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Magnetic hysteresis and critical current densities of polycrystalline REBa2Cu3O7−y

✍ Scribed by Yunhui Xu; Weiyan Guan; K. Zeibig; C. Heiden

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
378 KB
Volume
29
Category
Article
ISSN
0011-2275

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✦ Synopsis

Magnetization curves of bulk REBa2Cu3O7= v samples (RE=Gd, Dy, Er, Eu, Y) with T~(R = 0) ~> 90 K have been measured at various temperatures for different sweep amplitudes of the magnetic field up to Hmax = 4.7 T. Using the critical state model, intergranular and intragranular critical current densitites were derived from the hysteresis loops at low and high fields, respectively. There are indications of enhanced flux pinning by a quenched second superconducting phase, since the field dependence of intragranular critical current density was found to exhibit a maximum at intermediate temperatures.

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