Pyroelectricity of Noncentrosymmetric Langmuir-Blodgett Films of Phenylpyrazine Derivatives T. Kamata, J. Umemura, T. Takenaka, N. Koizumi, K. Takehara, K. Isomura, and H. Taniguchi [Jpn. J. Appl. Phys., Vol.33, Part1, No.2, pp.1074-1078, 1994]