Microwave surface resistance of superconductors with grain boundaries

Yasunori Mawatari

doi:10.1103/PhysRevB.71.064507

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Microwave surface resistance of superconductors with grain boundaries

Yasunori Mawatari

DOI 10.1103/PhysRevB.71.064507 · Physical Review B

T1

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Abstract

Microwave-field distribution, dissipation, and surface impedance are theoretically investigated for superconductors with laminar grain boundaries (GBs). In the present theory we adopt the two-fluid model for intragrain transport current in the grains, and the Josephson-junction model for intergrain tunneling current across GBs. Results show that the surface resistance Rs nonmonotonically depends on the critical current density Jcj at GB junctions, and Rs for superconductors with GBs can be smaller than the surface resistance Rs0 for ideal homogeneous superconductors without GBs.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown