Enhanced Superconductivity Induced by the Hexagonal-Array-Cooling-Shrinkage Effect
Source abstract
Abstract
Improving the superconductivity of thin films, especially the critical current density (JC) and the critical field (HC), is crucial for the application of superconducting devices. Here, we apply a simple hybrid structure to enhance the superconductivity of Nb films induced by a hexagonal-array-cooling-shrinkage (HACS) effect, which is very sensitive to the temperature and magnetic field. The HC of the hybrid at 8.8 K is ∼32% more than that of a flat Nb film, while it is increased to ∼1000% at 8.97 K. In addition, the HACS effect to enhance superconductivity is more effective than that by uniform compression stress with the same value. The newly proposed approach can be used as self-protection to prevent superconducting devices from losing their superconductivity due to excessive current or magnetic fields.
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Research context
OpenAlex topics: Physics of Superconductivity and Magnetism · Superconductivity in MgB2 and Alloys · Iron-based superconductors research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou 318000, China
Department of Mechanical Engineering, University of Delaware, Newark, Delaware 19716, United States
School of Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, China
Physics Department, Zhejiang University, Hangzhou 310027, China
High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China
Funding
China Scholarship Council · National Natural Science Foundation of China
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