We have just published in Journal of the American Ceramic Society a new paper on the effects of the grain size reduction on the relaxor characteristics for a composition that is already a canonical relaxor with a nonergodic state at room temperature: (Bi0.5Na0.5)1‐xBaxTiO3 (BNBT):

Ergodicity of fine‐grained canonical relaxor ferroelectric (Bi_0.5Na_0.5)_1‐xBa_xTiO₃ films
Salazar, N; Pérez‐Mezcua, D; Calzada, ML; Gil, A; Ricote, J
Journal of the American Ceramic Society 102, 5941–5951 (2019)