Near room temperature dielectric transition in the perovskite formate framework [(CH(3))(2)NH(2)][Mg(HCOO)(3)]. by Pato-Doldán, B, Sánchez-Andújar, M, Gómez-Aguirre, L, Yáñez-Vilar, S, López-Beceiro, J, Gracia-Fernández, C, Haghighirad, A, Ritter, F, Castro-García, S, Señarís-Rodríguez, M