Abstract
The formation of the superconducting phase in short-period proximity-effect layered superlattices of the superconductor-band-antiferromagnetic-metal (SC/AF) type is studied. The exact solution of the Usadel equations is used to discuss the possibility of formation in such structures of a ground state in which the order parameters of the adjacent superconducting layers have opposite signs (the “π-phase”). The dependence of the superconducting transition temperature and the upper critical field normal to the layers on the lattice period, the intensity of magnetic interaction in the antiferromagnetic layer, and the state of the interface between the layers is examined. It is found that there exists a nonlinear dependence of the conditions for the appearance of the superconducting state in a layered SC/AF system on the system’s parameters. Finally, the conditions for the appearance of the superconducting phase in proximity-effect superlattices consisting of a superconductor with nonmagnetic, ferromagnetic, and antiferromagnetic metals are compared.
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Zh. Éksp. Teor. Fiz. 111, 547–561 (February 1997)
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Krivoruchko, V.N. The phase diagram of the superconducting state of superconductor-band-antiferromagnet superlattices. J. Exp. Theor. Phys. 84, 300–308 (1997). https://doi.org/10.1134/1.558117
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DOI: https://doi.org/10.1134/1.558117