Magnetic Properties of Artificial Super Lattice and its Application for magneto-optical Recording Media

人工超晶格的磁性能及其在磁光记录介质中的应用

基本信息

批准号：
01460139
负责人：
UCHIYAMA Susumu
金额：
$ 4.35万
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：
1989
资助国家：
日本
起止时间：
1989 至 1991
项目状态：
已结题

项目摘要

Artificially superstructured as well as compositonally modulated multilayers show often enhanced magnetic anisotropy with the easy axis perpendicular to the film plane, and this anisotropy is very attractive in applications such as magnetic and magneto-optic recording. In this research, we have investigated magnetic properties in two type of multilayers, one is noble metal (Nm) /transition metal (TM) multilayer, the other is rareearth (RE) /transition metal containing light RE, which have advantage to magnetooptic Kerr effect at short wavelength compared with usial TbFeCo alloy.I. NM/TM multilayersMultilayers consists of NM (Pd, Pt, Cu, Au, PdSi) and TM (Co, Ni, PdCo, PtCo, CoZr) layers were prepared by rf sputtering method on glass and/or MgO single crystal substrates. The perpendicular magnetic anisotropy was examined in relation to the magnetostriction, lattice misfits, crystanity and crystal orientations. The results suggest that the perpendicular magnetic anisotropy in NM/PdCo-alloy multilayers originates from the magnetoelastic energy of the PdCo layers under a stress due to the lattice misfits. In both Pd/Co and Pd/Ni multilayers, the anisotropy, was found to depend on the crystal orientation, and the dependence could be attributed to the anisotropic magnetostriction constants of these alloys.II. RE/TM multilayersMagnetic and magneto-optic properties have been investigated for NdGd/Fe and NdGd/FeCo multilayers prepared by rf sputtering method. At bilayer period of 10 to 15 A, perpendicular magnetic anisotropy showed the maximum value of about 2.5 X 10^6 erg/cm^3, magneto-optic Kerr rotation in the multilayers reach 0.33 at 400 nm, reflecting the contribution of Nd.

人为上的上层结构和综合调制的多层表现出的磁各向异性通常具有垂直于膜平面的易于轴，并且这种各向异性在诸如磁性和磁光记录之类的应用中非常有吸引力。在这项研究中，我们已经研究了两种类型的多层磁性能，一种是高贵金属（NM） /过渡金属（TM）多层，另一个是包含光RE的稀有性（RE） /过渡金属，与使用USIAL TBFECO ALLOY.I相比，在短波长下具有磁置Kerr效应。 NM/TM多层变量包括NM（PD，PT，Cu，Au，PDSI）和TM（CO，NI，PDCO，PTCO，PTCO，COZR）层由RF溅射方法上的玻璃和/或MGO单晶基质组成。垂直磁各向异性研究了磁结构，晶格失调，晶体和晶体方向。结果表明，NM/PDCO合金多层中的垂直磁各向异性源自PDCO层的磁弹性能，这是由于晶格不合适引起的。在PD/CO和PD/Ni多层中，各向异性都被发现取决于晶体方向，并且依赖性可以归因于这些合金的各向异性磁曲线常数。 RE/TM多层磁性和磁化特性已针对通过RF溅射方法制备的NDGD/FE和NDGD/FECO多层。在10至15 a的双层周期时，垂直磁各向异性的最大值约为2.5 x 10^6 erg/cm^3，多层中的磁性kerr旋转在400 nm时达到0.33，反映了ND的贡献。