SPECIFIC HEAT OF THE HIGH Tc SUPERCONDUCTOR Bi-Sr-Ca-Cu-O
- 1 August 1988
- journal article
- research article
- Published by World Scientific Pub Co Pte Ltd in Modern Physics Letters B
- Vol. 02 (07) , 885-889
- https://doi.org/10.1142/s0217984988000643
Abstract
The Bi-Sr-Ca-Cu-O superconductor with the nominal composition (1113) were prepared. An orthorhombic unit cell (a=0.544 nm , b=0.543 nm , c=3.07 nm ) was determined by X-ray diffraction. The resistance transition curve shows that the sample has an onset around 110K and the zero resistance temperature at 85K. The mutual inductance measurement also shows a two-step transition which correspond to two superconducting phases as well as that in the resistive transition. The specific heat measurement was performed in the range of 56K to 130K by continuous scanning method. A simple extrapolation of the curve was made both from below and above T c to yield ΔC=45 mj /g. K and ΔC/T c =0.49 mj /g. K 2. From these values, the Sommerfeld constant γ and the Debye temperature θ D were estimated.Keywords
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