Anisotropic magnetotransport of superconducting and normal state in an electron-doped Nd1.85Ce0.15CuO4−δ single crystal

✍ Scribed by Y. Wang; H. Gao

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 487 KB
• Volume: 470
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2010.06.014

✦ Synopsis

The anisotropic properties of an optimally doped Nd 1.85 Ce 0.15 CuO 4Àd single crystal have been studied both below and above the critical temperature T c via the resistivity measurement in magnetic field H up to 12 T. By scaling the conductivity fluctuation around the superconducting transition, the upper critical field H c2 (T) has been determined for field parallel to the c-axis or to the basal ab-plane. The anisotropy factor c ¼ H kab c2 =H kc c2 is estimated to be about 8. In the normal state (50 6 T 6 180 K), the magnetoresistance (MR) basically follows an H 2 dependence and for Hkc it is almost 10 times larger than that for Hkab. Comparing with hole-doped cuprates it suggests that the optimally doped Nd 1.85 Ce 0.15 CuO 4Àd cuprate superconductor has a moderate anisotropy.