Penetration depth of MgB2 measured using Josephson junctions and SQUIDs
Abstract
The penetration depth of MgB2 was measured using two methods of different mechanisms. The first method used MgB2 Josephson junctions and the magnetic field dependence of the junction critical current. The second method deduced the penetration depth from the inductance of a MgB2 microstrip used to modulate the voltage of a MgB2 DC SQUID. The two methods showed a consistent value of the low-temperature penetration depth for MgB2 to be about 40 nm. Both the small penetration depth value and its temperature dependence are in agreement with a microscopic theory for MgB2 in the clean limit.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 18, 2013
- Source ID
- 10.1063/1.4793194
Entities
People
- Chenggang Zhuang
- Daniel Cunnane
- Jie Yong
- Ke Chen
- T. R. Lemberger
- X. X. Xi
Organizations
- Office of Naval Research
- Ohio State University
- Temple University