Bauer, A. and Bentner, J. and Aprili, M. and Della Rocca, M. L. and Reinwald, M. and Wegscheider, Werner and Strunk, Christoph (2004) Spontaneous supercurrent induced by ferromagnetic pi junctions. PHYSICAL REVIEW LETTERS, 92 (21): 217001. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
We present magnetization measurements of mesoscopic superconducting niobium loops containing a ferromagnetic (PdNi) pi junction. The loops are prepared on top of the active area of a micro-Hall sensor based on high mobility GaAs/AlGaAs heterostructures. We observe asymmetric switching of the loop between different magnetization states when reversing the sweep direction of the magnetic field. This provides evidence for a spontaneous current induced by the intrinsic phase shift of the pi junction. In addition, the presence of the spontaneous current near zero applied field is directly revealed by an increase of the magnetic moment with decreasing temperature, which results in half integer flux quantization in the loop at low temperatures.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | JOSEPHSON-JUNCTION; SUPERCONDUCTORS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Christoph Strunk |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 20 Jul 2021 06:10 |
| Last Modified: | 20 Jul 2021 06:10 |
| URI: | https://pred.uni-regensburg.de/id/eprint/37634 |
Actions (login required)
 |
View Item |
