Abstract
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.
Published Version
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