Calculation of the Specific Heats for the II-III and II-IV Phase Transitions in NH<suB>4</suB>I

Chin. Phys. Lett.

2003, Vol. 20

Issue (1): 35-38 DOI:

Original Articles

Calculation of the Specific Heats for the II-III and II-IV Phase Transitions in NH₄I

H. Yurtseven;H. Kaya

Department of Physics, Istanbul Technical University, Maslak, Istanbul, Turkey

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H. Yurtseven, H. Kaya 2003 Chin. Phys. Lett. 20 35-38

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Abstract This study gives our calculation for the specific heats C_VI due to an Ising model using the observed C_p data for the II-III and II-IV phase transitions in NH₄I. By fitting to the C_p data we determine the values of the critical exponent for the pressure of 0.14 GPa (II-III phase transition) and for the pressures of 0.75, 1.35 and 1.97 GPa (II-IV phase transition) in NH₄I. Our exponent values are close to the predicted values of the specific heat in a three-dimensional Ising model. Our calculated C_VI are in good agreement with the experimental C_p for NH₄I in most cases.

Keywords: 05.70.Fh 64.60.-i 64.70.Kb

Published: 01 January 2003

PACS:	05.70.Fh	(Phase transitions: general studies)
	64.60.-i	(General studies of phase transitions)
	64.70.Kb

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2003/V20/I1/035

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