Co-Pt nano-composite perpendicular magnetic recording media aiming at 500 Gbit/in^2 and beyond
面向500 Gbit/in^2及以上的Co-Pt纳米复合垂直磁记录介质
基本信息
- 批准号:17510104
- 负责人:
- 金额:$ 1.98万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2005
- 资助国家:日本
- 起止时间:2005 至 2006
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
A Co-Pt-oxide film for high density magnetic recording media is proposed aiming at 500 Gbit/in^2 and beyond. The media are required to posses many characteristics such as (a) nano-composite structure with magnetically isolated grain structure for low noise property, (b) nano-size crystal grains with uniform size distribution for high resolution and (c) large magnetic anisotropy energy for thermal stability of the recorded bits. Some ideas for resolving the requirements are proposed as listed below, (1) a Co-Pt film with large magnetic anisotropy energy is adopted for storage layer, (2) a composite structure of the Co-Pt film with an oxide material is used and a TiO_2 is proposed as a superior oxide material and (3) a stacked structure with high Ar gas pressure deposited Co-Pt film and Co-Pt-TiO_2 with magnetically isolated structure is proposed.A large magnetic anisotropy of the Co-Pt film was obtained by optimizing deposition conditions for the Co-Pt and also under layers. Further magnetically isolated structure was pursued by compositing the film with oxides. Gibbs free energy of the oxides was used to choose a suitable oxide for the composite film. A TtO_2 material was found to form almost stoichiometric composition in the composite film from the beginning of the Co-Pt-TiO_2 layer growth compared with other oxide added Co-Pt films. This film has a relatively low M-H loop slope which expects low noise property of the medium. Co-Pt-TiO_2 shows an average grain size and very small distribution of 6.4 nm and 15 %, respectively.A stacked structure of the nano-composite Co-Pt-TiO_2 film followed by the exchange coupled Co-Pt film is proposed for the candidate structure of the next generation high density media. Magnetic properties such as an M-H loop slope and perpendicular coercivity can be controlled by Ar gas pressure of the Co-Pt layer deposition.
提出了一种用于高密度磁记录介质的co - pt -氧化物薄膜,目标是500gbit /in^2及以上。该介质需要具有以下特性:(a)具有磁隔离晶粒结构的纳米复合结构,以获得低噪声性能;(b)具有均匀尺寸分布的纳米晶粒,以获得高分辨率;(c)具有大磁各向异性能,以获得记录钻头的热稳定性。为解决这一要求,提出了以下几种思路:(1)采用磁各向异性能大的Co-Pt薄膜作为存储层;(2)采用Co-Pt薄膜与氧化材料的复合结构,并提出TiO_2作为优越的氧化材料;(3)采用高Ar气压沉积Co-Pt薄膜和磁隔离结构的Co-Pt-TiO_2堆叠结构。通过优化Co-Pt的沉积条件和层下沉积条件,获得了较大的磁各向异性。通过与氧化物复合,进一步实现了膜的磁隔离结构。利用氧化物的吉布斯自由能选择合适的氧化物制备复合膜。与其他添加氧化物的Co-Pt膜相比,从Co-Pt- tio_2层生长开始,TtO_2材料就在复合膜中形成了接近化学计量的成分。该膜具有相对较低的M-H环斜率,期望介质具有较低的噪声特性。Co-Pt-TiO_2晶粒尺寸平均,粒径分布很小,分别为6.4 nm和15%。提出了一种纳米复合Co-Pt- tio_2薄膜的堆叠结构,然后是交换偶联的Co-Pt薄膜,作为下一代高密度介质的候选结构。Co-Pt层沉积的氩气压力可控制M-H环斜率和垂直矫顽力等磁性能。
项目成果
期刊论文数量(19)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Development of Co-Pt-Cr thin film for high density perpendicular magnetic recording media by controlling film microstructure.
通过控制薄膜微观结构开发用于高密度垂直磁记录介质的Co-Pt-Cr薄膜。
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:J.Ariake;S.Watanabe;N.Honda;有明 順;J.Ariake
- 通讯作者:J.Ariake
Stacked Structure Media for High Density Perpendicular
用于高密度垂直的堆叠结构介质
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:J.Ariake;S.Watanabe;N.Honda
- 通讯作者:N.Honda
高密度磁気記録媒体の研究におけるナノ薄膜解析
高密度磁记录介质研究中的纳米薄膜分析
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:J.Ariake;S.Watanabe;N.Honda;有明 順
- 通讯作者:有明 順
CO-PT THIN FILMS WITH LARGE MAGNETIC ANISOTROPY FOR HIGH DENSITY PERPENDICLAR MAGNETIC RECORDING MEDIA
用于高密度垂直磁记录介质的大磁各向异性CO-PT薄膜
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:J.Ariake;T.Chiba;N.Honda;J.Ariake;有明 順;J.Ariake
- 通讯作者:J.Ariake
Oxide addition to Co-Pt Films for High Density Perpendicular Magnetic Recording Media
用于高密度垂直磁记录介质的 Co-Pt 薄膜中的氧化物添加
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:J.Ariake;T.Chiba;N.Honda;J.Ariake;有明 順;J.Ariake;有明 順;有明 順;J.Ariake;J.Ariake
- 通讯作者:J.Ariake
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