Magnetooptical study of granular silicon oxide films with embedded CoNbTa ferromagnetic particles

A.V. Kimel (1) , R.V. Pisarev (1) , A.A. Rzhevskiy (1) , U.E. Kalinin (2) , A.V. Sitnikov (2) , O.V. Stogney (2) , F. Bentivegna (3) , Th. Rasing (4)

1 A.F. Ioffe Physical-Technical Institute
2 Voronezh State University
3 Department of Environmental Science [Radboud Universiteit Nijmegen, Netherlands]
4 Institute for Molecules and Materials

Granular silicon oxide films with embedded CoNbTa ferromagnetic particles and different relative contents of the metal and dielectric phases were studied using both steady-state and dynamic magnetooptical techniques with subpicosecond time resolution. Measurements were conducted in the spectral interval from 1.45 to 1.70 eV. The concentration dependences of the linear and photoinduced Kerr effects were found to behave similarly. Both relations are nonmonotonic with a maximum lying near the percolation threshold.

Domaines: Physique [physics]

A.V. Kimel, R.V. Pisarev, A.A. Rzhevskiy, U.E. Kalinin, A.V. Sitnikov, et al.. Magnetooptical study of granular silicon oxide films with embedded CoNbTa ferromagnetic particles. Physics of the Solid State, 2003, 45 (2), pp.283. ⟨hal-01126797⟩