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Superconducting properties of binary rare-earth HoREBCO thin films prepared by pulsed layer deposition.

Authors :
Zheng, Tong
Wang, Wei
Liu, Linfei
Liu, Shunfan
Li, Yijie
Source :
Ceramics International. Jul2019, Vol. 45 Issue 10, p13193-13197. 5p.
Publication Year :
2019

Abstract

The superconducting properties of REBa 2 Cu 3 O y (REBCO or RE123, RE = rare earth elements) coated conductors could essentially depend on the rare earth elements, which could be the premise of all potential superconducting applications. In this paper, Ho 0.75 RE 0.25 Ba 2 Cu 3 O 7-σ (HoREBCO, RE = Dy, Er, Yb) high temperature superconducting films were fabricated successfully by a reel-to-reel pulsed laser deposition (PLD) system for the first time. By replacing Ho elements with heavy rare earth elements in a certain mole ratio, the critical currents of the HoREBCO superconducting films were improved significantly compared with pure HoBCO films. The lattice distortions are considered as the determinative factors of the changes. The replacement of Ho atoms by Dy, Er or Yb also influenced the structure and the surface morphology of the superconducting films. The decrease of the lattice constant in HoREBCO superconducting film and the variation of the interatomic force play the decisive role in the improvement of the superconducting property. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02728842
Volume :
45
Issue :
10
Database :
Academic Search Index
Journal :
Ceramics International
Publication Type :
Academic Journal
Accession number :
136272748
Full Text :
https://doi.org/10.1016/j.ceramint.2019.04.001