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

Martin A, Kakimoto KI, Hatano K, Doshida Y, Webber KG (2017)

Publication Language: English

Publication Status: Published

Publication Type: Journal article

Publication year: 2017

Journal

Journal of Applied Physics AIP Publishing

Publisher: AMER INST PHYSICS

Book Volume: 122

Journal Issue: 20

DOI: 10.1063/1.4989759

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.

Authors with CRIS profile

Alexander Martin Lehrstuhl für Glas und Keramik Kyle Grant Webber Professur für Werkstoffwissenschaften (Funktionskeramik)

Involved external institutions

Taiyo Yuden / 太陽誘電株式会社 JP Japan (JP) Nagoya Institute of Technology / 名古屋工業大学 Nagoya Kōgyō Daigaku JP Japan (JP)

How to cite

APA:

Martin, A., Kakimoto, K.-I., Hatano, K., Doshida, Y., & Webber, K.G. (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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