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A study of temperature and pressure induced structural and electronic changes in SbCl5 intercalated graphite: Part II. Experimental data for c-axis resistivity

Published online by Cambridge University Press:  31 January 2011

O.E. Andersson
Affiliation:
Department of Experimental Physics, Umeå University, S-90187 Umeå, Sweden
B. Sundqvist
Affiliation:
Department of Experimental Physics, Umeå University, S-90187 Umeå, Sweden
E. McRae
Affiliation:
Université de Nancy I, Laboratoire de Chimie du Solide Minéral, U.R.A. C.N.R.S. 158, Service de Chimie Minérale Appliquée, B. P. 239, 54506 Vandoeuvre-lès-Nancy Cédex, France
J.F. Marêché
Affiliation:
Université de Nancy I, Laboratoire de Chimie du Solide Minéral, U.R.A. C.N.R.S. 158, Service de Chimie Minérale Appliquée, B. P. 239, 54506 Vandoeuvre-lès-Nancy Cédex, France
M. Lelaurain
Affiliation:
Université de Nancy I, Laboratoire de Chimie du Solide Minéral, U.R.A. C.N.R.S. 158, Service de Chimie Minérale Appliquée, B. P. 239, 54506 Vandoeuvre-lès-Nancy Cédex, France
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Abstract

We present experimental data for the c-axis resistivity ρc of stage s = 2, 3, 4, 5, and 8, SbCl5 intercalated graphite, over the temperature range 40 to 300 K and the pressure range 0 to 0.8 GPa (0–8 kbar). For most specimens studied, resistance anomalies are observed below 230 K at atmospheric pressure and at pressures up to 0.5 GPa at 293 K. These anomalies are explained in terms of structural changes from a disordered or partly crystallized in-plane intercalate structure at atmospheric pressure and T > 230 K to an almost completely crystallized structure below this temperature, or at elevated pressures, as discussed in a companion paper. In the crystallized phases ρc is approximately linear in T except for stage 8, for which a nonlinear behavior, with a negative temperature coefficient of resistivity below 200 K, is observed. The results are compared with previously available literature data, and the p-T phase diagram is briefly discussed.

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Copyright
Copyright © Materials Research Society 1992

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