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Growth of magnesium diboride films on 2 inch diameter copper discs by hybrid physical–chemical vapor deposition.
- Source :
-
Superconductor Science & Technology . Apr2017, Vol. 30 Issue 4, p1-1. 1p. - Publication Year :
- 2017
-
Abstract
- Magnesium diboride (MgB2) coating is a potential candidate to replace bulk niobium (Nb) for superconducting radio frequency cavities due to the appealing superconducting properties of MgB2. MgB2 coating on copper may allow cavity operation near 20–25 K as a result of the high transition temperature (Tc) of MgB2 and excellent thermal conductivity of Cu. We have grown MgB2 films on 2 inch diameter Cu discs by hybrid physical–chemical vapor deposition for radio frequency characterization. Structural and elemental analyses showed a uniform MgB2 coating on top of a Mg–Cu alloy layer with occasional intrusion of Mg–Cu alloy regions. High Tc values of around 37 K and high critical current density (Jc) on the order of 107 A cm−2 at zero field were observed. Radio frequency measurements at 11.4 GHz confirmed a high Tc and showed a quality factor (Q0) much higher than for Cu and close to that of Nb. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MAGNESIUM diboride
*CHEMICAL vapor deposition
*NIOBIUM
Subjects
Details
- Language :
- English
- ISSN :
- 09532048
- Volume :
- 30
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Superconductor Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 121757717
- Full Text :
- https://doi.org/10.1088/1361-6668/aa5999