-42.   Published online 2018 Dec 14
DOI: https://doi.org/10.3365/KJMM.2019.57.1.38

Many important material properties of ferroelectric ceramics such as piezoelectric coefficient and hysteresis curve are governed by domain structures and their evolution processes. In the present work, domain wall motions in a near-morphotropic Pb(Zr,Ti)O3 under an external compressive stress were observed using in situ piezoresponse force microscopy (PFM). This specific..... More

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