Provided is a method of forming a superconducting wire, the method including forming a superconducting precursor film on a substrate, the super conducting precursor film containing Re, Ba, and Cu having a composition in which Ba is poor and Cu is rich compared to stoichiometric ReBCO(Gd.sub.1Ba.sub.2Cu.sub.3O.sub.7y, 0y6, Re: Rare earth element), heating the substrate to melt the superconducting precursor film, providing an oxygen gas having an oxygen partial pressure of about 10 mTorr to about 200 mTorr on the molten superconducting precursor film to form a superconducting layer including an epitaxial superconductor biaxially aligned only in the c-axis direction perpendicular to the substrate, and cooling the substrate.

A method and composition for doped HTS tapes having directional flux pinning and critical current.

According to various implementations of the invention, a vertical Josephson Junction device may be realized using molecular beam epitaxy (MBE) growth of YBCO and PBCO epitaxial layers in an a-axis crystal orientation. Various implementations of the invention provide improved vertical JJ devices using SiC or LSGO substrates; GaN, AlN, or MgO buffer layers; YBCO or LSGO template layers; YBCO conductive layers and various combinations of barrier layers that include PBCO, NBCO, and DBCO. Such JJ devices are simple to fabricate with wet and dry etching, and allow for superior current flow across the barrier layers.

A method and composition for doped HTS tapes having directional flux pinning and critical current.

A method for manufacturing an HTS coated tape (34) includes providing a substrate tape (1), depositing a textured buffer layer (3) onto a front side (7) of the substrate tape, depositing an HTS layer (32) onto the front side, and depositing a functional layer (2) onto a bottom side (6) of the substrate tape. The functional layer exerts a mechanically deforming effect on the substrate tape opposing a mechanically deforming effect on the substrate tape exerted by the textured buffer layer deposited on the front. The functional layer is at least partially deposited before and/or during the depositing of the textured buffer layer. This permits an HTS coated tape, with which higher critical currents of the HTS layer are achieved, to be produced.

A ceramic sheet includes a first surface, a second surface opposite the first surface, and a pair of parallel edges extending therebetween. A thickness of the ceramic sheet is defined between the first and second surfaces, a width of the ceramic sheet is defined between the pair of parallel edges, and a length of the ceramic sheet is defined as a dimension orthogonal to both the thickness and the width. The thickness is less than or equal to 100 m, the length is greater than or equal to 10 m, and the width is less than or equal to 12 mm. The ceramic sheet has a grain size of less than or equal to 0.2 m and a porosity of less than or equal to 5%.

An ultra-thin film superconducting tape and method for fabricating same is disclosed. Embodiments are directed to a superconducting tape being fabricated by processes which include removing a portion of the superconducting tape's substrate subsequent the substrate's initial formation, whereby a thickness of the superconducting tape is reduced to 15-80 m.

An oxide superconducting thin film material includes: a metal substrate having a surface with a biaxially oriented crystal orientation structure; an intermediate layer biaxially oriented and formed on the metal substrate; and an oxide superconducting thin film formed on the intermediate layer and composed of a RE123-based oxide superconductor represented by REBa.sub.2Cu.sub.3O.sub.y. The oxide superconducting thin film includes Br (bromine).

According to various implementations of the invention, a vertical Josephson Junction device may be realized using molecular beam epitaxy (MBE) growth of YBCO and PBCO epitaxial layers in an a-axis crystal orientation. Various implementations of the invention provide improved vertical JJ devices using SiC or LSGO substrates; GaN, AlN, or MgO buffer layers; YBCO or LSGO template layers; YBCO conductive layers and various combinations of barrier layers that include PBCO, NBCO, and DBCO. Such JJ devices are simple to fabricate with wet and dry etching, and allow for superior current flow across the barrier layers.

A coated conductor comprises a substrate supporting a ReBCO superconductor adapted to carry current in a superconducting state. The superconductor is characterized in having peaks in critical current (J.sub.c) of at least 0.2 MA/cm.sup.2 in a magnetic field of about 1 Tesla when the field is applied normal to the surface of the superconductor and when the field is applied parallel to the surface of the superconductor, and further characterized in that the superconductor includes horizontal defects and columnar detects in a size and an amount sufficient to result in the said critical current response. The conductor is characterized in that the ratio of the height of the peaks in the J.sub.c is in the range from 3:1 with the ratio of the field perpendicular (0 degrees) to the field parallel (+/90 degrees) to the range from 3:1 with the ratio of the field parallel to the field perpendicular.