Measurements of the absolute value of the penetration depth in high-$T_c$ superconductors using a tunnel diode resonator

Abstract

A method is presented to measure the absolute value of the London penetration depth, $\lambda$, from the frequency shift of a resonator. The technique involves coating a high-$T_c$ superconductor (HTSC) with film of low - Tc material of known thickness and penetration depth. The method is applied to measure London penetration depth in YBa2Cu3O{7-δ} (YBCO) Bi2Sr2CaCu2O{8+δ} (BSCCO) and Pr{1.85}Ce{0.15}CuO{4-δ}$(PCCO).ForYBCOandBSCCO,thevaluesof$λ(0)$areinagreementwiththeliteraturevalues.ForPCCO$λ\approx 2790$ Å, reported for the first time.

RevTex 4 (beta 4). 4 pages, 4 EPS figures. Submitted to Appl. Phys. Lett

References in corpus (2)

• Meissner - London state in superconductors of rectangular cross-section in perpendicular magnetic field
• Evidence for nodal quasiparticles in electron-doped cuprates from penetration depth measurements

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