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arXiv 1303.7281cond-mat.supr-concond-mat.str-el
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Ba0.07 K 0.93 Fe 2 As 2的滞后超导电阻转变

Hysteretic superconducting resistive transition in Ba0.07K0.93Fe2As2

Taichi Terashima, Kunihiro Kihou, Megumi Tomita, Satoshi Tsuchiya, Naoki Kikugawa, Shigeyuki Ishida, Chul-Ho Lee, Akira Iyo, Hiroshi Eisaki, Shinya Uji

摘要:

我们观察到Ba $_{0.07}$ K $_{0.93}$ Fe $_2$ As $_2$($T_c\sim$ 8 K)在面内场低于1 K时的超导电阻转变曲线的滞后现象。当磁场从$ab$平面倾斜20 $^{\circ}$或更多时,没有观察到滞后。温度和角度的依赖性的上临界场表示一个强的顺磁效应的面内字段。我们认为这种磁滞现象是由于顺磁效应引起的一级超导转变。还显示了磁转矩数据。

英文摘要:

We have observed hysteresis in superconducting resistive transition curves of Ba$_{0.07}$K$_{0.93}$Fe$_2$As$_2$ ($T_c\sim$8 K) below about 1 K for in-plane fields. The hysteresis is not observed as the field is tilted away from the $ab$ plane by 20$^{\circ}$ or more. The temperature and angle dependences of the upper critical field indicate a strong paramagnetic effect for in-plane fields. We suggest that the hysteresis can be attributed to a first-order superconducting transition due to the paramagnetic effect. Magnetic torque data are also shown.

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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