Upper critical fields of superconductor-antiferromagnet superlattices

Vladimir N. Krivoruchko

doi:10.1117/12.250276

5 July 1996 Upper critical fields of superconductor-antiferromagnet superlattices

Vladimir N. Krivoruchko

Proceedings Volume 2697, Oxide Superconductor Physics and Nano-Engineering II; (1996) https://doi.org/10.1117/12.250276
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

Nucleation of the superconducting phase in proximity coupled superconductor-antiferromagnetic (SC/AF) multilayers is studied theoretically. Assuming that both superconducting and antiferromagnetic metals are dirty the superconducting transition temperature T_c and upper critical fields, H_c2(parallel)(T) and H_{c2(perpendicular})(T), as functions from the systems parameters have been calculated. Comparison of the results for the SC/AF structures and for the SC/ferromagnetic multilayers shows that the values of the T_c H_c2(parallel)(T) and H_{c2(perpendicular})(T) are more sensitive to the ferromagnetic exchange field that to the antiferromagnetic one. The main difference in the values of the critical fields is obtained for the structures formed by thin superconducting layers. The finite effect on the superconducting properties of the multilayers does not depend on the strength of the magnetism only, but on the scattering mechanism of the electrons at the interfaces too. The advantages of the antiferromagnetic interaction for nucleation of the SC phase will be lost if nearly all Cooper pairs are destroyed due to the interface scattering.

Citation Download Citation

Vladimir N. Krivoruchko "Upper critical fields of superconductor-antiferromagnet superlattices", Proc. SPIE 2697, Oxide Superconductor Physics and Nano-Engineering II, (5 July 1996); https://doi.org/10.1117/12.250276

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