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Physics  2000 

Phase Transitions in Confined Antiferromagnets

DOI: 10.1002/1521-3951(200007)220:1<389::AID-PSSB389>3.3.CO;2-P

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Confinement effects on the phase transitions in antiferromagnets are studied as a function of the surface coupling v and the surface field h for bcc(110) films. Unusual topologies for the phase diagram are attained for particular combinations of v and h. It is shown that some of the characteristics of the finite-temperature behavior of the system are driven by its low-temperature properties and consequently can be explained in terms of a ground-state analysis. Cluster variation free energies are used for the investigation of the finite temperature behavior.


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