Phase diagram, PLZT

The PLZT phase diagram is given in Figure 2. As can be seen, the overall effect of adding lanthanum to the PZT system is one of decreasing the stability of the ferroelectric (FE) phases (a ferroelectric material possesses spontaneous internal polarization,... 

Figure 2, Room temperature phase diagram of the PLZT system illustrating phases present and typical hysteresis loops associated with each phase compositions 1, 2 and 3 are 9565, 7065 and 12040, respectively...

The PLZT phase diagram at room temperature is shown in Figure 32.21. The compositions are specified by three successive numbers, e.g., 8.5/65/35, which... 

FIGURE 32.21 The PLZT phase diagram. A, memory B, linear C, quadratic. 

There are two common types of electro-optic birefringent effects within the PLZT compositional phase diagram, i.e., (i) nonmemory quadratic (Kerr effect) and (ii) memory hnear (Pockel effect). The respective electro-optic coefficients for these effects are calculated by using the following relationships ... 

Figures 3 and 4 clearly illustrate how such a small change in the chemical composition of the PLZT can strongly affect the material s properties PLZT (9.5/65/35) samples appear to possess a higher electric displacement compared to PLZT (9.0/65/35) at identical field values, but the hysteresis is slightly slimmer for the (9.0/65/35) composition samples. From Haertling s room temperature phase diagram of PLZT (Haertling 1987), it can be seen that...

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