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41.
S. Sarkar C. V. Tomy A. D. Thakur G. Balakrishnan D. McK Paul S. Ramakrishnan A. K. Grover 《Pramana》2006,66(1):179-192
We have studied metastability effects pertaining to the peak effect (PE) in critical current density (J
c) via isofield scans in AC susceptibility measurements in a weakly pinned single crystal of Yb3Rh4Sn13 (T
c(0) ≈ 7.6 K). The order-disorder transition in this specimen proceeds in a multi-step manner. The phase coexistence regime
between the onset temperature of the PE and the spinodal temperature (where metastability effects cease) seems to comprise
two parts, where ordered and disordered regions dominate the bulk behavior, respectively. The PE line in the vortex phase
diagram is argued to terminate at the low field end at a critical point in the elastic (Bragg) glass phase. 相似文献
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