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(Color online) The Brillouin spectra of PZT-0.45 measured at a few temperatures in (a) a narrow and (b) a wide frequency range.
(Color online) The temperature dependences of the Brillouin frequency shift and the FWHM of the LA mode for (a) PZT-0.45 and (b) PZT-0.42. The insets show the extended view of the minimum of the Brillouin frequency shift of each sample.
(Color online) The temperature dependence of the inverse of the relaxation time estimated from the width of CP and the integrated intensity of PZT-0.45.
(Color online) The phase diagram of PZT constructed based on published data and present results.1,2,5,6,11 The full circle symbols were from Ref. 5, and the blue star and blue triangle corresponding to the minimum temperature of the shear modulus were taken from Refs. 6 and 11, respectively. The red diamonds were from the current study. C, T, and R denote the cubic, tetragonal, and rhombohedral phases. M1 and M2 denote untilted and tilted monoclinic phases. The vertical dashed line delimits the M and R phases, the concentration of which is not well defined at present.
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