Agreement between local and global measurements of the London penetration depth

Thomas M. Lippman, Beena Kalisky, Hyunsoo Kim, Makariy A. Tanatar, Sergey L. Bud'Ko, Paul C. Canfield, Ruslan Prozorov, Kathryn A. Moler

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Recent measurements of the superconducting penetration depth in Ba(Fe 1-xCox)2As2 appeared to disagree on the magnitude and curvature of Δλab(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 sample. The penetration depth observed by the two techniques is identical with no adjustments. We conclude that any discrepancies arise from differences between samples, either in growth or crystal preparation.

Original languageEnglish
Pages (from-to)91-93
Number of pages3
JournalPhysica C: Superconductivity and its Applications
Volume483
DOIs
StatePublished - 14 Dec 2012

Keywords

  • Iron pnictide superconductors
  • Magnetic penetration depth
  • Pairing symmetry

Fingerprint

Dive into the research topics of 'Agreement between local and global measurements of the London penetration depth'. Together they form a unique fingerprint.

Cite this