Research of Ultra High Density Magneto-optical Recording Material

超高密度磁光记录材料的研究

• 批准号: 04452173
• 负责人: UCHIYAMA Susumu
• 金额: $ 4.16万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04452173/
• 关键词: Magneto-optics; Super Lattice; Magnetic Anisotropy; Multilayr; Magneto-striction; Exchange-coupling; 磁歪; 磁性多層膜; 磁気弾性異方性; 磁歪定数

Magnetostriciton constants lambda_<111> and lambda_<100> were estimated for [111] oriented polycrystalline PdCo and PtCo alloy films and multilayr films (MLs) from the induced anisotropy. It was found that the mangetostriction constants of Pd/Co and Pt/Co MLs are not determined by the mangetostriction constants of fcc Co, but are strongly affected by those of PdCo and PtCo alloys. This result implies the effect of electron hybridization and/or alloy formation at the interface.Magneto-optical Kerr hysteresis loops and their energy spectra are measured for ultrathin Co films. In Au/20 A Co/Au sandwiches, the spectra shape of the Kerr rotation as well as the Kerr ellipticity agrees with those calculated from bulk data. With decreasing Co thickness, the spectral shape becomes different from the calculated one. The imaginary prot of off-diagonal conductivity was also estimated for ultrathin Co films.Magnetic and magnetooptic properties have been investigated for NdGd/Fe and NdGd/FeCo multilayrs prepared by rf sputtering method. At a bilayr period of 10 to 15 A, perpendicular magnetic anisotropy showed the maximum value of about 2.5 X 10^6 erg/cm^3. Magnetooptic Kerr rotation of the multilayrs reach 0.33ﾟ at 400 nm, reflecting the contribution of Nd.

MagnEtostriction常数Lambda_ <111>和Lambda_ <100>估计了[111]面向多晶PDCO和PTCO合金膜和PTCO合金膜和多层膜（MLS）的含量。发现PD/CO和PT/COMLS的Mangetostriction常数不是由FCC CO的Mangetostriction常数确定的，而是受PDCO和PTCO合金的强烈影响。该结果意味着在接口处电子杂交和/或合金形成的作用。MAGNETO-KERR KERR磁滞回路及其能量光谱是针对超薄CO膜测量的。在AU/20 A CO/AU三明治中，Kerr旋转的光谱形状以及Kerr椭圆度与根据大量数据计算的那些相符。随着CO厚度的减小，光谱形状与计算出的形状不同。还估计了对超薄CO膜的非对角电导率的假想蛋白。已研究了通过RF溅射方法制备的NDGD/FE和NDGD/FECO Multilayrs的磁性和磁性特性。在10至15 a的Bilayr周期，垂直磁各向异性显示的最大值约为2.5 x 10^6 erg/cm^3。多层的磁置kerr旋转在400 nm时达到0.33°，反映了ND的贡献。

项目成果

H.Takahashi: "Measurement of Magnetostriction Constants in(111)-Oriented Polycrystalline PdCo Alloy and Multilayered Films" Jpn.J.Appl.Phys.32. L1328-L1331 (1993)

H.Takahashi：“（111）取向多晶 PdCo 合金和多层薄膜中磁致伸缩常数的测量”Jpn.J.Appl.Phys.32。

X.Y.Yu, H.Watabe, S.Iwata, S.Tsunashima, S.Uchiyama, R.Gerber: ""Magnet-Optic Kerr Rotation of Rare Earth-Iron Based Alloys"" Mat.Res.Soc.Symp.Proc.(1993)

X.Y.Yu、H.Watabe、S.Iwata、S.Tsunashima、S.Uchiyama、R.Gerber：“稀土铁基合金的磁光克尔旋转”Mat.Res.Soc.Symp.Proc.（

A.Yamaguchi: "Magneto-Optical Effect of Ultrathin Co Films" J.Magn.& Magn.Mat.121. 542-544 (1993)

A.Yamaguchi：“超薄钴薄膜的磁光效应”J.Magn。

A.Yamaguchi(4名): "Magneto-optical effect of ultra thin Co films" J.Magnetism and Magneticmaterials,to be published. (1993)

A.山口（4人）：《超薄Co薄膜的磁光效应》J.Magnetism and Magnetic Materials，待出版（1993年）。

X.Y.Yu, S.Tsunashima, S.Uchiyama: ""Magnet-Optic Properties of (Nd, Pr)Gd/FeCo Multilayrs"" J.Magn.Soc.Jpn.Vol.16, No.3. 547-550 (1992)

X.Y.Yu、S.Tsunashima、S.Uchiyama：“(Nd, Pr)Gd/FeCo 多层膜的磁光特性”J.Magn.Soc.Jpn.Vol.16，No.3。