Agreement between local and global measurements of the London penetration depth

TitleAgreement between local and global measurements of the London penetration depth
Publication TypeJournal Article
Year of Publication2012
AuthorsLippman TM, Kalisky B, Kim H, Tanatar MA, Bud'ko SL, Canfield PC, Prozorov R, Moler KA
Journal TitlePhysica C-Superconductivity and Its Applications
Volume483
Pages91-93
Date Published12
Type of ArticleArticle
ISBN Number0921-4534
Accession NumberWOS:000311348800020
KeywordsIron pnictide, magnetic penetration depth, pairing symmetry, superconductors
Abstract

Recent measurements of the superconducting penetration depth in Ba(Fe1-xCox)(2)As-2 appeared to disagree on the magnitude and curvature of Delta lambda(ab)(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. (C) 2012 Elsevier B.V. All rights reserved.

URL<Go to ISI>://WOS:000311348800020
DOI10.1016/j.physc.2012.08.001
Alternate JournalPhysica C