Preparation and superconducting properties of the (Cu,C)Ba₂Ca₃Cu₄O_11+y films with zero-resistance transition temperature of 96 K

Abstract

Cu,C)Ba 2 Ca 3 Cu 4 O 11+y is a nontoxic cuprate system with a superconducting transition temperature (T c ) of about 117 K for bulk samples. Recently, it is found that the bulk samples of this material synthesized under high pressure hold the highest irreversibility line among all the superconductors, which is very promising for the application in the liquid nitrogen temperature region. In this paper, we report successful growth of a-axis oriented (Cu,C)Ba 2 Ca 3 Cu 4 O 11+y films by pulsed laser deposition method on LaAlO 3 (001) substrates. The maximum zeroresistance T c obtained in our work is as high as 96 K which is 18 K higher than the T c reported previously in this system. The magnetization and resistivity measurements reveal that the superconducting properties of the films are significantly improved. These newly observed properties enhance the prospect of potential applications of this material.

Characterization of the (Cu,C)Ba2Ca3Cu4O 11+δ single crystals grown under high pressure

“…The irreversibility field reaches 15 T at 86 K and 5 T at 98 K, respectively [14]. Furthermore, the (Cu,C)-1234 thin films have also been fabricated successfully [15]. Based on these excellent characteristics, the (Cu,C)-1234 superconductor is considered to be a promising candidate for practical applications above liquid nitrogen temperature.…”

Characterization of the (Cu,C)Ba$_2$Ca$_3$Cu$_4$O$_{11+δ}$ single crystals grown under high pressure

“…The irreversibility field reaches 15 T at 86 K and 5 T at 98 K, respectively [14]. Furthermore, the (Cu,C)-1234 thin films have also been fabricated successfully [15]. Based on these excellent characteristics, the (Cu,C)-1234 superconductor is considered to be a promising candidate for practical applications above liquid nitrogen temperature.…”