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Makoto Iwata,Ryo Nagahashi,Masaki Maeda,Yoshihiro Ishibashi 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.9
The temperature and the DC biasing-field dependences of the dielectric permittivities along the [001]c, [011]c, and [111]c directions of the pseudocubic coordinates have been investigated in Pb(Zn1/3Nb2/3)O3-xPbTiO3 (x = 6%). The temperature-electric-field phase diagrams have been clarified in the field range below 8 kV/cm. The critical endpoint has been found at 1.3 kV/cm and 164 ◦ C for an electric field applied along the [001]c direction. The concentration dependences of the critical temperature and the transition temperature are discussed. The expected transition temperature T0(x) at which the second-order phase transition would occur is shown to be determined by the transition temperature TCT (x) and the critical temperature TCEP (x).