Article ID Journal Published Year Pages File Type
1820431 Physica C: Superconductivity and its Applications 2006 6 Pages PDF
Abstract

The c-axis alignment of Nd1.85Ce0.15CuO4.105 superconducting powder was achieved by applying an external magnetic field of 1 T perpendicular to the axis of rotation of powder/epoxy tetragonal holder. The temperature dependencies of the in-plane penetration depth λab and out-of-plane penetration depth λc were obtained by measuring the zero-filed-cooled ac diamagnetic susceptibility χd(T) in a low applied field (Ba = 10 Oe). An observed Nd paramagnetic background was subtracted. The relative change temperature dependence penetration depth Δλ(T) = λ(T) − λ(0) for both c-axis parallel and perpendicular to the applied field can be fitted to a quadratic d-wave rather than an exponential s-wave like function up to 0.5Tc. This result is in agreement with recent experiments suggest the unconventional nature for electron-doped RCCO (R = Pr, Nd, La, Eu, Sm) cuprates.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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