Sprungmann, D., Westerholt, K., Zabel, H., Weides, M. and Kohlstedt, H. (2010) Evidence for triplet superconductivity in Josephson junctions with barriers of the ferromagnetic Heusler alloy Cu2MnAl. Physical Review B, 82(6), 060505(R). (doi: 10.1103/PhysRevB.82.060505)
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Abstract
We have studied Josephson junctions with barriers prepared from the Heusler compound Cu 2 MnAl . In the as-prepared state the Cu 2 MnAl layers are nonferromagnetic and the critical Josephson current density j c decreases exponentially with the thickness of the Heusler layers d F . On annealing the junctions at 240 ° C the Heusler layers develop ferromagnetic order and we observe a dependence j c ( d F ) with j c strongly enhanced and weakly thickness dependent in the thickness range 7.0 < d F < 10.6 nm . We interpret this feature as an indication of a triplet component in the superconducting pairing function generated by the specific magnetization profile inside thin Cu 2 MnAl layers.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Weides, Professor Martin |
| Authors: | Sprungmann, D., Westerholt, K., Zabel, H., Weides, M., and Kohlstedt, H. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Physical Review B |
| Publisher: | American Physical Society |
| ISSN: | 1098-0121 |
| ISSN (Online): | 1550-235X |
| Published Online: | 09 August 2010 |
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