Polystyrene colloidal sphere and niobium film composite heterogeneous structure superconducting material and preparation method

Abstract

The invention discloses a polystyrene colloidal sphere and niobium film composite heterogeneous structure superconducting material, which comprises a substrate, a niobium film and a polystyrene colloidal hexagonal array film, wherein the niobium film is located on the substrate, and the polystyrene colloidal hexagonal array film coats the niobium film; the polystyrene colloidal hexagonal array film comprises multiple polystyrene colloidal microspheres; and single layers of the polystyrene colloidal microspheres are tightly arranged to form the hexagonal array. The invention also discloses a method of preparing the superconducting material. The polystyrene colloidal microspheres and the niobium superconducting film material are constructed into a heterogeneous structure nanostructure material; through changing the contact area between the colloidal spheres and the niobium substrate, the critical temperature for superconducting transition is regulated, the superconducting transition temperature Tc<onset> for the niobium film is thus improved; and the material preparation process is simple, needed devices are few, the superconducting material preparation cost is greatly reduced, and popularization and application are facilitated.

Description

technical field [0001] The invention relates to a composite heterostructure superconducting material of polystyrene colloidal spheres and niobium films and a preparation method thereof. Background technique [0002] The superconducting state is a macroscopic quantum coherence phenomenon in which a large number of electrons are paired and condensed. It not only has important application value, but also involves a major basic scientific problem of the many-body effect of electrons in solid systems. Due to its unique zero-resistance current carrying and the quantum coherence effect of superconducting condensation, superconductivity has shown people its broad application prospects since its discovery. However, there are still many obstacles in the practical application of superconducting materials. For a superconducting material, its superconductivity depends on three critical parameters: critical temperature, critical magnetic field and critical current density. When the temper...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem that the current superconducting materials usually increase the superconducting transition temperature by high pressure, thereby improving their superconductivity, but the huge pressure requires high equipment, resulting in difficult application and high cost

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