Intense vortex pinning enhanced by semicrystalline defect traps in self-aligned nanostructured MgB2

• المؤلفون الرئيسيون: Li, S., White, Timothy John, Laursen, K., Tan, T. T., Sun, C. Q., Dong, Zhili, Li, Y., Zho, S. H., Horvat, J., Dou, S. X.
• مؤلفون آخرون: School of Materials Science & Engineering
• التنسيق: مقال
• اللغة: English
• منشور في: 2011
• الموضوعات: DRNTU::Engineering::Materials::Nanostructured materials
• الوصول للمادة أونلاين: https://hdl.handle.net/10356/93772; http://hdl.handle.net/10220/6890
• المؤسسة: Nanyang Technological University

In this work, we report the discovery of a vortex pinning source: semicrystalline defect wells in self-aligned nanostructured MgB2. It is demonstrated that these aperiodic regions trap numerous crystal defects migrating along nanodomain boundaries during self-alignment and act as intense vortex pinning centers that significantly enhance the high-field performance of MgB2. This suggests that the density of trapped defects in the wells is much greater than that found in other vortex pinning sources.