頁籤選單縮合
題 名 | Peak Effect and Vortex Lime Lattice Melting in Single Crystalline YNi₂B₂C |
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作 者 | Hirata,K.; Takeya,H.; Miyamoto,S.; Mochiku,T.; Togano,K.; | 書刊名 | Chinese Journal of Physics |
卷 期 | 36:2(Part2) 民87.04 |
頁 次 | 頁215-221 |
分類號 | 330 |
關鍵詞 | |
語 文 | 英文(English) |
英文摘要 | Anomalous magnetic behavior has been studied on single crystalline YNi₂B₂C by dc-magnetization and ac-susceptibility measurements. Peak effect has been found in the reversibility region close to the upper critical field Hc₂(T) by dc-magnetization and ac-susceptibility. The peak effect observed by dc-magnetization is ceased at about 18 kOe and 11 K with decreasing magnetic field parallel to the c-axis and increasing temperature. However, in ac-susceptibility, a sharp dip structure is still observed to about 5 kOe and 13.3 K, instead of the broad one at the higher magnetie fields of the peak effect region than about 15 kOe. A magnetic phase diagram of YNi₂B₂C has been established. From the characteristic features of the peek effect, it is speculated as a universal feature in almost isotropic superconductors with weak pinning centers that the transition from the peak effect (accompanied with the vortex glass melting) to the vortex lattice melting occurs successively with decreasing magnetic field and increasing temperature. |
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