Comparison of fast-neutron irradiation effects in YBa2Cu3O7−x (123) and YBa2Cu4O8 (124) ceramics

✍ Scribed by A. Wisniewski; G. Brandstätter; C. Czurda; H.W. Weber; A. Morawski; T. Lada

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 437 KB
• Volume: 220
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)90899-0

✦ Synopsis

A comparison of fast-neutron irradiation effects on the irreversibility line (IL) and the intragrain critical current densities (J¢) in the 90 K and the 60 K phase of YBa2Cu3OT_x ( 123 ) and in YBazCu4Os (124) ceramics is presented. The 124 compound shows a transition into the reversible regime at distinctly lower temperatures and fields than the 90 K phase of 123. However, the IL of 124 lies above the one of the 60 K phase. Upon irradiation we observe a pronounced shift of the position of the IL to higher fields and temperatures for the 60 K phase of 123 and for the 124 compound. The IL remains almost unchanged in the 90 K phase of 123 at the relatively low fluences employed so far. We also observe an increase of J¢ after irradiation. The values of the Jc enhancement as well as their temperature and field dependence vary considerably among these compounds.