Modification of Magnetic Properties of a CoPt Alloy by Ion Irradiation
Abstract
The effect of ion irradiation on magnetic properties of films of the ferromagnetic CoPt alloy fabricated by electron-beam evaporation has been studied. It is found that the coercive force decreases and the lateral component of the easy-magnetization axis increases as the He+ ion fluence increases from 1 × 1013 to 1 × 1016 cm-2. It is shown by magnetic-force microscopy and the Mandelstam-Brillouin spectroscopy that the formation of isolated circle domains which are magnetic skirmions in the CoPt layer is activated at certain ion-irradiation fluence (3 × 1014 cm-2).
- Publication:
-
Physics of the Solid State
- Pub Date:
- September 2019
- DOI:
- 10.1134/S1063783419090105
- Bibcode:
- 2019PhSS...61.1646K
- Keywords:
-
- electron-beam evaporation;
- ferromagnetic alloy;
- ion irradiation;
- isolated circle domains