Harmonic response of textured YBa2Cu3O7 superconductor

✍ Scribed by S.Y. Ding; F.Y. Lin; P. Zhang; Y. Ge; C. Ren; L. Qiu; X.X. Yao

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 222 KB
• Volume: 39
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(99)00056-9

✦ Synopsis

Harmonic AC susceptibilities as a function of temperature (T), AC field frequency (f), amplitude (B ac ) in DC field (B dc ) have been studied numerically as well as experimentally. The numerical calculation is based on nonlinear vortex diffusion. The numerical result shows that there exists a second harmonic, although very weak, while a third harmonic is strong. The location of the third harmonic shifts toward low temperature while its height increases with either decreasing f or increasing B ac . These numerical results are in agreement with experimental results observed for textured YBa 2 Cu 3 O 7 and in contrast with prediction of the Bean critical state model or self-organized criticality. It is also shown that the height of the third harmonic peak depends on B ac and f more sensitively than that of the fundamental one.