28 October 2003 Second harmonic generation studies of magnetic nanogranular films exhibiting giant magnetoresistance
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Abstract
Nonlinear optical properties of granular magnetoresistive films are studied by second harmonic generation (SHG) technique and nonlinear magneto-optical Kerr effect (NOMOKE). For different types of granular structures - magnetic nanoparticles in non-magnetic metallic (Co-Cu) or in a dielectric host material (CoFe-Al2O3), a clear correlation between GMR and NOMOKE is observed, which manifests itself in the appearance of a local maximum in both the GMR and NOMOKE for the same concentration range of magnetic metal prior to the percolation threshold. This correlation apparently occurs on the macroscopic level due to the similar influence of the nanogranules structure on surface magnetization of granules which determines NOMOKE, and spindependent conductivity of the films.
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Tatyana V. Murzina, Tatyana V. Murzina, F. F. Kravets, F. F. Kravets, Timur V. Misuryaev, Timur V. Misuryaev, Oleg A. Aktsipetrov, Oleg A. Aktsipetrov, } "Second harmonic generation studies of magnetic nanogranular films exhibiting giant magnetoresistance", Proc. SPIE 5221, Plasmonics: Metallic Nanostructures and Their Optical Properties, (28 October 2003); doi: 10.1117/12.505217; https://doi.org/10.1117/12.505217
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