United States of America as Represented by the Secretary of the Air Force

Other

Timothy J Haugan

Paul N Barnes

Judy Zhihong Wu

Rose Emergo

Joseph W Kell

The present invention provides a method of making a high temperature superconductor having a doped, nanoparticulate pinning structure. The method includes providing a nanoparticulate pinning material, providing a cuprate material, doping the nanoparticulate pinning material with a dopant to form a doped nanoparticulate material, depositing a layer of the cuprate material on a substrate, and depositing a layer of the doped nanoparticulate material on the layer of cuprate material. The invention also provides a high temperature superconductor (HTS) having a doped, nanoparticulate pinning structure including a plurality of layers of a cuprate material and a plurality of layers of a doped nanoparticulate pinning material. At least one layer of the doped nanoparticulate pinning material is stacked between two layers of the cuprate material.

Flux pinning of cuprate superconductors with nanoparticles

Porous ceramic superconductors having a film thickness over 0.5 microns are provided. The superconducting material is applied to a vicinal substrate and optionally nanoparticles are inserted to release local strain. The resultant superconductors exhibit improved Jc values compared to nonvicinal (flat) counterparts and those having no nanoparticles.

Porous ceramic high temperature superconductors and method of making same

A method for enhancing the flux pinning of a YBCO superconductor by substituting minute quantities of rare earth elements (La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) or other deleterious elements (Sc, etc.) for Y in YBCO thin films is described. The method of the present invention enables enhanced flux pinning of the material while not significantly increasing the cost of the HIS material and can be used in all HTS deposition methods since it is not process dependent.

Minute doping for YBCO flux pinning

A method of manufacturing a high temperature superconductor is disclosed. The method includes depositing, by pulsed laser deposition, alternating layers of YBa Cu O (Y123) and Y BaCuO (Y211). The Y211 layers are characterized by a multiplicity of nanosized globular inclusions, effectively enhancing flux pinning and thus increasing current transport.

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Beavercreek, OH, United States of America

Timothy J Haugan