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arXiv 1002.0208cond-mat.supr-con
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PrFeAsO $_{0.60}$ F$_{0.12}超导体的磁化强度

The magnetization of PrFeAsO$_{0.60}$F$_{0.12} sueprconductor

D. Bhoi, P. Mandal, P. Choudhury, S. Dash, A. Banerjee

摘要:

测量了PrFeAsO $_{0.60}$ F $_{0.12}$多晶样品的磁化强度随温度和磁场$(H)$的变化。观察到的总磁化强度是超导不可逆磁化强度($M_s$)和顺磁磁化强度($M_p$)的总和。对正常状态下$χ(T)$的直流磁化率的分析表明,磁化强度的顺磁分量来自Pr $^{+3}$磁矩。由磁化测量导出的晶粒内临界电流密度$(J_L)$大。$J_L(H)$曲线显示第二峰,其随着温度降低而向高场区域移动。在低场区域,高至场$H^*$的平台,随后是$J_L(H)$的幂律$H^{-5/8}$行为是强钉扎的特征。由磁化强度和电阻率数据得到了该超导体的涡旋相图。

英文摘要:

The magnetization of the PrFeAsO$_{0.60}$F$_{0.12}$ polycrystalline sample has been measured as functions of temperature and magnetic field $(H)$. The observed total magnetization is the sum of a superconducting irreversible magnetization ($M_s$) and a paramagnetic magnetization ($M_p$). Analysis of dc susceptibility $χ(T)$ in the normal state shows that the paramagnetic component of magnetization comes from the Pr$^{+3}$ magnetic moments. The intragrain critical current density $(J_L)$ derived from the magnetization measurement is large. The $J_L(H)$ curve displays a second peak which shifts towards the high-field region with decreasing temperature. In the low-field region, a plateau up to a field $H^*$ followed by a power law $H^{-5/8}$ behavior of $J_L(H)$ is the characteristic of the strong pinning. A vortex phase diagram for the present superconductor has been obtained from the magnetization and resistivity data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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