S. S. Ragimov, I. N. Askerzade, “Thermoelectromotive force in Bi$_2$Sr$_2$Ca$_2$Cu$_4$O$_{11}$ bismuth-based high-temperature superconductor”, Zhurnal Tekhnicheskoi Fiziki, 2010, Volume 80, Issue 10,Pages 150

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Brief Communications

Thermoelectromotive force in Bi$_2$Sr$_2$Ca$_2$Cu$_4$O$_{11}$ bismuth-based high-temperature superconductor

S. S. Ragimov^a, I. N. Askerzade^b

^a Institute of Physics Azerbaijan Academy of Sciences
^b Department of Computer Engineering, Engineering Faculty of Ankara University, 06100 Tandogan, Ankara, Turkey

Abstract: The temperature dependence of the thermoemf in Bi$_2$Sr$_2$Ca$_2$Cu$_4$O$_{11}$ bismuth-based high-temperature superconductors is studied. The thermoemf is positive at high temperatures ($T >$ 300 K) and negative at low temperatures. As the temperature decreases, the thermoemf reaches a maximum slightly above $T_c$ and then sharply drops to zero. The results can be explained in the framework of the two-band theory with a linear temperature term.

Received: 06.08.2009
Accepted: 02.02.2010