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Nanocharacterization of the negative stiffness of ferroelectric materials
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SYSNO ASEP 0436159 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Nanocharacterization of the negative stiffness of ferroelectric materials Author(s) Skandani, A.A. (US)
Čtvrtlík, Radim (FZU-D) RID, ORCID
Al-Haik, M. (US)Source Title Applied Physics Letters. - : AIP Publishing - ISSN 0003-6951
Roč. 105, č. 8 (2014), "082906-1"-"082906-5"Number of pages 5 s. Language eng - English Country US - United States Keywords ferroelectric materials ; negative stiffness ; thermomechanical environments Subject RIV JJ - Other Materials R&D Projects TA03010743 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Institutional support FZU-D - RVO:68378271 UT WOS 000342753500057 EID SCOPUS 84907345990 DOI 10.1063/1.4894274 Annotation Phase changing materials such as ferroelectric materials could exhibit negative stiffness under certain thermomechanical environments. This negative stiffness is embodied by a deflection along the opposite direction of the applied load. So far negative stiffness materials were investigated with the specific morphology of embedded inclusions in stiff matrices then the resulting composite is studied to measure the behavior of each constituent indirectly. In this study, a modified nonisothermal nanoindentation method is developed to measure the negative stiffness of triglycine sulfate single crystal directly. This in-situ method is intended to first demonstrate the feasibility of detecting the negative stiffness via nanoindentation and nanocreep of a ferroelectric material at its Curie point and then to quantify the negative stiffness without the need for embedding the crystal within a stiffer matrix. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2015
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