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Journal Article

Thermodynamic and transport properties of high-Tc superconductors

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Steglich, F., Ahlheim, U., Ewert, D., Gottwick, U., Held, R., Kneissel, H., et al. (1988). Thermodynamic and transport properties of high-Tc superconductors. Physica Scripta, 37(6), 901-904. doi:10.1088/0031-8949/37/6/010.

Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-CF91-6
We report measurements of (i) the DC magnetization of La1.85Sr0.15CuO4 and YBa2Cu3O7, (ii) thermal properties of La2-xSrxCuO4 (x = 0.15) and (iii) transport properties of YBa2Cu3O7. We arrive at the following results: (i) The shielding magnetization of the sintered pellets studied is dominated by inter-grain Josephson contacts, but we find no evidence for additional intra-grain Josephson contacts. (ii) High-Tc superconductivity is a bulk effect. (iii) For YBa2Cu3O7 the effective mass m* of those carriers involved in the superconducting transition is of the order of 4m0.