Pole figure poly

Fig. 12.9. Electron backscatter diffraction (EBSD) map showing the grain structure of a poly-Si film on glass prepared by the ALILE process (left) and the corresponding inverse pole figure showing the preferential (100) orientation of the poly-Si surface (right). The region used for the definition of the preferential (100) orientation -R(ioo) is indicated by a dashed line (20° tilt with respect to the perfect (100) orientation). The sample was annealed at 425°C for 16 h. Afterwards the Al(+Si) top layer was removed by CMP. The area under investigation was 80 x 80 pm2. Red, green and blue correspond to (100), (110) and (111), respectively, (from [39])...

X-ray diffraction pole figure measurements on a poly(vinyl fluoride) film [91]. 

A. J. Bur, I. D. Barnes, and K. J. Wahlstrand. A study of thermal depolaiizatioo of poly vinylidene fluoride using x-ray pole-figure obseivatioos. J. Appl. Phys. 59 2345 (1986). 

Wide-angle x-ray pole figures were applied to pol5q)ropylene (64), poly(ethylene terephthalate) (65), and polyethylene film (66,67). 

The power law-type spectral dependencies of x and x" are well supported by our experiments. While the unpoled sample exhibits an exponent ft 0.2 (not shown), i. e. large poly-dispersivity, the poled sample yields ft 0.67 for both components of x (Figure 15.14 [58]). Obviously the polydispersivity is largely suppressed at low domain wall densities. This seems to show that polydispersivity is less affected by the nonlinearity in the creep regime, v oc Es, than by the mutual wall interactions in the nanodomain regime [46], Very satisfactorily, also the Cole-Cole plot, Equation (15.21), which is another independent test of the ansatz, Equation (15.18), reveals a very similar exponent, ft 0.69 (Figure 15.15 [58]). 

Note The exponent in the HN equation is determined by acc and aoc, which are the exponents of the Cole-Cole and the Davidson-Cole functions respectively and the constants in equation 9.02 have been redesignated as (1 - a) =acc and P =aoc)- P is temperature dependent and the values of P are identified as >9= 0 at Tg and y9= 1 at T. The validity of this approach has been verified in a number of materials and a typical example given by Rault (2000) based on the measurements done in PIBMA (Poly isobutylene methacrylate) by Dhinojwala et al.(1992) using the data of the decay of chromophore orientation in a poled film is shown in Figure 9.05. In the region between Tg and T, >9 is found to vary... 

Figure 5. Polar order stability as determined by thermal ramping (rate 37minute) laser frequency fundamental 1.047 //m. (a) film prepared from the poly(amic acid) PAA-5 heated to a maximum temperature of 280°C in the corona field (b) chemically imidized film of PI-5 poled at 310°C (corona field).

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