研究目的
Investigating the optical and magneto-optical properties of multilayer nanosized [Co/TiO2]n films prepared on a silicon substrate by ion-beam deposition.
研究成果
The nanosized [Co/TiO2]n structures exhibit strong magnetic and optical anisotropy at room temperature, making them suitable for applications in nanospintronics and integral optoelectronics. The structures can be considered as artificial optically uniaxial media.
研究不足
The study is limited to the specific [Co/TiO2]n structures prepared by ion-beam deposition on silicon substrates. The optical and magneto-optical properties may vary with different preparation methods or substrates.
1：Experimental Design and Method Selection:
The study involved the preparation of [Co/TiO2]n structures by ion-beam deposition and the measurement of their optical and magneto-optical properties using ellipsometry and polarimetric techniques.
2：Sample Selection and Data Sources:
Samples were prepared with different thicknesses of Co and TiO2 layers, and their properties were measured in the spectral ranges of 0.6–5.6 eV for optical properties and 1.2–4.5 eV for magneto-optical properties.
3：6–6 eV for optical properties and 2–5 eV for magneto-optical properties.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: A V-VASE? (J.A. Woollam) reflection ellipsometer was used for optical measurements. The samples were prepared on silicon substrates using ion-beam deposition.
4：Experimental Procedures and Operational Workflow:
The optical properties were measured using ellipsometry, and the magneto-optical Kerr effect was measured in polar and longitudinal geometries. The magnetic anisotropy type was determined from the field dependences of the Kerr effect.
5：Data Analysis Methods:
The complex permittivity was analyzed using optical reflection matrices and the method of anisotropic effective medium. The magneto-optical properties were analyzed based on the permittivity tensor.
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