Decoupling of superconducting layers in the magnetic superconductor RuSr2GdCu2O8

Manuel Houzet; Alexandre Buzdin; Miodrag L. Kulić

doi:10.1103/PhysRevB.64.184501

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Decoupling of superconducting layers in the magnetic superconductor RuSr2GdCu2O8

Manuel Houzet, Alexandre Buzdin, Miodrag L. Kulić

DOI 10.1103/PhysRevB.64.184501 · Physical Review B

T1

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Abstract

We propose the model for magnetic properties of the magnetic superconductor RuSr2GdCu2O8, that incorporates the theory of the superconducting/ferromagnetic multilayers. The transition line Td(h), on which the Josephson coupled superconducting planes are decoupled, i.e., jc(Td)=0, is calculated as a function of the exchange energy h. As the result of this decoupling a nonmonotonic behavior of magnetic properties, such as the lower critical field Hc1, Josephson plasma frequency, etc., is realized near (or by crossing) the Td(h) line. The obtained results are used in analyzing the newly discovered antiferromagnetic ruthenocuprate RuSr2GdCu2O8 with possible weak ferromagnetic order in the RuO2 planes.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
RuSr2GdCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	35	Pressure not reported	onset
Ru1-xSr2GdCu2-xO8-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	72	Pressure not reported	unknown
AuIn2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.207	Pressure not reported	unknown