Curie temperatures for a two-component ising ferromagnetic superlattice

We consider magnetic superlattices in which the elementary unit cell is made up of m atomic layers of type A and n layers of type B. Recurrence relations are solved to give compact equations for the Curie temperature of phase transitions for both finite and infinite structures. The effect of the sur...

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Bibliographic Details
Published in:Solid state communications 1998, Vol.105 (3), p.189-193
Main Authors: Sy, H.K., Chen, Feng
Format: Article
Language:English
Subjects:
A. magnetic multilayers
A. surfaces and interfaces
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Interfacial magnetic properties (multilayers, magnetic quantum wells, superlattices, magnetic heterostructures)
Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
Magnetic properties and materials
Magnetic properties of surface, thin films and multilayers
Magnetically ordered materials: other intrinsic properties
Physics
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Summary:We consider magnetic superlattices in which the elementary unit cell is made up of m atomic layers of type A and n layers of type B. Recurrence relations are solved to give compact equations for the Curie temperature of phase transitions for both finite and infinite structures. The effect of the surface constants on the phase transition is investigated. Numerical results are obtained for the dependence of the Curie temperature on the bulk as well as the surface exchanges for typical superlattices. The critical curves for the onset of surface transition are also obtained.
ISSN:0038-1098
1879-2766
DOI:10.1016/S0038-1098(97)10090-4