Critical behavior in magnetic superlattices
Journal of Magnetism and Magnetic Materials(1991)
摘要
Based on the effective field theory with correlations, the critical behavior of a magnetic superlattice consisting of two different ferromagnets is examined. A simple cubic Ising model with nearest-neighbor coupling is assumed. It is found that there exists a critical value of the interface exchange coupling above which the interface magnetism appears. The critical temperature of the superlattice is studied as a function of the thickness of the constituents in a unit cell and of the exchange coupling energies in each material. A phase diagram is also given.
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关键词
critical temperature,superlattices,phase diagrams,magnetic properties,magnetic field,behavior,simple cubic,interfaces,ising model,nearest neighbor,critical value,effective field theory,field theory,magnetic fields,energy,phase diagram,ferromagnetism,crystal lattices
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