Simultaneous photoacoustic measurements of specific heat and thermal conductivity critical behaviour at a smectic A–nematic phase transition |
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Authors: | U Zammit M Marinelli R Pizzoferrato F Scudieri S Martellucci |
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Institution: | Dipartimento Ingegneria Meccanica , 2° Università di Roma , Tor Vergata, Via O. Raimondo, 00173 , Roma , Italy |
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Abstract: | Abstract Simultaneous measurements of the thermal conductivity and specific heat at the smectic A-nematic phase transition in 4-n-octyl-4′-cyanobiphenyl (8CB) have been carried out with the photoacoustic technique. A critical increase in the thermal conductivity is reported. A critical decrease in the thermal diffusivity data confirms that the transition in 8CB is fluctuation dominated as also shown by the critical behaviour of the specific heat. |
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