Temperature dependence of flux pinning in YBa2Cu3Ox

✍ Scribed by Donglu Shi; Ming Xu; Mark S. Boley; U. Welp

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 635 KB
• Volume: 160
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(89)90414-0

✦ Synopsis

Magnetization versus applied field data have been taken up to 5 T over a wide temperature range from 10 K to 77 K for polycrystalline YBa,Cu,O, with x=6.98 and x=6.62. The intragrain critical current density has been calculated based on the magnetization measurements. The observed temperature dependence of the flux pinning behavior in the x= 6.98 sample indicates a new pinning mechanism in the intermediate temperature region, whose strength increases linearly with the applied field above certain field values. The experimental results also suggest that the twin boundary pinning is active only in the low temperature