Wimbush, SC and Yu, R and Bali, R and Durrell, JH and MacManus-Driscoll, JL (2010) Addition of ferromagnetic CoFe2O4 to YBCO thin films for enhanced flux pinning. Physica C: Superconductivity and its Applications, 470. S223-S224. ISSN 0921-4534Full text not available from this repository.
An attempt has been made to prepare a YBa2Cu3O 7-δ (YBCO) thin film doped with ferromagnetic CoFe 2O4. Transmission electron microscopy of the resultant samples shows, however, that Y(Fe, Co)O3 forms as a nanoparticulate dispersion throughout the film in preference to CoFe2O4, leaving the YBCO yttrium deficient. As a consequence, the superconducting properties of the sample are poor, with a self-field critical current density of just 0.25 MA cm-2. Magnetic measurements indicate however that the Y(Fe, Co)O3 content, together with any other residual phases, is also ferromagnetic, and some interesting features are present in the in-field critical current behaviour, including a reduced dependence on applied field and a strong c-axis peak in the angular dependence. The work points the way towards future attempts utilising YFeO3 as an effective ferromagnetic pinning additive for YBCO. © 2009 Elsevier B.V. All rights reserved.
|Uncontrolled Keywords:||Critical current Cuprate superconductors Flux pinning Magnetic pinning|
|Divisions:||Div C > Materials Engineering|
|Depositing User:||Cron Job|
|Date Deposited:||07 Mar 2014 11:40|
|Last Modified:||23 Jan 2015 19:35|