Temperature dependence of the upper critical field of high-Tc superconductors from isothermal magnetization data. Application to polycrystalline samples and ceramics

Details Temperature dependence of the upper critical field of high-Tc superconductors from isothermal magnetization data. Application to polycrystalline samples and ceramics Temperature dependence of the upper critical field of high-Tc superconductors from isothermal magnetization data. Application to polycrystalline samples and ceramics

2002-09-30

arxiv.org/abs/cond-mat/0209684v2

Physica C 385, 544 (2003).

Physics

Condensed Matter

Superconductivity

10 pages, 5 figures

Scientific paper

10.1016/S0921-4534(02)02291-8

Using a recently developed scaling procedure that allows to establish the temperature dependence of the normalized upper critical field from measurements of the equilibrium isothermal magnetization, we analyze experimental data obtained on polycrystalline and ceramic samples. We show that the scaling procedure works quite well in all cases that we have considered. This provides a very strong evidence that the temperature dependencies of the normalized upper critical field are independent of the orientation of an applied magnetic field with respect to the crystallographic axes of these materials.

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