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The magnetic properties of a transverse Ising thin film are investigated by the use of the two theoretical frameworks, namely the standard mean-field theory and the effective field theory better than the mean-field theory. Some new aspects of the magnetic properties have been clarified firstly...
Persistent link: https://www.econbiz.de/10010590697
The mixed spin- 1/2 and spin- 3/2 transverse Ising model in a longitudinal magnetic field is studied within the framework of the effective-field theory with correlations. In this approach the effective-field equations are derived by using a probability distribution method based on the...
Persistent link: https://www.econbiz.de/10010873853
The pyroelectric properties and the Curie temperature of a ferroelectric/ferroelectric superlattice with two alternative layers are studied for the transverse Ising model using the effective field theory with a probability distribution technique. The pyroelectric coefficient of bulk materials...
Persistent link: https://www.econbiz.de/10010874090
We examine the critical behavior of a finite alternating ferromagnetic superlattice based on the transverse Ising model. By the use of the transfer matrix method, we derive a nonlinear equation for the phase transition temperature of the superlattice. The critical temperature of the alternating...
Persistent link: https://www.econbiz.de/10010874305
The dynamics of one-dimensional quantum spin systems has been a long standing theoretical and experimental problem. Among them, the transverse Ising model with multi-spin interactions, regarded as one of the simplest with non-trivial dynamics, has attracted considerable interest in recent years....
Persistent link: https://www.econbiz.de/10010872391
The phase diagrams of a superlattice composed from two different alternating ferroelectric slabs with the same thickness L are discussed on the basis of the spin-1/2 transverse Ising model. The two theoretical frameworks of the differential operator technique are applied to the investigations,...
Persistent link: https://www.econbiz.de/10010588594
The phase diagrams (transition temperature and compensation temperature) and magnetizations of a cylindrical nanowire with a (positive or negative) core–shell interaction and a surface dilution, described by the transverse Ising model (TIM), are investigated by the use of the effective-field...
Persistent link: https://www.econbiz.de/10010590121
The phase diagram of a ferroelectric thin film described by the transverse Ising model is discussed by the use of the standard mean field approximation and other approximations better than the mean field approximation. Some characteristic features have been observed in the results of mean field...
Persistent link: https://www.econbiz.de/10010591023
The temperature dependence of the longitudinal magnetization as well as the longitudinal susceptibility of a ferroelectric superlattice described by a transverse spin-12 Ising model are studied using the effective field theory with a probability distribution technique that accounts for the...
Persistent link: https://www.econbiz.de/10010591727
Critical properties (transition temperature and critical transverse field) of a spin-12 Ising superlattice in transverse fields consisting of alternating two different slabs with same thickness L are investigated by the use of the effective-field theory. When the transverse field and the...
Persistent link: https://www.econbiz.de/10011059429