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Effect Of Mosaicity In X-Ray Studies Of Critical Behavior At The Nematic To Smectic-A Transition, Andrew Primak, Michael Fisch, Satyendra Kumar
Effect Of Mosaicity In X-Ray Studies Of Critical Behavior At The Nematic To Smectic-A Transition, Andrew Primak, Michael Fisch, Satyendra Kumar
Satyendra Kumar
Previous studies of critical behavior at the nematic to smectic-A transition by high-resolution x-ray scattering were performed using low magnetic fields of 0.1-0.8 T. In those studies, the transverse resolution was limited by the sample mosaicity which complicated data analysis. In order to understand the effect of sample mosaicity on the measured values of critical exponents, the divergence of the smectic order correlation lengths xi(parallel to,perpendicular to) and susceptibility sigma(o) was studied in a magnetic field ranging from 0.25 to 5 T. The use of high (5 T) field reduced the sample mosaicity and improved the effective transverse resolution by …