NDLI: MgB$_{2}$ Thin Films on Metal Substrates for Superconducting RF Cavity Applications

Content Provider	Springer Nature Link
Author	Zhuang, Chenggang Tan, Teng Krick, Alex Lei, Qingyu Chen, Ke Xi, X. X.
Copyright Year	2013
Abstract	Magnesium diboride is a promising material for superconducting RF (SRF) cavity applications. Compared to the currently used superconductor for SRF cavities Nb, MgB$_{2}$ has the potential to achieve lower RF loss and higher acceleration field due to its higher critical temperature and thermodynamic critical magnetic field. Since the RF field only penetrates a few penetration depths into a superconductor, a superconducting coating of several hundred nanometers on a metal cavity is sufficient for superb SRF cavity performances. In this work, we report the properties of MgB$_{2}$ thin films deposited by the hybrid physical–chemical vapor deposition (HPCVD) technique on different metal substrates including Nb, Mo, Ta, and stainless steel. All the films were polycrystalline, as indicated by X-ray diffractometry and scanning electron microscopy, and showed T $_{ c }$∼39 K, determined by resistance versus temperature, magnetic susceptibility, and dielectric resonator measurements. MgB$_{2}$ films deposited on Nb substrates polished to various degrees of smoothness exhibit similar T $_{ c }$. The result is a promising step in the investigation of using MgB$_{2}$ as an alternative to Nb for SRF cavities.
Starting Page	1563
Ending Page	1568
Page Count	6
File Format	PDF
ISSN	15571939
Journal	Journal of Superconductivity and Novel Magnetism
Volume Number	26
Issue Number	5
e-ISSN	15571947
Language	English
Publisher	Springer US
Publisher Date	2013-01-05
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Superconducting RF cavity Magnesium diboride HPCVD Metal substrates Strongly Correlated Systems, Superconductivity Magnetism, Magnetic Materials Condensed Matter Physics Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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