A Method to Fabricate Biaxially Textured MgO Buffer Layer for HTS Coated Conductor

In this paper, a radio-frequency magnetron sputtering system without any assisting ion source was employed to fabricate biaxially textured MgO films on the substrates of amorphous Y 2 O 3 /Al 2 O 3 /Hastelloy stacks. During the deposition process, the growing MgO film was bombarded by an off-normal...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2016-04, Vol.26 (3), p.1-5
Main Authors: Xiao, Shaozhu, Feng, Feng, Qu, Timing, Lu, Hongyuan, Zhang, Xiangsong, Han, Zhenghe
Format: Article
Language:English
Subjects:
Alloys
Amorphous magnetic materials
biaxial texture
Buffer layers
Coating
Conductors (devices)
Deposition
Epitaxial growth
in-plane orientation
Magnesium oxide
magnetron sputtering
Nickel base alloys
Sputtering
Substrates
Superalloys
Superconducting magnets
Superconductivity
Surface layer
Texture
X-ray scattering
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, a radio-frequency magnetron sputtering system without any assisting ion source was employed to fabricate biaxially textured MgO films on the substrates of amorphous Y 2 O 3 /Al 2 O 3 /Hastelloy stacks. During the deposition process, the growing MgO film was bombarded by an off-normal energetic particle flux mainly composed of oxygen atoms and negative oxygen ions, which originated from the target surface. MgO obtained a biaxial texture due to such bombardment; thus, this method is named energetic particle self-assist deposition (EPSAD). The texture of EPSAD-MgO films was evaluated via the X-ray diffraction measurement of the postdeposited homoepitaxial MgO layers. An out-of-plane orientation of MgO(111) and a three-fold symmetric in-plane alignment were observed. The MgO texture was optimal when the EPSAD-MgO thickness was about 10 nm. The formation of biaxial texture during the EPSAD process was verified by a control study, and the influences of targetinclined angle and target-substrate distance were also investigated. Furthermore, the mechanism of the EPSAD-MgO method was compared with those of the inclined substrate deposition and ion beam assisted deposition. This study proposed a new method to fabricate a biaxially textured MgO buffer layer for high temperature superconducting (HTS) coated conductors. More optimization research will be conducted in our future study.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2016.2532960