Spontaneous vortex phase in a superconducting weak ferromagnet

E. B. Sonin; I. Felner

doi:10.1103/PhysRevB.57.R14000

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Spontaneous vortex phase in a superconducting weak ferromagnet

E. B. Sonin, I. Felner

DOI 10.1103/PhysRevB.57.R14000 · Physical Review B

T1

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Abstract

In high-Tc superconducting compounds R1.5Ce0.5RuSr2Cu2O10 the onset of superconductivity occurs at a temperature Tc much lower than the temperature of the phase transition to weak ferromagnetism, and the diamagnetic response arises at the temperature Td, which is much lower than Tc. The present paper contains experimental data and a theoretical analysis of this phenomenon. These results collectively show convincingly that between Tc and Td vortices are present in the sample in equilibrium without an external magnetic field (the spontaneous vortex phase).

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
R1.5Ce0.5RuSr2Cu2O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	33	Pressure not reported	onset
R1.5Ce0.5RuSr2Cu2O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	33	Pressure not reported	onset
ErNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown