✦ LIBER ✦

The critical state model parameters of polycrystalline YBa2Cu3O7: Critical current in thin slabs and field penetration in hollow cylinders

✍ Scribed by P. Fournier; M. Aubin

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 148 KB
Volume: 235-240
Category: Article
ISSN: 0921-4534
DOI: 10.1016/0921-4534(94)91066-9

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✦ Synopsis

We compare the parameters of the Generalized Critical State Model used to reproduce data obtained from two independent measurements for polycrystalline YBa2Cu307 : the critical current of a thin slab and the central field in a hollow cylinder, both as a function of applied magnetic field and temperature. We observe a good correspondence between the parameters obtained from thin slabs (critical current) and the ones from hollow cylinders (central field). The temperature dependences of these parameters allow one to relate them to some important features of the microstructure : mean grain radius, relative orientation of the grains. The influence of the intergrain lower critical field is also considered.

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