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.

磁置型lambda_ <100>估计了[111]方向的多晶PDCO和PTCO合金膜和PTCO合金膜和多元型ILMS（MLS），从而发现了PD/CO和PT/CO ML的MANGETRICTION。在接口处的电子杂交和/或合金形成的FCC CO的MAGNETO -STRICATIC KERR滞后环和能量谱测量用于超出的CO膜中的co -kerr旋转。那些根据CO厚度降低的大量数据与计算的频谱形状不同。 /通过RF溅射方法制备的FECO多层。

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。