The structure of frustrated smectic phases exhibited by binary mixtures of 4-n-octyloxyphenyl-4'-cyanobenzoyloxybenzoate (DB8OCN) and 4-n-octyloxybenzoate-4'-cyanoazobenzene (8OBCAB) have been studied by high-resolution x-ray diffraction. This system was previously reported to exhibit three incommensurate smectic-A phases. These incommensurate smectic A(i1) A(i2), and the soliton A(i2) phases are found to be coexistences of A(d) and A1; A(d) and A2; and A(d), A1, and A2 phases, respectively. As of now, there are no known incommensurate smectic-A phases.
Physical Review Letters
Copyright 1992 American Physical Society. Available on publisher's site.
Patel, Prem; Keast, S. Sabol; Neubert, Mary E.; Kumar, Satyendra (1992). Nonexistence of Incommensurate Smectic-A Phases in Binary-Mixtures of 8Obcab and Db8Ocn. Physical Review Letters 69(2) 301-304. doi: 10.1103/PhysRevLett.69.301. Retrieved from https://oaks.kent.edu/phypubs/47