Electrical properties in disk-like phenylene derivative in crystalline state

We investigated electrical properties of disk-like phenylene derivatives embedded with dipoles (N,N',N"-tri-n-octyl-1,3,5-benzenetricarboxamide TOB)). Our experimental results revealed that TOB exhibited ferroelectric and pyroelectric properties in a crystalline state. Remnant displacement and coercive field were 10.5 MC/m(2) and 14 MV/m, respectively, at 293 K by displacement-field hysteresis loop. Dielectric anomaly, associated with ferroelectric-paraelectric phase transition, was observed at 370 K. The pyroelectric signal of about beta = 3.1 muC/M-2 K was recorded at temperatures below the phase transition point. (C) 2004 Elsevier B.V. All rights reserved.