2024-03-29T14:12:23Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00028486
2023-01-16T04:21:04Z
320:321:322
Grain boundary characteristics of oxypnictide NdFeAs(O,F) superconductors
Iida, Kazumasa
Omura, Taito
Matsumoto, Takuya
Hatano, Takafumi
Ikuta, Hiroshi
open access
This is an author-created, un-copyedited version of an article published in {Superconductor Science and Technology}. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at {https://doi.org/10.1088/1361-6668/ab1660}. “This Accepted Manuscript is available for reuse under a CC BY-NC-ND 3.0 licence after the 12 month embargo period provided that all the terms of the licence are adhered to”
We have systematically investigated the grain boundary angle (θ GB) dependence of transport properties for NdFeAs(O,F) fabricated on [001]-tilt symmetric MgO bicrystal substrates. In our previous study, NdFeAs(O,F) bicrystal films showed a weak-link behaviour even at a θ GB of 6°. However, this was caused by an extrinsic effect originating from the damage to both NdFeAs(O,F) and MgO substrate by excess F-diffusion along the grain boundary. To investigate the intrinsic nature of grain boundaries, we minimized the damage to NdFeAs(O,F) and MgO by reducing the deposition temperature of the NdOF over-layer needed for F-doping. The resultant NdFeAs(O,F) bicrystal films have a critical angle of 8.5°, above which J c starts to decrease exponentially. This critical angle is almost the same as those of other Fe-based superconductors.
ファイル公開:2020-07-01
IOP publishing
2019-07
eng
journal article
AM
http://hdl.handle.net/2237/00030677
https://nagoya.repo.nii.ac.jp/records/28486
https://doi.org/10.1088/1361-6668/ab1660
0953-2048
Superconductor Science and Technology
32
7
074003
https://nagoya.repo.nii.ac.jp/record/28486/files/Revised_IIDA.pdf
application/pdf
743.9 kB
2020-07-01