First-order phase transitions in ferromagnet/superconductor layered structures
Paul H. Barsic, Oriol T. Valls, Klaus Halterman
DOI 10.1103/PhysRevB.73.144514 · Physical Review B
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Abstract
We study the thermodynamics of clean structures composed of superconductor (S) and ferromagnet (F) layers and consisting of one or more SFS junctions. We use fully self-consistent numerical methods to compute the condensation free energies of the possible order parameter configurations as a function of temperature T. As T varies, we find that there are phase transitions between states characterized by different junction configurations (denoted as “0” or “π” according to the phase difference of the order parameter in consecutive S layers). We show that these transitions are of first order. We calculate the associated latent heats and find them to be measurable.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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