Type-I superconductivity in YbSb2 single crystals

TitleType-I superconductivity in YbSb2 single crystals
Publication TypeJournal Article
Year of Publication2012
AuthorsZhao LL, Lausberg S, Kim H, Tanatar MA, Brando M, Prozorov R, Morosan E
Journal TitlePhysical Review B
Volume85
Pages214526
Date Published09
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000305604600006
Keywordstransition
Abstract

We present evidence of type-I superconductivity in YbSb2 single crystals from dc and ac magnetization, heat capacity, and resistivity measurements. The critical temperature and critical field are determined to be T-c approximate to 1.3 K and H-c approximate to 55 Oe. A small Ginzburg-Landau parameter kappa = 0.05, together with typical magnetization isotherms of type-I superconductors, small critical field values, a strong differential paramagnetic effect signal, and a field-induced change from second- to first-order phase transition, confirms the type-I nature of the superconductivity in YbSb2. A possible second superconducting state is observed in the radio-frequency susceptibility measurements, with T-c((2)) approximate to 0.41 K and H-c((2)) approximate to 430 Oe.

URL<Go to ISI>://WOS:000305604600006
DOI10.1103/PhysRevB.85.214526
Alternate JournalPhys. Rev. B