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

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

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 pinn...

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Bibliographic Details
Main Authors: 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.
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2011
Subjects:
DRNTU::Engineering::Materials::Nanostructured materials
Online Access:https://hdl.handle.net/10356/93772
http://hdl.handle.net/10220/6890
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Institution: Nanyang Technological University
Language: English
Description
Summary: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.

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