Effects of particle irradiations on vortex states in iron-based superconductors
Effects of particle irradiations on vortex states in iron-based superconductors
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DOI：
10.1088/0953-2048/25/8/084008
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发表时间：
2012-08
影响因子：
3.6
通讯作者：
T. Tamegai;T. Taen;Hidenori Yagyuda;Y. Tsuchiya;S. Mohan;T. Taniguchi;Y. Nakajima;S. Okayasu
中科院分区：
文献类型：
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作者：
T. Tamegai;T. Taen;Hidenori Yagyuda;Y. Tsuchiya;S. Mohan;T. Taniguchi;Y. Nakajima;S. Okayasu
用不同的高能粒子辐照铁基超导体，系统地研究了它们对铁基超导体的临界电流密度和涡旋动力学的影响。结果表明，具有足够能量沉积速率的高能粒子能增强JC，抑制涡旋动力学，与高温铜酸盐超导体的情况类似。一般来说，JC的增强持续到比铜酸盐高得多的辐照剂量。然而，辐射效应的细节取决于离子种类和它们的能量。即使离子和能量相同，这种效应对不同类型的铁基超导体也不是通用的。不可逆磁化强度的角度依赖关系证实了重离子辐照产生的缺陷的关联性。
Various kinds of energetic particles are irradiated into iron-based superconductors, and their effects on the critical current density (Jc) and vortex dynamics have been systematically studied. It is found that Jc is enhanced and vortex dynamics is strongly suppressed by energetic particles having a sufficient energy deposition rate, similar to the case of high temperature cuprate superconductors. The enhancement of Jc, in general, persists up to much higher irradiation doses than in cuprates. However, details of the effect of irradiation depend on the kind of ion species and their energies. Even with the same ions and energies, the effect is not universal for different kinds of iron-based superconductors. The correlated nature of defects created by heavy-ion irradiation is confirmed by the angular dependence of irreversible magnetization.