Upper critical field, penetration depth, and depinning frequency of the high-temperature superconductor LaFeAsO0.9F0.1 studied by microwave surface impedance

A. Narduzzo; M. S. Grbić; M. Požek; A. Dulčić; D. Paar; A. Kondrat; C. Hess; I. Hellmann; R. Klingeler; J. Werner; A. Köhler; G. Behr; B. Büchner

doi:10.1103/PhysRevB.78.012507

Upper critical field, penetration depth, and depinning frequency of the high-temperature superconductor LaFeAsO0.9F0.1 studied by microwave surface impedance

A. Narduzzo, M. S. Grbić, M. Požek, A. Dulčić, D. Paar, A. Kondrat, C. Hess, I. Hellmann, R. Klingeler, J. Werner, A. Köhler, G. Behr, B. Büchner

DOI 10.1103/PhysRevB.78.012507 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

Temperature-dependent and magnetic-field-dependent measurements of the microwave surface impedance of superconducting LaFeAsO0.9F0.1 (Tc≈26 K) reveal a very large upper critical field (Bc2≈56 T) and a large value of the depinning frequency (f0≈6 GHz); together with an upper limit for the effective London penetration depth, λeff≤200 nm, our results indicate a strong similarity between this system and the high-Tc superconducting cuprates.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
LaFeAsO0.9F0.1 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	23.7	Pressure not reported	midpoint
LaFeAsO0.9F0.1 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	22	Pressure not reported	onset
SmO0.8F0.2FeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	55	Pressure not reported	unknown