Structural and Electromagnetic Study of Heavily Doped ZR-Added REBCO Coated Conductors Fabricated by Reel-To-Reel MOCVD
type: CreativeWork
description: High Temperature Superconducting (HTS) Coated Conductors (CCs) based on epitaxial REBa2Cu3O7-δ (REBCO, RE = rare earth) films with superior mechanical strength and high current carrying capacity are being developed for various large-scale electric power and magnetic applications. The critical current density (Jc) of REBCO coated conductors in a magnetic field is higher than that of any other HTS. However, further Jc enhancement in REBCO coated conductors, particularly in fields perpendicular to the tape (B||c) is necessary due to the highly anisotropic nature of REBCO films. The inherently high in-field angular anisotropy of Jc of REBCO CCs can be diminished by introducing Artificial Pinning Centers (APCs) with optimal size, geometry, and density. The incorporation of a high BaMO3 (BMO; M=Zr, Hf, Sn) dopant concentration in REBCO films to achieve a higher density of nanoscale defects has been demonstrated in this work as a very effective strategy to pin the vortices, especially in moderate-to-high applied magnetic fields and low temperatures. Determination of the optimum chemical composition and the REBCO c-axis lattice parameter has been an important objective to create self-assembled growth of elongated perovskite oxide nanostructures at different Zr dopant levels. Maintaining an optimal texture of the epitaxial REBCO film amidst a high density of BMO nanocolumnar defects was another objective. In the present work, REBCO films with 15 and 25 mol.% Zr addition were grown on biaxially-textured templates on metal substrates using a reel-to-reel Metal Organic Chemical Vapor Deposition (MOCVD) method to systematically investigate the self-assembled BZO generated nanorods and the influence of increased Zr content on the texture and superconducting properties. The optimal composition range of 15 and 25 mol.% Zr-added REBCO to achieve the highest self-field and in-field performance has been determined. Also, the influence of REBCO c-axis lattice parameter on the elastic m…
abstract: High Temperature Superconducting (HTS) Coated Conductors (CCs) based on epitaxial REBa2Cu3O7-δ (REBCO, RE = rare earth) films with superior mechanical strength and high current carrying capacity are being developed for various large-scale electric power and magnetic applications. The critical current density (Jc) of REBCO coated conductors in a magnetic field is higher than that of any other HTS. However, further Jc enhancement in REBCO coated conductors, particularly in fields perpendicular to the tape (B||c) is necessary due to the highly anisotropic nature of REBCO films. The inherently high in-field angular anisotropy of Jc of REBCO CCs can be diminished by introducing Artificial Pinning Centers (APCs) with optimal size, geometry, and density. The incorporation of a high BaMO3 (BMO; M=Zr, Hf, Sn) dopant concentration in REBCO films to achieve a higher density of nanoscale defects has been demonstrated in this work as a very effective strategy to pin the vortices, especially in moderate-to-high applied magnetic fields and low temperatures. Determination of the optimum chemical composition and the REBCO c-axis lattice parameter has been an important objective to create self-assembled growth of elongated perovskite oxide nanostructures at different Zr dopant levels. Maintaining an optimal texture of the epitaxial REBCO film amidst a high density of BMO nanocolumnar defects was another objective. In the present work, REBCO films with 15 and 25 mol.% Zr addition were grown on biaxially-textured templates on metal substrates using a reel-to-reel Metal Organic Chemical Vapor Deposition (MOCVD) method to systematically investigate the self-assembled BZO generated nanorods and the influence of increased Zr content on the texture and superconducting properties. The optimal composition range of 15 and 25 mol.% Zr-added REBCO to achieve the highest self-field and in-field performance has been determined. Also, the influence of REBCO c-axis lattice parameter on the elastic m…
author: Heydari Gharahcheshmeh, Meysam
language: eng
keywords: MOCVD, REBCO, Coated conductors, HTS
date published: 2017-08
date modified: 2026-07-24T02:32:54Z
provider: University of Houston
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Houston

PropertyValue
property ID: Handle
value: https://hdl.handle.net/10657/4383