NdTbCo/Cr amorphous films with high perpendicular magnetic anisotropy were prepared onto glass substrates by rf magnetron sputtering. The effects of Nd substitution on the magnetic and magneto-optical properties of Tb...NdTbCo/Cr amorphous films with high perpendicular magnetic anisotropy were prepared onto glass substrates by rf magnetron sputtering. The effects of Nd substitution on the magnetic and magneto-optical properties of TbCo/Cr films were investigated. It was found that partial Tb substitution by Nd would increase the saturation magnetization and the Kerr rotation angle, change the temperature dependence of magneto-optical characteristics. These results can be explained by the ferrimagnetic structure of the rare earth-transition metal alloy. When the magnetic layer composition was （Nd0.265Tb0.735）31Co69, a saturation magnetization of 247 emu/cm^3 and a coercivity of 3.8 kOe at room temperature could be obtained.展开更多
The GdFeCo and NdGdFeCo thin films were prepared by sputtering, and their hysteresis loops, the temperature dependence of the saturation magnetization Ms and the magneto-optical Kerr spectrum in the visible light rang...The GdFeCo and NdGdFeCo thin films were prepared by sputtering, and their hysteresis loops, the temperature dependence of the saturation magnetization Ms and the magneto-optical Kerr spectrum in the visible light range were measured. By studying the effects of light rare earth element Nd doping on the magneto-optical Kerr rotation angle of GdFeCo thin films, it is found that proper Nd additives in GdFeCo films could enhance Kerr rotation at short wavelengths. So it could be better medium used as the readout layer of center aperture detection magnetically induced super resolution （CAD-MSR）.展开更多
The propagation properties of linearly polarized light in reflection・type one-dimensional magnetoph tonic crystals are studied by using the 4×4 transmission matrix method.The structure models of reflectiotype one...The propagation properties of linearly polarized light in reflection・type one-dimensional magnetoph tonic crystals are studied by using the 4×4 transmission matrix method.The structure models of reflectiotype one-dimensional magnetophotonic crystals are designed,the magnetic field direction control characteristics of reflection spectrum and Kerr rotation angle are discussed,and the effect of applied magnetic field direction and strength on reflection spectrum and Kerr rotation angle are analyzed.The results show that the non-diagonal elements in the dielectric constant of magneto optical materials change when the angle φ between applied magnetic field and optical path changes,the reflectivity and Kerr rotation angle decrease when the angle φ increases;when the applied magnetic field strength changes,the reflectivity and Kerr rotation angle increase when the applied magnetic field strength increases;by adjusting the angleφ and strength of the applied magnetic field,the rotation angle of Kerr can be adjusted to 45°,and a more flat reflection spectrum can be obtained by designing the appropriate structure.展开更多
基金the Major Project of National Natural Science Foundation of China(No.60490290)the National Natural Science Foundation of China(No.60571010)
文摘NdTbCo/Cr amorphous films with high perpendicular magnetic anisotropy were prepared onto glass substrates by rf magnetron sputtering. The effects of Nd substitution on the magnetic and magneto-optical properties of TbCo/Cr films were investigated. It was found that partial Tb substitution by Nd would increase the saturation magnetization and the Kerr rotation angle, change the temperature dependence of magneto-optical characteristics. These results can be explained by the ferrimagnetic structure of the rare earth-transition metal alloy. When the magnetic layer composition was （Nd0.265Tb0.735）31Co69, a saturation magnetization of 247 emu/cm^3 and a coercivity of 3.8 kOe at room temperature could be obtained.
文摘The GdFeCo and NdGdFeCo thin films were prepared by sputtering, and their hysteresis loops, the temperature dependence of the saturation magnetization Ms and the magneto-optical Kerr spectrum in the visible light range were measured. By studying the effects of light rare earth element Nd doping on the magneto-optical Kerr rotation angle of GdFeCo thin films, it is found that proper Nd additives in GdFeCo films could enhance Kerr rotation at short wavelengths. So it could be better medium used as the readout layer of center aperture detection magnetically induced super resolution （CAD-MSR）.
基金This work was supported by the National Natural Science Foundation of China(Grant No.61765003).
文摘The propagation properties of linearly polarized light in reflection・type one-dimensional magnetoph tonic crystals are studied by using the 4×4 transmission matrix method.The structure models of reflectiotype one-dimensional magnetophotonic crystals are designed,the magnetic field direction control characteristics of reflection spectrum and Kerr rotation angle are discussed,and the effect of applied magnetic field direction and strength on reflection spectrum and Kerr rotation angle are analyzed.The results show that the non-diagonal elements in the dielectric constant of magneto optical materials change when the angle φ between applied magnetic field and optical path changes,the reflectivity and Kerr rotation angle decrease when the angle φ increases;when the applied magnetic field strength changes,the reflectivity and Kerr rotation angle increase when the applied magnetic field strength increases;by adjusting the angleφ and strength of the applied magnetic field,the rotation angle of Kerr can be adjusted to 45°,and a more flat reflection spectrum can be obtained by designing the appropriate structure.
