Gangwar, Ajay and Bauer, Hans G. and Chauleau, Jean-Yves and Noske, Matthias and Weigand, Markus and Stoll, Hermann and Schuetz, Gisela and Back, Christian H. (2015) Electrical determination of vortex state in submicron magnetic elements. PHYSICAL REVIEW B, 91 (9): 094407. ISSN 1098-0121, 1550-235X
Full text not available from this repository.Abstract
We have studied vortex dynamics excited by the spin-transfer-torque effect and find that the direction of the vortex state can be detected electrically using the homodyne voltage signal generated due to the anisotropic magnetoresistance (AMR) effect. An external in-plane dc magnetic field is required to break the cylindrical symmetry in order to obtain a dc response of the homodyne signal. The sign of this rectified voltage changes with the handedness of the vortex state, which makes it a promising method to detect the vortex state electrically. Vortex dynamics is also observed by direct imaging in a scanning transmission x-ray microscope, allowing verification of the measured AMR signal in the correct power and frequency range. The results of micromagnetic simulations are in good agreement with the experimental data.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CORE REVERSAL; DOMAIN-WALL; DYNAMICS; NANODISKS; MOTION; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Christian Back |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 22 Jul 2019 14:12 |
| Last Modified: | 22 Jul 2019 14:12 |
| URI: | https://pred.uni-regensburg.de/id/eprint/5795 |
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