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G27: Superconductivity:Low_Temp_2

Tue. March 7, 11:30 a.m. – 2:30 p.m. PST

Room 219

Sponsoring Units: DCMPChair: Andrew Woods, Los Alamos National LaboratorySession Type:

    Tue. March 7, 12:30 p.m. – 12:42 p.m. PST

    Room 219

    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.

    Presented By

    • Sunil Ghimire (Iowa State University)

    Authors

    • Sunil Ghimire (Iowa State University)
    • Kamal R Joshi (Iowa State University)
    • Marcin Konczykowski (Ecole Polytechnique)
    • Romain Grasset (Ecole Polytechnique)
    • Shuzhang Chen (State Univ of NY - Stony Brook)
    • Makariy A Tanatar (Ames National Laboratory)
    • Ruslan Prozorov (Ames National Laboratory)
    • Cedomir Petrovic (Brookhaven National Laboratory)