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Effect of 2.5 MeV electron irradiation on vortex dynamics of Ca<sub>3</sub>(Ir,Rh)<sub>4</sub>Sn<sub>13</sub> superconductor

ORAL

Abstract

Zero field London penetration depth, λL(T) and Campbell penetration depth, λC(T) were measured

in both pristine and electron-irradiated samples of single crystals Ca3(Ir,Rh)4Sn13 using a tunnel diode resonator (TDR). The rate of TC suppression and low-temperature London penetration depth were analyzed to understand the superconducting gap structure. The Campbell penetration depth was used to extract true (relaxation-free) critical current density as a function of temperature and magnetic field. The results and the constructed vortex phase diagram are compared between the pristine and irradiated samples, as well as with conventional measurements. The observed peak-effect, induced electron irradiation, implies its static origin and signifies a crossover in the pinning mechanism.

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Presenters

  • Sunil Ghimire

    Iowa State University and Ames Laboratory, Ames National Laboratory, Iowa State University

Authors

  • Sunil Ghimire

    Iowa State University and Ames Laboratory, Ames National Laboratory, Iowa State University

  • Kamal R Joshi

    Ames National Laboratory, Iowa State University

  • Marcin Konczykowski

    Ecole Polytechnique, France, Ecole Polytechnique

  • Romain Grasset

    Ecole Polytechnique

  • Shuzhang Chen

    State Univ of NY - Stony Brook

  • Makariy A Tanatar

    Iowa State University and Ames Laboratory, Ames Laboratory/Iowa State University, Ames National Laboratory

  • Ruslan Prozorov

    Iowa State University and Ames Laboratory, Ames National Laboratory

  • Cedomir Petrovic

    Brookhaven National Laboratory