Magnetic-field tuned anisotropy in superconducting Rb(x)Fe(2-y)Se(2)

Abstract

The anisotropic superconducting properties of a Rb(x)Fe(2-y)Se(2) single crystal with transition temperature 32 K were investigated by means of SQUID and torque magnetometry, probing the effective magnetic penetration depth and the magnetic penetration depth anisotropy. Interestingly, the anisotropy is found to be temperature independent in the superconducting state, but strongly field dependent. This unusual anisotropic behavior, together with a large zero-temperature effective magnetic penetration depth is possibly related to a superconducting state heavily biased by the coexisting antiferromagnetic phase.

6 pages, accepted in Physical Review B

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Cited by in corpus (4)

• A review of two-band superconductivity: materials and effects on the thermodynamic and reversible mixed-state properties
• Superconducting properties of single-crystalline A_{x}Fe_{2-y}Se_{2} (A=Rb, K) studied using muon spin spectroscopy
• Intrinsic crystal phase separation in antiferromagnetic superconductor RbyFe2-xSe2: a diffraction study
• Superconductivity and magnetism in RbxFe2-ySe2: Impact of thermal treatment on mesoscopic phase separation