Exchange interaction in Co/Bi/Co thin-film systems with Bi interlayer
| Autor: | A.M. Kharlamova, Andrey V. Svalov, Galina V. Kurlyandskaya, Elena E. Shalygina |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Kerr effect
Materials science Condensed matter physics Exchange interaction Fermi energy 02 engineering and technology Coercivity 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Spectral line Electronic Optical and Magnetic Materials 0103 physical sciences Thin film 010306 general physics 0210 nano-technology Electronic band structure Saturation (magnetic) |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 440:136-139 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2016.12.144 |
| Popis: | The magneto-optical and magnetic properties of Co(5 nm)/Bi/Co(5 nm) samples and the peculiarities of exchange coupling between Co layers through the Bi spacer layer are studied. The magneto-optical investigations indicate that the shapes of Transverse Kerr effect (TKE) spectra are similar for all studied samples but the TKE values decrease at tBi >4 nm as compared with TKE values of the single-layer Co thin film. The decrease in the volume ratio of the magnetic to nonmagnetic phases causes the reduction of the contribution of the magnetic phase to magnetooptical signals. Magnetic investigations show that the coercivity force, HC, and saturation field, HS, of the Co/Bi/Co samples increase with increasing tBi. The oscillatory behavior of HC and HS with various periods (short and long) is observed in a wide range of tBi values (from 0.2 to 50 nm). These data are explained by the dependence of Fermi energy on tBi and the changes in the Bi band structure with decreasing tBi. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect