Rotational Magnetic Processes in Type-II Superconductors

旋转磁化矢量实验将以Y-Bax-CuO-氧化物和其他当前感兴趣的第二类超导体进行。这些测量允许将暴露在磁场中的样品的总矢量磁化唯一地分解为抗磁(屏蔽)分量和穿透(涡旋)通量分量。高温超导体中的后一组分具有非凡的旋转特性，反映和表征了涡旋钉扎力的强度分布，而涡旋钉扎力反过来又控制着临界电流。该技术将对钉扎力的各向异性及其能量分布进行采样。这项研究将采用多晶、取向和单晶材料。

Rotational magnetization-vector experiments will be conducted with yttrium-barium-copper-oxide and other type-II superconductors of current interest. These measurements allow the total vector magnetization of a sample exposed to a field to be uniquely decomposed into a diamagnetic (shielding) component and a penetrating (vortex) flux component. The latter component in high- temperature superconductors has extraordinary rotational properties that reflect and characterize the strength distribution of the vortex pinning forces which, in turn, control the critical current. The technique will sample the anisotropous of the pinning forces as well their energy distribution. The research will employ, polycrystalline, grain-oriented and single-crystal materials.