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

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.

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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://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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