| Autor: |
Dyakonov, V., Shapovalov, V., Zubov, E., Aleshkevych, P., Klimov, A., Varyukhin, V., Pashchenko, V., Kamenev, V., Mikhailov, V., Dyakonov, K., Popov, V., Lewandowski, S. J., Berkowski, M., Zuberek, R., Szewczyk, A., Szymczak, H. |
| Předmět: |
|
| Zdroj: |
Journal of Applied Physics; 2/15/2003, Vol. 93 Issue 4, p2100, 7p, 2 Charts, 7 Graphs |
| Abstrakt: |
Measurements of ferromagnetic resonance (FMR) in both in-plane (H[sub ]) and out-of-plane (H[sub ⊥]) magnetic field configurations have been performed on a series of epitaxial (La[sub 0.7]Ca[sub 0.3])[sub 1-x]Mn[sub 1+x]O[sub 3] films. The FMR linewidths have a local maximum near the Curie point and increase continuously at low temperatures. The effective anisotropy of the films has the easy-plane character. The angular dependences of H[sub res] were found to be in reasonable agreement with the theoretical ones, taking into account the second- and fourth-order terms of the magnetic anisotropy energy. A reasonable agreement between δH[sub res](α) and Bloch type dissipation was obtained only for deviations of the external field from the normal to the film plane up to α = 20°. From the temperature and angular dependences of the FMR spectra, the main magnetic parameters such as the effective magnetization, effective field H[sub eff], anisotropy field H[sub A2], and FMR linewidth were estimated. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
