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Original Articles

Static periodic distortion above bend Freedericksz transition in nematics

Pages 185-201 | Received 29 Jun 1989, Accepted 25 Jul 1989, Published online: 24 Sep 2006

References

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  • Lonberg , F. and Meyer , R. B. 1985 . Phys. Rev. Lett. , 55 : 718 (To distinguish clearly between the two kinds of distortions, they are referred to differently. SP stands for the stripe phase which appears above a threshold lower than the homogeneous deformation threshold. PD refers to the periodic distortion which occurs above a threshold lower than the homogeneous deformation threshold.)
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  • It is generally found that for most material parameters the lowest solution H1 = HSP corresponds to Q2 y real but negative. As Qy also must be real and hence as Q2 y must be positive, one has to look for the next higher solution H2 < H1 for which (3.1) is again satisfied. This is found to yield a positive Q2 y from which Qy is calculated. H2 is taken as the SP threshold. H2 compares well with HSP found from the exact solution; Qy found from the approximate calculation is generally slightly higher than Q determined from the exact method.
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