Nearly isotropic upper critical fields in a SrFe1.85Co0.15As2 single crystal

作者：Khim Seunghyun; Kim Jun Sung; Kim Jae Wook; Lee Suk Ho; Balakirev F F; Bang Yunkyu; Kim Kee Hoon^*

来源：Physica C-Superconductivity and Its Applications, 2010, 470: S317-S319.

DOI：10.1016/j.physc.2009.11.060

• Superconductivity
• Iron-pnictides
• Upper critical field

We study temperature dependent upper critical field H-c2 of a SrFe1.85Co0.15As2 single crystal (T-c = 20.2 K) along ab-plane and c-axis through resistivity measurements up to 50 T. For the both crystalline directions, H-c2 becomes nearly isotropic at zero temperature limit, reaching similar to 48 T. The temperature dependence of the H-c2 curves is explained by interplay between orbital and Pauli limiting behaviors combined with the two band effects.

• 出版日期2010-12