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Electron paramagnetic resonance study of alinement induced by magnetic fields in two smectic-a liquid crystals not exhibiting nematic phases
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Gelerinter, E. Fryburg, G. C. |
| Copyright Year | 1972 |
| Description | Using vanadyl acetylacetonate (VAAC) as a paramagnetic probe, the molecular ordering in two smectic-A liquid crystals that do not display nematic phases were studied. Reproducible alinement was attained by slow cooling throughout the isotropic smectic-A transition in dc magnetic fields of 1.1 and 2.15 teslas. The degree of order attained is small for a smectic-A liquid crystal. Measurements were made of the variation of the average hyperfine splitting of the alined samples as a function of orientation relative to the dc magnetic field of the spectrometer. This functional dependence is in agreement with the theoretical prediction except where the viscosity of the liquid crystal becomes large enough to slow the tumbling of the VAAC, as indicated by asymmetry in the end lines of the spectrum. |
| File Size | 506428 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19730004836 |
| Archival Resource Key | ark:/13960/t76t5f57r |
| Language | English |
| Publisher Date | 1972-12-01 |
| Access Restriction | Open |
| Subject Keyword | Materials, Nonmetallic Hyperfine Structure Alignment Direct Current Molecular Interactions Electron Paramagnetic Resonance Magnetic Fields Liquid Crystals Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
