Gamma-induced augmentation in EBHA: a dielectric and electro-optical study

The gamma irradiation technique has been used to alter the dielectric and electro-optical properties of a liquid crystal material. The present paper reports a comparative study of dielectric and electro-optical properties of unirradiated EBHA nematic liquid crystal (NLC) with gamma-irradiated EBHA NLC. The dielectric measurement has been performed with variation in voltage and temperature within the frequency range 100 Hz-10 MHz. Variations in response time for both gamma- irradiated and unirradiated samples have also been measured and are well explained in the present paper. PACS Nos.: 77.84.Nh, 78.20.Ci, 77.22.Gm, 76.80.+y, 78.20.Jq. Nous soumettons un cristal liquide a une irradiation gamma, afin de modifier ses proprietes dielectriques et electrooptiques. Nous comparons ici les proprietes dielectriques et electro-optiques d'un cristal liquide nematique (NLC) EBHA non irradie avec celles d'un NLC EBHA irradie. Les mesures dielectriques sont faites avec variation de voltage et de temperature dans le domaine de 100 Hz a 10 MHz. Nous mesurons et expliquons egalement les variations dans le temps de reponse pour les deux echantillons, irradie et non irradie. [Traduit par la Redaction]
1. Introduction The modification in dielectric and electro-optical properties of liquid crystal (LC) caused by ion beam radiation is a new field of research. Ionizing particles like electrons, photons, and [...]