A1 Refereed original research article in a scientific journal
Reason for high critical current in thin YBCO films prepared by laser ablation from nanostructured target
Authors: Paturi P, Huhtinen H, Laajalehto K, Laiho R
Publisher: IOP PUBLISHING LTD
Publication year: 2000
Journal:: Superconductor Science and Technology
Journal name in source: SUPERCONDUCTOR SCIENCE & TECHNOLOGY
Journal acronym: SUPERCOND SCI TECH
Volume: 13
Issue: 5
First page : 622
Last page: 628
Number of pages: 7
ISSN: 0953-2048
DOI: https://doi.org/10.1088/0953-2048/13/5/336
Abstract
Thin YBCO films prepared by laser ablation from a nanocrystalline target have a high critical current density J(c) approximate to 10(7) A cm(-2) at 77 K. To clarify the reason for the high value of J(c), the composition and structure of these films are compared with those deposited from a typical coarse-grained target. According to energy-dispersive x-ray and photoelectron spectroscopic analysis the contents of Y, Pa and Cu are similar in the films of both origins, despite some differences in the compositions of the targets. It is concluded that the high value of J(c) in the films prepared from the nanocrystalline target can be explained by pinning of magnetic Bur vortices to extended structural defects.
Thin YBCO films prepared by laser ablation from a nanocrystalline target have a high critical current density J(c) approximate to 10(7) A cm(-2) at 77 K. To clarify the reason for the high value of J(c), the composition and structure of these films are compared with those deposited from a typical coarse-grained target. According to energy-dispersive x-ray and photoelectron spectroscopic analysis the contents of Y, Pa and Cu are similar in the films of both origins, despite some differences in the compositions of the targets. It is concluded that the high value of J(c) in the films prepared from the nanocrystalline target can be explained by pinning of magnetic Bur vortices to extended structural defects.
UTU Research Portal