Thermal properties of glycine phosphite across ferroelectric phase transition: A photopyroelectric study

Menon, Preethy C and Philip, J and Deepthy, A and Bhat, HL (2001) Thermal properties of glycine phosphite across ferroelectric phase transition: A photopyroelectric study. In: Materials Research Bulletin, 36 (13-14). pp. 2407-2414.

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Abstract

A photopyroelectric measurement of the thermal parameters of glycine phosphite (GPI) single crystals across the ferroelectric phase transition temperature has been carried out. The thermal parameters—thermal diffusivity $(\alpha)$, thermal effusivity (e), thermal conductivity (K), and heat capacity $(c_p)$-of GPI single crystals are reported. The para-ferroelectric phase transition is reflected in these thermal parameters as anomalies at the transition point. The anisotropy in thermal wave propagation is established by measuring thermal conductivity along the a, b, and c crystal axes. The anomalous variations in the thermal parameters across the phase transition temperature reveal an order–disorder type transition at 224 K in this crystal.

Item Type:	Journal Article
Publication:	Materials Research Bulletin
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Keywords:	Organic compounds;Crystal growth;Phase transitions;Specific heat;Thermal conductivity.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	19 Sep 2008 09:03
Last Modified:	19 Sep 2010 04:49
URI:	http://eprints.iisc.ac.in/id/eprint/15867

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