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Phase diagrams of ferroelectric thin film with two surface layers

Published online by Cambridge University Press:  04 July 2009

H. Arhchoui ,
Y. El Amraoui ,
D. Mezzane  and
I. Luk'yanchuk
H. Arhchoui*
Affiliation:
Laboratoire de Physique Statistique et Modélisation des Systèmes, Département de Physique, Errachidia, Morocco
Y. El Amraoui
Affiliation:
Laboratoire de Physique Statistique et Modélisation des Systèmes, Département de Physique, Errachidia, Morocco
D. Mezzane
Affiliation:
LMCN, Département de Physique, FSTG Marrakech, Morocco
I. Luk'yanchuk
Affiliation:
Laboratoire de Physique de la Matière Condensée de l'Université de Picardie Jules Verne, 80039 Amiens, France
*
[email protected]
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Abstract

Phase diagram of a ferroelectric thin film with two surface layers is studied in frame of the effective field theory (EFT) of transverse Ising model (TIM). The surface of the system is formed from two layers characterized by the exchange interaction anisotropy $R_s =\frac{J_s }{J}$ and the transverse field $\Omega _{s}$ . The crossover from the ferroelectric phase (FP) to the paraelectric phase (PP) is discussed. The phase diagram of the system is studied in $\big( {\frac{K_B T_c }{J},\frac{\Omega _s }{J}} \big)$ coordinates as function of the thickness parameter L. The special attention is given to the effect of the transverse field $\Omega _{s}$ on the phase transitions.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 48 , Issue 1 , October 2009 , 10503
Copyright
© EDP Sciences, 2009

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