Superconducting and magnetic properties of Sr3Ir4Sn13

Abstract

Magnetization and muon spin relaxation or rotation (muSR) measurements have been performed to study the superconducting and magnetic properties of Sr3Ir4Sn13. From magnetization measurements the lower and upper critical fields of Sr3Ir4Sn13 are found to be 81(1) Oe and 14.4(2) kOe, respectively. Zero-field muSR data show no sign of any magnetic ordering or weak magnetism in Sr3Ir4Sn13. Transverse-field muSR measurements in the vortex state provided the temperature dependence of the magnetic penetration depth. The dependence of penetration depth with temperature is consistent with the existence of single s-wave energy gap in the superconducting state of Sr3Ir4Sn13 with a gap value of 0.82(2) meV at absolute zero temperature. The magnetic penetration depth at zero temperature is 291(3) nm. The gap to Tc ratio is 2.1(1), indicates that Sr3Ir4Sn13 should be considered as a strong-coupling superconductor.

6 pages, 5 figures

References in corpus (2)

• Magnetic Penetration Depth in Unconventional Superconductors
• Comparison of different methods for analyzing $\mu$SR line shapes in the vortex state of type-II superconductors

Cited by in corpus (9)

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• Peak in the critical current density in (Ca${}_x$Sr${}_{1-x}$)${}_3$Rh${}_4$Sn${}_{13}$ tuned towards the structural quantum critical point
• Interplay between charge density wave and superconductivity in multi-band systems with inter-band Coulomb interaction
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• Superconductivity with high upper critical field in Ta-Hf Alloys
• Incommensurate charge density wave on multiband intermetallic systems exhibiting competing orders