We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Magnetic Resonance in Metal–Insulator Nanogranular Composites with Paramagnetic Ions in an Insulating Matrix.
- Authors
Drovosekov, A. B.; Kreines, N. M.; Kovalev, O. A.; Sitnikov, A. V.; Nikolaev, S. N.; Rylkov, V. V.
- Abstract
The room-temperature magnetic resonance spectra of metal–insulator (CoFeB)x(LiNbO3)100 –x and (CoFeB)x(Al2O3)100 –x nanogranular composite films with various ferromagnetic metallic phase contents x near the percolation threshold are investigated. The systems under study are characterized by a high concentration of paramagnetic ions dispersed in an insulator matrix between ferromagnetic granules. In addition to a usual ferromagnetic resonance signal, these films are found to exhibit an additional absorption peak in weak fields. In contrast to the usual ferromagnetic resonance excited by a transverse high-frequency magnetic field, the additional peak demonstrates a weak dependence of its amplitude on the resonance excitation geometry. The position of this peak depends on the composition of the system, the resonance excitation frequency (f = 7–38 GHz), and the magnetic field orientation with respect to the film plane. This behavior is associated with the paramagnetic resonance of Fe3+ ions, which are present in the insulator matrix and interact with ferromagnetic granules.
- Subjects
MAGNETIC resonance; PARAMAGNETIC resonance; MAGNETIC fields; IONS; FERROMAGNETIC resonance
- Publication
Journal of Experimental & Theoretical Physics, 2022, Vol 134, Issue 6, p725
- ISSN
1063-7761
- Publication type
Article
- DOI
10.1134/S1063776122060024