Dielectric measurements of new antiferroelectric liquid crystals

• Autorzy: Perkowski, P. , Ogrodnik, K. , Łada, D. , Piecek, W. , Rutkowska, J. , Raszewski, Z. , Żurowska, M. , Dąbrowski, R. , Sun, X.
• Konferencja: Thw 17th Conference on Liquid Crystals : Chemistry Physics and Applications ; (17 ; 09.2007 ; Augustów, Poland)
• Języki publikacji: EN

Abstrakty

EN

Three new pure antiferroelectric materials, synthesized at the Military University of Technology (MUT), were investigated by dielectric means. Clear relaxation modes were detected, i.e., Soft, Goldstone, low frequency in-phase (PL) as well high frequency anti-phase (PH) modes for paraelectric Sm A* phase, ferroelectric Sm C* phase and antiferroelectric Sm CA* phase, respectively. Additionally, a high relaxation mode in Sm CA* was found. The relaxation frequencies fR of the observed modes were calculated from Cole-Cole diagrams.

Słowa kluczowe

EN

relaxation modes; antiferroelectric liquid crystals; dielectric permittivity

• Czasopismo: Opto-Electronics Review
• Rocznik: 2008
• Tom: Vol. 16, No. 3
• Strony: 277-280
• Opis fizyczny: Bibliogr. 4 poz., wykr.

Twórcy

autor

Perkowski, P.

autor

Ogrodnik, K.

autor

Łada, D.

autor

Piecek, W.

autor

Rutkowska, J.

autor

Raszewski, Z.

autor

Żurowska, M.

autor

Dąbrowski, R.

autor

Sun, X.

• Institute of Applied Physics, Military University of Technology, 2 Kaliskiego Str., 00-908 Warsaw, Poland,

Bibliografia

• 1. J. Rutkowska, P. Perkowski, W. Piecek, J. Kędzierski, Z. Raszewski, J. Zieliski, “Dielectric spectroscopy of the fluorinated AFLC's and their protonated analogs”, Ferroelectrics 343, 151-160 (2006).
• 2. S.T. Lagerwall, Ferroelectric and Antiferroelectric Liquid Crystals, Wiley-VCH, 1999.
• 3. W. Haase and S. Wróbel, Relaxation Phenomena, Springer-Verlag, 2003.
• 4. P. Perkowski, W. Piecek, Z. Raszewski, K. Ogrodnik, J. Rutkowska, P. Kula, R. Dąbrowski, J. Kędzierski, and X. Sun, “New high frequency dielectric mode in fluorinated antiferroelecteric liquid crystals”, Ferroelectrics 365, 1-7 (2008).