Zhao, Liang L.Lausberg, StefanKim, H.Tanatar, M.A.Brando, ManuelProzorov, R.Morosan, E.2013-03-142013-03-142012Zhao, Liang L., Lausberg, Stefan, Kim, H., et al.. "Type-I superconductivity in YbSb2 single crystals." <i>Physical Review B,</i> 85, (2012) American Physical Society: 214526. http://dx.doi.org/10.1103/PhysRevB.85.214526.https://hdl.handle.net/1911/70633We 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 Tc ≈ 1.3 K and Hc ≈ 55 Oe. A small Ginzburg-Landau parameter κ = 0.05, together with typical magnetization isotherms of type-I superconductors, small critical field values, a strong differential paramagnetic effect signal, and a fieldinduced 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 (2) c ≈ 0.41 K and H(2) c ≈ 430 Oe.engArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Journal articlehttp://dx.doi.org/10.1103/PhysRevB.85.214526