scholarly journals Mean-field theory of the spin-Peierls state under magnetic field: Application toCuGeO3

1996 ◽  
Vol 53 (9) ◽  
pp. 5090-5093 ◽  
Author(s):  
Mohamed Azzouz ◽  
Claude Bourbonnais
Keyword(s):  
Magnetic Field ◽  
Field Theory ◽  
Mean Field Theory ◽  
Mean Field ◽  
Field Application ◽  
Magnetic Field Application

3d Ising Spin-Glasses in a Magnetic Field and Mean-Field Theory

1990 ◽  
Vol 11 (8) ◽  
pp. 783-789 ◽  
Author(s):  
S Caracciolo ◽  
G Parisi ◽  
S Patarnello ◽  
N Sourlas
Keyword(s):  
Magnetic Field ◽  
Field Theory ◽  
Spin Glasses ◽  
Mean Field Theory ◽  
Mean Field ◽  
Ising Spin

scholarly journals The dynamic magnetic behaviors of the Blume–Capel Ising bilayer system

2015 ◽  
Vol 29 (35n36) ◽  
pp. 1550236 ◽  
Author(s):  
Mehmet Ertaş
Keyword(s):  
Magnetic Field ◽  
Field Theory ◽  
Stochastic Dynamics ◽  
Mean Field Theory ◽  
Mean Field ◽  
Dynamic Equations ◽  
Square Lattice ◽  
Bilayer System ◽  
Dynamic Phase ◽  
Time Dependencies

The dynamic magnetic behaviors of the spin-1 Blume–Capel Ising bilayer system (BCIS) are studied in an oscillating external magnetic field on a two-layer square lattice by utilizing the mean field theory (MFT) based on Glauber-type stochastic dynamics [dynamic mean field theory (DMFT)]. The dynamic equations describing the time-dependencies of the average magnetizations are obtained with the Master equation. The dynamic phases in this system are found by solving these dynamic equations. The temperature dependence of the dynamic order parameters is examined to characterize the nature (continuous or discontinuous) of the phase transitions and to obtain the dynamic phase transition (DPT) points. The dynamic phase diagrams (DPDs) are shown for ferromagnetic/ferromagnetic, antiferromagnetic/ferromagnetic, antiferromagnetic/antiferromagnetic interactions in the plane of the reduced temperature versus magnetic field amplitude and they display dynamic tricritical and re-entrant behavior as well as the dynamic triple point (tp).

scholarly journals Spin Chain in Magnetic Field: Limitations of the Large-N Mean-Field Theory

2015 ◽  
Vol 127 (2) ◽  
pp. 201-203
Author(s):  
K. Wohlfeld ◽  
Cheng-Chien Chen ◽  
M. van Veenendaal ◽  
T.P. Devereaux
Keyword(s):  
Magnetic Field ◽  
Field Theory ◽  
Spin Chain ◽  
Mean Field Theory ◽  
Mean Field ◽  
Large N
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