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IN-SITU MEASUREMENT SYSTEM OF SURFACE MAGNETO-OPTICAL EFFECT FOR HIGH-DENSITY MAGNETO-OPTICAL RECORDING MEDIA

高密度磁光记录介质表面磁光效应原位测量系统

基本信息

批准号：
07555007
负责人：
IWATA Satoshi
金额：
$ 8.38万
依托单位：
NAGOYA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555007/
关键词：
MAGNETO-OPTICAL RECORDING MAGNETO-OPTICAL EFFECT SURFACE MAGNETISM SURFACE MAGNETIC ANISOTROPY ULTRA-THIN FILM DIELECTRIC TENSOR KERR ROTATION ORDERED ALLOY 反強磁性結合

项目摘要

The preparation system of metallic superlattices and in-situ measurement system of surface magneto-optical effects are constructed and the various magneto-optical materials are investigated by using the systems. In this project, we studied following materials ; (1) Au-Co non-equilibrium alloy films, (2) PtCo ordered alloys with CuPt type, (3) noble metal/Co/noble metal sandwiched films, (4) MnPt_3 ordered alloy films, (Mn_<1-X>Fe_X) Pt_3 and (Mn_<1-X>Co_X) Pt_3 ordered alloy films, (5) MnPt_3/Co and MnPt_3/Copt_3 superlattices and (6) rare earth-transition metal amorphous films. Pt_<50>Co_<50> alloy films were grown by MBE method onto heated MgO (100) and (111) substrates. It is found that the film with CuPt type structure is grown onto (111) substrate at a temperature of 300ﾟC.Whereas, the crystal structure of the films grown onto (111) substrate at 500ﾟC and onto (100) substrate at 300ﾟC and 400ﾟC becomes PtCo ordered phase with AuCu structure. The film of the CuPt type exhibits a very large perpendicular magnetic anisotropy of 1.0*10^6J/m^3, due to the layred structure along the film normal direction. The spectra of Kerr rotation rheta_k of the film with CuPt structure is considerably different from that of AuCu structure, which does not exhibit a maximum around 4.0eV but takes a peak at 1.4eV.

构建了金属超晶格的制备系统和表面磁光效应的原位测量系统，并利用该系统对各种磁光材料进行了研究。在这个项目中，我们研究了以下材料：(1) Au-Co非平衡合金膜，(2)CuPt型PtCo有序合金膜，(3)贵金属/Co/贵金属夹层膜，(4)MnPt_3有序合金膜，（Mn_<1- x >Fe_X） Pt_3和（Mn_<1- x >Co_X） Pt_3有序合金膜，(5)MnPt_3/Co和MnPt_3/Copt_3超晶格，(6)稀土过渡金属非晶态膜。采用MBE法在加热的MgO（100）和MgO（111）衬底上生长了Pt_<50>Co_<50>合金薄膜。结果表明，在300℃的温度下，薄膜在（111）衬底上生长出CuPt型结构。而在（111）衬底和（100）衬底上生长的薄膜在300、400、500个价位时，其晶体结构为具有AuCu结构的PtCo有序相。CuPt型薄膜由于沿膜法向呈层状结构，具有非常大的垂直磁各向异性，为1.0 × 10^6J/m^3。CuPt结构薄膜的Kerr旋转rheta_k光谱与AuCu结构薄膜有很大的不同，在4.0eV附近没有最大值，而在1.4eV处有一个峰值。