Study on Improvement of Magneto-optical Characteristics of Ferromagnetic Heusler Alloy Films with Artificial Lattice Deposited by Sputtering.

溅射沉积人工晶格改善铁磁霍斯勒合金薄膜磁光特性的研究。

• 批准号: 62460117
• 负责人: NAOE Masahiko
• 金额: $ 4.74万
• 依托单位: Tokyo Institute of Technology.
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62460117/
• 关键词: Magneto-optical Recording Media; Giant Kerr Rotation Angle Materials; Ferromagnetic Heusler Alloy; Artificial Lattice type of Multilayered film; Alternate Deposition Type of Aputtering Method; Plasma-free Film Formation; 対向ターゲット式スパッタ装置; 巨大カー回転能材料 /

Since a PtMnSb heusler alloy with a Clb type of crystal structure is well known to have an extremely large magneto optical Kerr rotation angle K, its magnetic characteristics are interesting theoretically and its thin films are candidates for magneto-optical recording media. Recently, several studies on the preparation of PtMuSb thin films with large K by sputtering and vacuum evaporation have been carrried out.However, they haave not yet had sufficient perpendicular anisotropy to be used for practical applications such as magneto-optical recording media.On the other hand several studies on the possibility of realizing perpendicular anisotropy have been performed. It has been, for example, reported that destinguishable perpendicular anisotropy may be induced in several atomic layers in the vicinity of interfaces of the ferromagnetic layer and non-magnetic layer in multilayered films.In this study, the preparation of Pt/MnSb multilayered films with outstanding perpendicular anisotropy c … More omposed of Pt layers and MnSb ones by using Facing Targets Sputtering apparatus has been attempted and their crystallographic and magnatic characteristics have been investigated in detail.Pt/MnSb multilayered films have been prepared by using a Facing Targets Sputtering apparatus to investigate magnetic characteristics, especially, perpendicular anisotropy of films with large magneto-optical Kerr rotation angle k. Pt layers and MnSb ones were alternately deposited on a glass slideat a substrate temperature off 200゜C. The saturation magnetization Ms and the coercive force Hc of them depend strongly on the ratio in thickness of the Pt layer to bilayer (Pt layer + MnSb layer) thickness. Ms is a maximum of 550゜C emu/cc in annealed films. Some films annealed at 400゜C for 150 minutes in vacuum exhibit significant perpendicular anisotropy. For example, a 2000゜A-thick Pt/MnSb multilayered film composed of 50A-thick MnSb layers and about 13\thick Pt ones had perpendicular anisotropy constant Ku of 4x10^5 erg/cc. Consequently, these films may be excellent candidates used as a new type of magneto-optical recording media with large output signals. Less

由于众所周知具有Clb型晶体结构的PtMnSb Heusler合金具有极大的磁光克尔旋转角K，因此其磁特性在理论上是令人感兴趣的，并且其薄膜是磁光记录介质的候选者。近年来，人们利用溅射法和真空蒸发法制备了具有大K值的PtMuSb薄膜，但其垂直各向异性还不足以用于磁光记录介质等实际应用，另一方面，人们对实现垂直各向异性的可能性进行了研究。例如，在多层膜的铁磁层和非磁性层界面附近的几个原子层中，可以诱导出明显的垂直各向异性，本文研究了具有显著垂直各向异性的Pt/MnSb多层膜的制备方法。 ...更多信息 用对向靶溅射装置制备了Pt/MnSb多层膜，研究了它们的晶体学和磁学特性，用对向靶溅射装置制备了Pt/MnSb多层膜，研究了它们的磁学特性，特别是具有大磁光克尔旋转角k的垂直各向异性。Pt层和MnSb层交替沉积在载玻片上，衬底温度低于200 ℃。它们的饱和磁化强度Ms和矫顽力Hc强烈地依赖于Pt层的厚度与双层（Pt层+ MnSb层）厚度的比率。退火膜的Ms最大值为550 μ C emu/cc。一些薄膜在真空中400 ℃退火150分钟后表现出明显的垂直各向异性。例如，由50埃厚的MnSb层和约13埃厚的Pt层组成的2000埃厚的Pt/MnSb多层膜具有4 × 10^5 erg/cc的垂直各向异性常数Ku。因此，这些膜可能是用作具有大输出信号的新型磁光记录介质的优异候选者。少

项目成果

Masao NAGAKUBO; Tetsuya YAMAMOTO; Masahiko NAOE: "Effects of Hydrogen and Nitrogen Ion Bombardments on Soft Magnetism of Iron Films during Double Ion Beam Sputtering" J. Appl. Phys.63,[8]. 4309-4311 (1988)

长久保正男；

Masahiko NAOE; Nobuyoshi KITAMURA; Masuhiro SHOJI; Masahiko NAOE: "Magneto-optical Properties of PtMnSb Films Prepared by Facing Targets Sputtering" J. Appl. Phys.63,[8]. 3636-3638 (1988)

正彦 NAOE;

Masao,NAGAKUBO: Journal of Applied Physics. 15. 5449-5441 (1988)

长久保正男：应用物理学杂志。

Masahiko NAOE: J.Appl.Phys.63,〔8〕. 3850-3852 (1988)

NAOE 正彦：J.Appl.Phys.63，[8] 3850-3852 (1988)。

Masao Nagakubo;Masahoko Naoe: Proc.of the International Symposium on Physics of Magnetic Materials,. 88-91 (1987)

Masao Nagakubo；Masahoko Naoe：磁性材料物理国际研讨会论文集，。