Anisotropic Upper Critical Field in Nd1.85Ce0.15CuO4±δ Superconducting Thin Films

被引：0

作者：

N. Radhikesh Raveendran ^{[1
]}

Vinita Kumawat ^{[2
]}

E. P. Amaladass ^{[1
]}

A. T. Sathyanarayana ^{[1
]}

T. Geetha Kumary ^{[2
]}

Awadhesh Mani ^{[1
]}

机构：

[1] Condensed Matter Physics Division, Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam

[2] Homi Bhabha National Institute, Anushakthi Nagar, Maharashtra, Mumbai

来源：

Journal of Superconductivity and Novel Magnetism | 2025年 / 38卷 / 3期

关键词：

Anisotropy; High temperature superconductor; Thin film; Upper critical field;

D O I：

10.1007/s10948-025-06950-7

中图分类号：

学科分类号：

摘要：

Thin films of superconducting Nd1.85Ce0.15CuO4±δ were synthesized by a pulsed laser deposition method followed by ex situ annealing in an argon atmosphere. Structural, morphological and electrical characterizations were performed using X-ray diffraction, scanning electron microscopy and temperature-dependent resistivity measurements respectively. X-ray analysis reveals preferential orientation in (001) and (110) directions for the thin films. Resistivity measurements demonstrated a pronounced superconducting behavior in the argon annealed thin films. The critical superconducting properties, the upper critical field and critical current density, were investigated using magneto-transport and magnetization measurements. The anisotropic coefficient which is the ratio of the upper critical field parallel and perpendicular to that of ab plane has been assessed highlighting the significant anisotropy of the Nd1.85Ce0.15CuO4±δ superconductor. The analysis of the activation energy reveals the three-dimensional nature of the vortex lattice in this system. © The Author(s) 2025.

引用

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