| dc.creator |
Malisa, Anayesu B. |
|
| dc.creator |
Valkeapää, M. |
|
| dc.creator |
Johansson, L. -G |
|
| dc.creator |
Ivanov, Zdravko |
|
| dc.date |
2016-09-21T13:56:59Z |
|
| dc.date |
2016-09-21T13:56:59Z |
|
| dc.date |
2004-03 |
|
| dc.date.accessioned |
2018-03-27T09:01:29Z |
|
| dc.date.available |
2018-03-27T09:01:29Z |
|
| dc.identifier |
Malisa, A., Valkeapää, M., Johansson, L.G. and Ivanov, Z., 2004. Josephson junctions fabricated by focused ion beam from ex situ grown MgB 2 thin films. Physica C: Superconductivity, 405(1), pp.84-88. |
|
| dc.identifier |
http://hdl.handle.net/20.500.11810/3997 |
|
| dc.identifier |
org/10.1016/j.physc.2004.01.017 |
|
| dc.identifier.uri |
http://hdl.handle.net/20.500.11810/3997 |
|
| dc.description |
Full text can be accessed at
http://www.sciencedirect.com/science/article/pii/S0921453404000978 |
|
| dc.description |
We prepared MgB2 thin films on SrTiO3 (1 0 0) and Al2O3 (1 1̄ 0 2) substrates by e-beam evaporation of MgB2 pellet. The films were deposited at room temperature and post-annealed at 900 °C in Mg vapour for 5–30 min. Superconducting transition temperatures were observed between 22 and 30 K. Structure and surface morphology of the films were investigated by X-ray diffraction (XRD) and atomic force microscopy (AFM). The films grown on Al2O3 substrates are c-axis oriented while a film grown on SrTiO3 substrate is aligned with the (1 0 1) direction normal to the substrate planes. The films have grain sizes of about 70 nm. The films were patterned into 4 and 8 μm wide microbridges. The microbridges were observed to carry large critical current densities of approximately 1 MA/cm2 at 6.7 K. Focused ion beam (FIB) was used on the bridges in order to fabricate Josephson junctions. A cut 50 nm in width was made across the microbridges followed by an in situ platinum (Pt) deposition into the cut made. SNS-like weak-link junctions were formed in the process. |
|
| dc.language |
en |
|
| dc.subject |
Superconducting |
|
| dc.subject |
MgB2 |
|
| dc.subject |
Thin films |
|
| dc.subject |
Ex situ |
|
| dc.subject |
E-beam evaporation |
|
| dc.title |
Josephson Junctions Fabricated by Focused Ion Beam from Ex Situ Grown MgB2 Thin Films |
|
| dc.type |
Journal Article |
|