Acremann, Y. and Buess, M. and Back, Christian H. and Dumm, M. and Bayreuther, G. and Pescia, D. (2001) Ultrafast generation of magnetic fields in a Schottky diode. NATURE, 414 (6859). pp. 51-54. ISSN 0028-0836
Full text not available from this repository. (Request a copy)Abstract
For the development of future magnetic data storage technologies, the ultrafast generation of local magnetic fields is essential. Subnanosecond excitation of the magnetic state has so far been achieved by launching current pulses into micro-coils and micro-striplines(1-6) and by using high-energy electron beams(7). Local injection of a spin-polarized current through an all-metal junction has been proposed as an efficient method of switching magnetic elements(8,9), and experiments seem to confirm this(10-13). Spin injection has also been observed in hybrid ferromagnetic-semiconductor structures(14,15). Here we introduce a different scheme for the ultrafast generation of local magnetic fields in such a hybrid structure. The basis of our approach is to optically pump a Schottky diode with a focused, similar to 150-fs laser pulse. The laser pulse generates a current across the semiconductor-metal junction, which in turn gives rise to an in-plane magnetic field. This scheme combines the localization of current injection techniques(11-13,16) with the speed of current generation at a Schottky barrier. Specific advantages include the ability to rapidly create local fields along any in-plane direction anywhere on the sample, the ability to scan the field over many magnetic elements and the ability to tune the magnitude of the field with the diode bias voltage.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MULTILAYER; EXCITATION; INJECTION; REVERSAL; DYNAMICS; FILMS; |
| 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: | 30 Nov 2021 13:19 |
| Last Modified: | 30 Nov 2021 13:19 |
| URI: | https://pred.uni-regensburg.de/id/eprint/40989 |
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