Superelasticity is very common in shape memory alloys but is rather difficult to realize in ferroelectric ceramics and had never appeared in normal ferroelectric single crystals. Here we show that guided by a proposed incremental 90° domain switching criterion, large and electric-field-tunable superelastic strains up to 0.85% has been realized in a specially poled BaTiO3 crystal cube via compression loading/unloading with a positive dc bias electric field along the poling direction. Moreover, the tunable superelasticity has a large damping factor of up to 0.76, which is very promising in intelligent damping devices.
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See supplementary material at http://dx.doi.org/10.1063/1.4795330 for P-E hysteresis loop and butterfly curve of a poled BaTiO3 crystal, testing setup, domain switching criterion, and mechanical depolarization curves at a dc bias field of 800 V/mm.
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2013
American Institute of Physics
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