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(a) Photograph of Mn:NKBT8 single crystal grown by the TSSG method and (b) HRTEM image taken along the  zone axis, SAED patterns taken along (c) , and (d)  zone axis, where the 1/2(ooo) superlattice reflections were marked by rings, 1/2(ooe) ones by arrows, respectively.
(a) X-band EPR spectrum for Mn:NKBT8 single crystal and (b) leakage current density as a function of applied electric field for Mn:NKBT8 and stoichiometric NKBT8 single crystals.
Temperature dependent electrical properties for Mn:NKBT8 single crystal: (a) Dielectric constant εr and loss factor tanδ; (b) polarization hysteresis loops; (c) remnant polarization (Pr) and coercive field (Ec); and (d) maximum bipolar and unipolar strains. All the ferroelectric properties were measured under a maximum DC electric field of 5 kV/mm.
Electrical properties of NKBT single crystals.
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