Fluctuation conductivity of hafnium doped YBa2Cu3O7-δ ceramic
Keywords:
YBa2Cu3O7-δ ceramics, doping, fluctuation conductivity, the coherence length, 3D-2D crossover
Abstract
The conductivity of Hf doped YBa2Cu3O7-δ ceramics was studied in the thesis. It was shown that the introduction of Hf additive leads to the increase of the amount of scattering effective centers of normal carriers. Excessive conductivity of the studied samples near Tc is satisfactorily described by a theoretical model of Aslamazov-Larkin. At the same time Hf additive leads to a significant increase in the absolute value of xс(0) and the shift of 3D-2D crossover point with regard to the temperature.
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References
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P. Schleger, W. Hardy, and B. Yang. Thermodynamics of oxygen in YBa2Cu3Ox between 4500C and 6500C. Physica C, 176, 261-273, 1991.
L. G. Aslamasov and A. I. Larkin. The influence of fluctuation pairing of electrons on the conductivity of normal metal. Phys. Lett. A, 26, 238-239, 1968.
G. D. Chryssikos, E. I. Kamitsos, J. A. Kapoutsis, A. P. Patsis, V. Psycharis, A. Koufoudakis, C. Mitros, G. Kallias, E. Gamari-Seale, and D. Niarchos. X-ray diffraction and infrared investigation of RBa2Cu3O7 and RcL5PrCh5Ba2Cu3O7 compounds (R=Y and lanthanides). Physica C, 254, 44-62, 1995.
Published
2015-07-01
How to Cite
Savich, S. V., Samoilov, A. V., Samsonik, A. L., Sukhov, V. N., Tiutierieva, K. V., & Vovk, R. V. (2015). Fluctuation conductivity of hafnium doped YBa2Cu3O7-δ ceramic. Journal of V. N. Karazin Kharkiv National University. Series Physics, 1158(22), 45-47. Retrieved from https://periodicals.karazin.ua/physics/article/view/7800
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