A study of the plasticity in the vortex matter across the second magnetization peak in a YBCO crystal via measurements of minor hysteresis loops

Pramana

D Pal1¹  S Ramakrishnan¹  A K Grover¹  Bimal K Sarma²  D Dasgupta² 

[1] Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India$$;Department of Physics, University of Wisconsin, Milwaukee, WI-53201, USA$$

关键词: Flux pinning;    critical currents;    YBa2Cu3O7-𝛿;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Results of an investigation of the path dependence of the critical current density 𝐽c due to the plastic deformation of the flux line lattice in a weakly pinned YBa2Cu3O7-𝛿 (YBCO) crystal for $H||c$ are reported. The procedure of minor hysteresis loops has been used to explore the path dependence of 𝐽c and the metastability effects. Contrary to the behavior observed in low 𝑇c systems, in YBCO it is found that at low temperatures, the multivaluedness in 𝐽c(𝐻) could persist beyond the notional peak field 𝐻p at which the anomalous variation in 𝐽c(𝐻) reaches its maximum value.

【 授权许可】

Unknown