Novel features in the flux-flow resistivity of the heavy fermion superconductor PrOs${}_4$Sb${}_{12}$

Abstract

We have investigated the electrical resistivity of the heavy fermion superconductor PrOs${}_4$Sb${}_{12}$ in the mixed state. We found unusual double minima in the flux-flow resistivity as a function of magnetic field below the upper critical field for the first time, indicating double peaks in the pinning force density ($F_{\mathrm{P}}$). Estimated $F_{\mathrm{P}}$ at the peak exhibits apparent dependence on applied field direction; composed of two-fold and four-fold symmetries mimicking the reported angular dependence of thermal conductivity ($\kappa$). The result is discussed in correlation with the double step superconducting (SC) transition in the specific heat and the multiple SC-phases inferred from the angular dependence of $\kappa$.

5 pages, 7 figures, to appear in J. Phys. Soc. Jpn. Vol. 74, No. 6 or 7

References in corpus (9)

• Time-Reversal Symmetry-Breaking Superconductivity in Heavy Fermion PrOs4Sb12 detected by Muon Spin Relaxation
• Multiple Superconducting Phases in New Heavy Fermion Superconductor PrOs4Sb12
• Thermodynamical Study on the Heavy-Fermion Superconductor PrOs4Sb12: Evidence for Field-Induced Phase Transition
• Evidence for Unconventional Strong-coupling Superconductivity in PrOs_4Sb_12 : An Sb Nuclear Quadrupole Resonance (NQR) Study
• Low temperature specific heat of the heavy fermion superconductor PrOs${}_4$Sb${}_{12}$
• Fermi surface of the heavy fermion superconductor PrOs${}_4$Sb${}_{12}$
• Probing the superconducting gap symmetry of PrOs${}_4$Sb${}_{12}$: A penetration depth study
• Superconducting phase diagram of the filled skuterrudite PrOs4Sb12
• High magnetic field phase diagram of PrOs4Sb12

Cited by in corpus (2)

• Double superconducting transition in the filled skutterudite PrOs4Sb12 and sample characterizations
• Evolution in the split-peak structure across the Peak Effect region in single crystals of $2H$-NbSe${}_2$