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Opis

A possibility of co-existence anti-ferromagnetism and superconductivity in oxide high temperature superconductors (HTSC) is studied. Also these studies established that the Ferro-magnetism and superconductivity can co-exist in HTSC. The magnitude of superconductivity increases with enhanced carrier's density in Cu0.5Tl0.5Ba2Can-1- zMzCun-yZnyO2n+4-d (M=Mg,Be; n=3,4; y=0,1,2,3) systems. FTIR absorption measurements of Zn and Cd- doped Cu0.5Tl0.5Ba2Ca2Cu3-yMyO10-d (M=Zn, Cd; y=0, 0.5, 1.0, 1.5, 2.0) samples have shown that electron phonon mechanism different from the BCS is essential in HTSC. By carrying out excess conductivity analyses, the coherence length, inter-plane coupling strength, exponent and dimensionality of fluctuations have been studied. The coherence length along the c-axis and interlayer coupling strength J are found to increase with increases Mg and Be doping at the Ca sites. The values of these parameters are improved after post-annealing of the samples in oxygen atmosphere which showed the intrinsic role of the optimized carrier's concentration in conducting CuO2 planes in the mechanism of HTSC.

Szczegóły książki

Kategoria Książki po angielsku Mathematics & science Physics

• Pełny tytuł: CuTl-Based High Temperature Superconductors
• Autor: Nawazish A. Khan
• Język: Angielski
• Oprawa: Miękka
• Liczba stron: 328
• EAN: 9783639268447
• ISBN: 363926844X
• ID: 06834133
• Wydawca: VDM Verlag
• Waga: 481 g
• Wymiary: 229 × 152 × 19 mm
• Data wydania: 23. June 2010

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