Anomalous Hc1(T) behavior of single crystalline YBa2Cu3O7-δ

✍ Scribed by H. Adrian; W. Assmus; A. Höhr; J. Kowalewski; H. Spille; F. Steglich

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 144 KB
• Volume: 162-164
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(89)91039-3

✦ Synopsis

We report tic-magnetization measurements M(T,H) on a single crystal of YB%Cu307 ~using a SQUID magnetometer. From the M(T,H) data we determined the lower critcal field Hc~(T ). For'both orientations of, the field, Rarallel and perpendicular to the c-axis, we find remarkable anomalous enhancements of H~'z(T) and H~(T) for T < 40K compared to the behavior expected from the data for T > 40K.