Author: Martin George YoungPublisher:
ISBN:
Category : Flux pinning
Languages : en
Pages : 188
Book Description
Flux Pinning in Superconducting Thin Films of Y1Ba2Cu3O7-x
Author: Martin George YoungPublisher:
ISBN:
Category : Flux pinning
Languages : en
Pages : 188
Book Description
Enhanced Flux-Pinning Properties in Superconducting YBa2Cu3O7-[delta] Thin Films with Nanoengineering Methods
![Enhanced Flux-Pinning Properties in Superconducting YBa2Cu3O7-[delta] Thin Films with Nanoengineering Methods PDF](https://books.google.com/books/content/images/frontcover/Jq6xngEACAAJ?fife=w80-h100)
Author: Chen-Fong TsaiPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Since the discovery of the high temperature superconductor YBa2Cu3O7-[delta] (YBCO), with transition temperature (Tc = 77 K), above liquid nitrogen point in 1987 many research projects have been dedicated to enhancing the high field performance of this material for practical applications. The 2nd generation YBCO-based coated conductors are believed to be the most promising approach for commercial applications including power transmission, motors, generators, and high field magnets. With the advances of nanotechnologies, different nanoengineering methods have been demonstrated to enhance the performance of YBCO thin films, include doping with 0-dimensional (0-D) self-assembled nanoparticles, 1-dimensional (1-D) nanorods, and 2-dimensional (2-D) nanolayers. Furthermore, dopants with ferromagnetic properties are also reported to provide enhanced pinning effects by Lorentz force, especially under high-applied magnetic fields. The principle of these methods is to generate high-density defects at the heterogeneous interfaces as artificial pinning centers in an effort to improve the flux-pinning properties. The morphology and dimensions of the nanoinclusions play an important role in pining enhancement. Optimized pinning structures are likely to be located at energetically favorable vortex cores, which form a triangular lattice with dimensions close to the YBCO coherence length [xi]([xi]ab ~ 4 nm; [xi]c ~ 0.5 nm at 77 K.) However, it is challenging to achieve small dimensional nanodopants in the vapor deposited YBCO thin films. The purpose of this research is to utilize nanoengineering methods to produce optimized pinning structure in YBCO thin films. In this thesis, we systematically study the effects of different nanoinclusions on the flux-pinning properties of YBCO thin films. The 0-D ferromagnetic Fe2O3 and CoFe2O4 nanoparticles, 2-D CeO2 multilayers, and tunable vertically aligned nanocomposites (VAN) of (Fe2O3)x:(CeO2)1-x and (CoFe2O4)x:(CeO2)1-x systems are introduced into the YBCO matrix as artificial pinning centers. Results suggest that all nanoinclusions showed significant enhancement in the superconducting properties of YBCO. The ferromagnetic pinning centers dominate at high field and low temperature regimes, however, the defect pinning centers dominate at low field and high temperature regimes. The uniquely arranged VAN structure of alternating magnetic and non-magnetic nanophases, which incorporates both high defect density and tunable distribution of magnetic dopants, is believed to be an ideal solution for flux-pinning enhancement. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/149478
Flux Pinning in Yttrium Barium Copper Oxide Superconducting Thin Films
Author: Penelope Anne PullanEnhancing the Flux Pinning of High Temperature Superconducting Yttrium Barium Copper Oxide Thin Films
Author: Mary Ann Patricia SebastianPublisher:
ISBN:
Category : Flux pinning
Languages : en
Pages : 129
Book Description
Flux pinning and structural properties of high-T[tief]c superconducting thin films
![Flux pinning and structural properties of high-T[tief]c superconducting thin films PDF](https://books.google.com/books/content/images/frontcover/7b01HQAACAAJ?fife=w80-h100)
Author: Hendrik Roelof Anastasius DouwesPublisher:
ISBN:
Category :
Languages : en
Pages : 131
Book Description
Flux Pinning and Structural Porperties of High-Tc Superconducting Thin Films
Author: Hendrik Roelof Anastasius DouwesPublisher:
ISBN:
Category :
Languages : en
Pages : 131
Book Description
Flux Pinning in YBCO Superconductor
Author: David Bostonian JanPublisher:
ISBN:
Category : Ferromagnetic materials
Languages : en
Pages : 332
Book Description
Critical Currents in Superconducting Thin Films and Multilayers
Author: Ernest V. KadyrovRelationship between microstructural defects and flux pinning properties in REBa2Cu3O7-8 thin films for 2nd generation high temperature superconducting tapes
Author: Xiao-Fen LiPublisher:
ISBN: 9788755039483
Category :
Languages : en
Pages :
Book Description
Author: