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- Title
Effect of Nonstoichiometric Disorder on the Upper Critical Field in Electron Doped Nd<sub>2− x </sub>Ce<sub> x </sub>CuO<sub>4+ δ </sub> Single Crystals.
- Authors
Charikova, T. B.; Shelushinina, N. G.; Harus, G. I.; Ivanov, A. A.
- Abstract
Temperature dependences of the electrical resistivity measured in different magnetic fields ( B ∥ c, J ∥ ab) of electron doped Nd2− x Ce x CuO4+ δ single crystals with different cerium concentration ( x=0.15, 0.17, and 0.20) and oxygen content ( δ) were studied in a temperature range of 1.8–40 K. It was found that the slope of the upper critical field $(dB_{c2}/dT)|_{T_{c}}$ decreases with the increase of the disorder in the system. So, we can distinguish experimentally d-wave and anisotropic s-wave superconductors. Moreover, the slope of the upper critical field and critical temperature decrease with increase of the disorder parameter like in d-wave superconductors with anisotropic scattering.
- Subjects
HIGH temperature superconductivity research; SUPERCONDUCTORS; MAGNETIC fields; ORDER-disorder models; ANNEALING of metals; QUANTUM theory
- Publication
Journal of Superconductivity & Novel Magnetism, 2009, Vol 22, Issue 1, p21
- ISSN
1557-1939
- Publication type
Article
- DOI
10.1007/s10948-008-0371-7