dc.contributor.author | Gautam, Bibek | |
dc.contributor.author | Sebastian, Mary Ann | |
dc.contributor.author | Chen, Shihong | |
dc.contributor.author | Shi, Jack J. | |
dc.contributor.author | Haugan, Timothy | |
dc.contributor.author | Xing, Zhongwen | |
dc.contributor.author | Zhang, Wenrui | |
dc.contributor.author | Huang, Jijie | |
dc.contributor.author | Wang, Haiyan | |
dc.contributor.author | Osofsky, Mike | |
dc.contributor.author | Prestigiacomo, Joseph | |
dc.contributor.author | Wu, Judy Z. | |
dc.date.accessioned | 2018-11-16T22:08:33Z | |
dc.date.available | 2018-11-16T22:08:33Z | |
dc.date.issued | 2017 | |
dc.identifier.citation | Gautam, B., Sebastian, M. A., Chen, S., Shi, J., Haugan, T., Xing, Z., ... & Prestigiacomo, J. (2017). Transformational dynamics of BZO and BHO nanorods imposed by Y2O3 nanoparticles for improved isotropic pinning in YBa2Cu3 O 7-δ thin films. AIP Advances, 7(7), 075308. | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/27396 | |
dc.description.abstract | An elastic strain model was applied to evaluate the rigidity of the c-axis aligned one-dimensional artificial pinning centers (1D-APCs) in YBa2Cu3O7-δ matrix films. Higher rigidity was predicted for BaZrO3 1D-APCs than that of the BaHfO3 1D-APCs. This suggests a secondary APC doping of Y2O3 in the 1D-APC/YBa2Cu3O7-δ nanocomposite films would generate a stronger perturbation to the c-axis alignment of the BaHfO3 1D-APCs and therefore a more isotropic magnetic vortex pinning landscape. In order to experimentally confirm this, we have made a comparative study of the critical current density Jc (H, θ, T) of 2 vol.% BaZrO3 + 3 vol.%Y2O3 and 2 vol.%BaHfO3 + 3 vol.%Y2O3 double-doped (DD) YBa2Cu3O7-δ films deposited at their optimal growth conditions. A much enhanced isotropic pinning was observed in the BaHfO3 DD samples. For example, at 65 K and 9.0 T, the variation of the Jc across the entire θ range from θ=0 (H//c) to θ=90 degree (H//ab) is less than 18% for BaHfO3 DD films, in contrast to about 100% for the BaZrO3 DD counterpart. In addition, lower α values from the Jc(H) ∼ H-α fitting were observed in the BaHfO3 DD films in a large θ range away from the H//c-axis. Since the two samples have comparable Jc values at H//c-axis, the improved isotropic pinning in BaHfO3 DD films confirms the theoretically predicted higher tunability of the BaHfO3 1D-APCs in APC/YBa2Cu3O7-δ nanocomposite films. | en_US |
dc.publisher | AIP Publishing | en_US |
dc.rights | All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license. | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en_US |
dc.title | Transformational dynamics of BZO and BHO nanorods imposed by Y2O3 nanoparticles for improved isotropic pinning in YBa2Cu3O7−δ thin films | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Gautam, Bibek | |
kusw.kuauthor | Chen, Shihong | |
kusw.kuauthor | Shi, Jack | |
kusw.kuauthor | Wu, Judy Z. | |
kusw.kudepartment | Physics and Astronomy | en_US |
dc.identifier.doi | 10.1063/1.4991051 | en_US |
kusw.oaversion | Scholarly/refereed, publisher version | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.rights.accessrights | openAccess | en_US |