Influence of the Size Effect on Magnetic Susceptibility in Ultrathin Films

2015 ◽  
Vol 233-234 ◽  
pp. 639-642
Author(s):  
Leonid L. Afremov ◽  
Aleksandr A. Petrov
Keyword(s):  
Experimental Data ◽  
Phase Transition ◽  
Magnetic Susceptibility ◽  
Theoretical Analysis ◽  
Ultrathin Films ◽  
Transition Point ◽  
Finite Size ◽  
Phase Transition Point ◽  
Shape Curve ◽  
Good Agreement

The magnetic susceptibility dependence on temperature near phase transition point was investigated by theoretical analysis. It is shown that with decreasing of the film thickness the magnetic susceptibility shape curve becomes more rounded finite-size function, centered about the lowered temperature Tc (L). The obtained results are in good agreement with experimental data.

VARIATIONAL CALCULATION OF LATTICE SU(N) GAUGE SYSTEMS FOR N=4~6

1998 ◽  
Vol 13 (18) ◽  
pp. 3193-3202
Author(s):  
XITE ZHENG
Keyword(s):  
Phase Transition ◽  
Transition Point ◽  
Variational Calculation ◽  
Phase Transition Point ◽  
Lattice Gauge ◽  
Large N ◽  
Transition Points ◽  
Good Agreement ◽  
Gauge Systems

A variational calculation scheme of SU (N) lattice gauge Wilson models for large but finite N is presented. The order parameter EP and the phase transition points of lattice SU (N) gauge systems for N=4~6 are calculated. The results are in good agreement with Monte Carlo simulations. An extrapolation procedure for determination of the phase transition point in the large N limit is proposed.

THE FINITE-SIZE EFFECT ON THE ENTANGLEMENT OF THE QUANTUM ISING CHAIN

2004 ◽  
Vol 18 (17n19) ◽  
pp. 2564-2568 ◽  
Author(s):  
LIFA ZHANG ◽  
PEIQING TONG
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Spin Chain ◽  
Transition Point ◽  
Nearest Neighbor ◽  
Finite Size ◽  
Phase Transition Point ◽  
Finite Size Effect ◽  
Ising Chain ◽  
Derivatives Of

By using the concurrence, the entanglement of a quantum Ising chain is studied numerically. It is found that there is a gap in the concurrence of the nearest-neighbor spins at the quantum phase transition point for the chain with even spins. The gap disappears as the number of the spins goes to infinite. Except for the critical point, the derivatives of the concurrence display the similar scaling behavior as that of the odd-spin chain.

scholarly journals Распространение поверхностной магнитоупругой волны в ферромагнетике в области ориентационного фазового перехода

2020 ◽  
Vol 62 (6) ◽  
pp. 851
Author(s):  
И.В. Мальцев ◽  
И.В. Бычков ◽  
Д.А. Кузьмин ◽  
В.Г. Шавров
Keyword(s):  
Phase Transition ◽  
Group Velocity ◽  
Yttrium Iron Garnet ◽  
Transition Point ◽  
Phase Transition Point ◽  
Yttrium Iron ◽  
Orientational Phase Transition ◽  
Velocity Changes ◽  
Iron Garnet ◽  
Magnetoelastic Surface

In this paper, we have studied the dependencies of group velocity and damping of magnetoelastic surface waves on the frequency at various external magnetic fields and propagation angles. The group velocity spikes occur at frequencies at which the damping peaks of the surface wave are detected. The behavior of a surface magnetoelastic wave in the vicinity of the orientational phase transition was also investigated. At the phase transition point, the group velocity changes by 1%. Dependences of the damping along the surface at various propagation angles point out on the nonreciprocal nature of the wave. All dependencies in this work were obtained using computer modeling. The parameters of the ferromagnet are taken typical for yttrium-iron garnet.

Dielectric lossbs near the phase transition point in DTGSel crystal

1989 ◽  
Vol 10 (6) ◽  
pp. 167-172
Author(s):  
S. A. Gridnev ◽  
B. N. Prasolov ◽  
O. V. Dybova
Keyword(s):  
Phase Transition ◽  
Transition Point ◽  
Phase Transition Point
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