Anisotropy of the superconducting upper critical field and antiferromagnetism in pressure-induced superconductor CePt2In7
Anisotropy of the superconducting upper critical field and antiferromagnetism in pressure-induced superconductor CePt2In7
复制标题
DOI：
10.1088/1742-6596/592/1/012006
复制
发表时间：
2015-03
期刊：
影响因子：
--
通讯作者：
S. Kurahashi;Shunpei Ota;S. Tomaru;Y. Hirose;R. Settai
中科院分区：
文献类型：
--
作者：
S. Kurahashi;Shunpei Ota;S. Tomaru;Y. Hirose;R. Settai
CePt_2 In_7是一种反铁磁体，TN = 5.4K，在临界压力Pc = 3.2GPa附近的转变温度Tc = 2.1K处表现出压致超导性。本文研究了具有二维四方晶系结构和沿着c轴伸长的圆柱形费米面的CePt_2 In_7超导上临界场H_c ~ 2的各向异性。在2.60 GPa下，Hc 2的初始斜率为H|| [001]小于H|| [100]，反映了CePt 2 In 7的二维费米面。然而，泡利顺磁抑制是强的H|| [100]与H|| [001]在强磁场中，H|| [001]似乎大于H|| [100]在2.60 GPa的CePt 2 In 7中。
CePt2In7 is an antiferromagnet with TN = 5.4K, which shows pressure-induced superconductivity at transition temperature Tc = 2.1 K around a critical pressure Pc = 3.2 GPa. We have investigated an anisotropy of the superconducting upper critical field Hc2 in CePt2In7, which posesses two-dimensional tetragonal crystal structure and cylindrical Fermi surfaces elongated along c-axis. At 2.60 GPa, initial slope of Hc2 for H || [001] is smaller than that for H || [100], reflecting the two-dimensional Fermi surface of CePt2In7. However, Pauli paramagnetic suppression is strong for H || [100] compared with that for H || [001] in high magnetic field, and Hc2(0) for H || [001] seems to be larger than that for H || [100] at 2.60 GPa in CePt2In7.