Ferroelastic behavior across the orthorhombic-to-tetragonal phase transition region of NKN-based lead-free ferroelectrics

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Details zur Publikation

Autor(en): Martin A, Kakimoto KI, Hatano K, Doshida Y, Webber K
Zeitschrift: Journal of Applied Physics
Verlag: AMER INST PHYSICS
Jahr der Veröffentlichung: 2017
Band: 122
Heftnummer: 20
ISSN: 0021-8979
Sprache: Englisch


Abstract


In this study, the macroscopic mechanical behavior was characterized as a function of temperature (-150 degrees C to 400 degrees C) for polycrystalline (Na0.5K0.5)NbO3 with three dopant concentrations. Dopants can improve certain electromechanical properties and, in the case of NKN and Li+, shift the orthorhombic-to-tetragonal phase transition temperature to lower temperatures. In this study, the mechanical behavior of undoped NKN, LNKN6 with 6 mol. % Li+, and LNKN6 with additional dopants was characterized and compared with the temperature dependent dielectric response and crystal structure. During mechanical loading, the samples showed a nonlinear hysteretic response. At low temperatures, this is understood to be due to ferroelasticity. At temperatures in the vicinity of the orthorhombic-tetragonal phase transition temperature, a closed hysteresis behavior was observed, corresponding to a local maximum of the critical ferroelastic stress and a minimum in the remanent strain. The observed closed hysteresis behavior is suggested to be due to a stress-induced structural phase transformation. Published by AlP Publishing.



FAU-Autoren / FAU-Herausgeber

Martin, Alexander Dr.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Webber, Kyle Prof.
Professur für Werkstoffwissenschaften (Funktionskeramik)


Autor(en) der externen Einrichtung(en)
Nagoya Institute of Technology / 名古屋工業大学 Nagoya Kōgyō Daigaku
Taiyo Yuden / 太陽誘電株式会社


Zitierweisen

APA:
Martin, A., Kakimoto, K.-I., Hatano, K., Doshida, Y., & Webber, K. (2017). Ferroelastic behavior across the orthorhombic-to-tetragonal phase transition region of NKN-based lead-free ferroelectrics. Journal of Applied Physics, 122(20). https://dx.doi.org/10.1063/1.4989759

MLA:
Martin, Alexander, et al. "Ferroelastic behavior across the orthorhombic-to-tetragonal phase transition region of NKN-based lead-free ferroelectrics." Journal of Applied Physics 122.20 (2017).

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Zuletzt aktualisiert 2018-10-08 um 22:25