title: High-resolution calorimetric study of Pb(Mg(1/3)Nb(2/3))O3 single crystal.
abstract: Motivated by the long-standing unresolved enigma of the relaxor ferroelectric ground state, we performed a high-resolution heat capacity and polarization study of the field-induced phase transition in the relaxor ferroelectric single crystal Pb(Mg(1/3)Nb(2/3))O3 (PMN) oriented along the [110] direction. We show that the discontinuous evolution of polarization as a function of the electric field or temperature is a consequence of a true first order transition from a glassy to ferroelectric state, which is accompanied by an excess heat capacity anomaly and released latent heat. We also find that in a zero field there is no ferroelectric phase transition in bulk PMN at any temperature, indicating that the nonergodic dipolar glass phase persists down to the lowest temperatures.
authors.affiliation: Institute Jožef Stefan, Jamova 39, 1000 Ljubljana, Slovenia.
authors.forename: Nikola
authors.initials: N
authors.lastname: Novak
authors.forename: Raša
authors.initials: R
authors.lastname: Pirc
authors.forename: Magdalena
authors.initials: M
authors.lastname: Wencka
authors.forename: Zdravko
authors.initials: Z
authors.lastname: Kutnjak