Dataset associated with 'Effects of poling and crystallinity on the dielectric properties of Pb(In1/2Nb1/2)-Pb(Mn1/3Nb2/3)-PbTiO3 at cryogenic temperatures'

We provide dielectric data (real permittivity, imaginary permittivity, relative permittivity, loss tangent) as a function of temperature and frequency for the relaxor-ferroelectric Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 with nominal composition 28%(PIN)-40%(PMN)-32%(PT). The data are for three samples: an (001) cut single crystal, a (111) cut single crystal, a polycrystalline ceramic. Permittivity data were measured for both a poled and depoled state for each sample, at cryogenic temperatures down to 20 K and above room temperature up to 800 K. Low temperature dielectric relaxation peak positions for the poled (001) crystal have been extracted and fitted to a Vogel-Fulcher function. The dielectric data are accompanied by room temperature characterisation of the piezoelectric charge coefficients.