Effect Of The Addition Of Light And Middling Rare-Earth On The Magneto-Optical Property Of TbFeCo Material

Magneto-optical recording is a prosperous new field in Information memory. The progress of magneto-optical recording technology is much significance for the require of high capacity, density and erasable property. But when concerned with higher magneto-optical recording density, the Kerr angle become smaller at shorter wavelength than at longer wavelength result from recoding and reading the memory information by shorter wavelength semiconductor laser tube. Further more the Signal-to-Noise of recording information lowers and brings difficulty for the reading. In this paper we put fonvard the method of introducing the light and middling lanthanon into the Tb-Fe-Co magneto-optical materials by taking advantage of the higher saturation magnetization intensity, higher anisotropy and higher magneto-optical effect of light and middling rare-earth. Moreover the law and mechanism of how the addition afFect the magneto-optical property of the films were discussed. And the dopping magneto-optical materials were constructed to better meet the demand for the properties of magneto-optical disk recording media materials, forming the series magneto-optical recording media materials and decreasing the making cost by the method of introducing the light and middling rare-earth into The TbFeCo materials. The magneto-optical properties and compositions of the Tb-Fe-Co series dopping magnetic-optical film materials were investigated. The results show that when small amount of adulteration element was introduced into the Tb-Fe-Co, the magneto-optical properties of materials are increased .For example the Kerr angle and the coercive force are both improved. But the amount of adulteration element must be strictly controlled. The average amount is about ten atoms.