London Penetration Depth Measurements Using Tunnel Diode Resonators

Agreement between local and global measurements of the London penetration depth

Recent measurements of the superconducting penetration depth in Ba(Fe1 xCox)2As2 appeared to disagree on the magnitude and curvature of Dkab(T), even near optimal doping. These measurements were carried out on different samples grown by different groups. To understand the discrepancy, we use scanning SQUID susceptometry and a tunnel diode resonator to measure the penetration depth in a single s...

Comment on ”Precision global measurements of London penetration depth in FeTe0.58Se0.42”

Magnetic Penetration Depth Measurements in Cuprate Superconductors

We examine recent results on measurements of the magnetic penetration depth in cuprate superconductors, with particular emphasis on our results obtained with the microstrip and parallel-plate resonator techniques. The results show that the magnetic penetration depth temperature dependence in YBa2Cu307-a is not consistent with a simple scaled weak-coupled BCS temperature dependence. We present t...

Direct measurement of the London penetration depth in YBa2Cu3O6.92 using low-energy μSR

R. F. Kiefl, 2, 3 M. D. Hossain, 2 B. M. Wojek, 5 S. R. Dunsiger, G. D. Morris, T. Prokscha, Z. Salman, J. Baglo, D. A. Bonn, 3 R. Liang, 3 W. N. Hardy, 3 A. Suter, and E. Morenzoni Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, Canada V6T 1Z1 TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, Canada, V6T 2A3 Canadian Institute for Advanced Research, Canada Paul Sch...

Uncertainty in multiple penetration depth fringing electric field sensor measurements

Measurement of multilayer material properties with fringing electric field dielectrometry sensors requires the processing of terminal admittance data from multiple electrode pairs. The choice of the algorithmic approach for data analysis is critical because of a high sensitivity to small measurement uncertainties. While individual channel uncertainties are usually within a reasonable instrument...