Magnetization reversal in film-nanostructure architectures

薄膜纳米结构结构中的磁化反转

• 批准号: 165768161
• 负责人: Professor Dr. Manfred Albrecht
• 金额: --
• 依托单位: Lehrstuhl für Experimentalphysik IV
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/165768161?language=en
• 关键词: Magnetization; reversal; film; nanostructure; architectures

A new concept of a storage medium referred to as percolated perpendicular medium (PPM) has been recently introduced. This medium consists of an exchange coupled magnetic film grown on a substrate with densely distributed defect sites acting as pinning sites for magnetic domain walls. In this respect the magnetic anisotropie is important to controll the domain wall width of the film which needs to be adjusted to the pore size and period. In the proposed project an innovative approach will be investigated which is based on the deposition of hard magnetic films onto nanoperforated membranes. These substrates will be synthesized via a sol-gel based strategy. The route allows preparing nanopores in a wide size range between 5 to 100 nm. Furthermore, Co/Pt multilayer systems and CoPt alloys provide a perpendicular anisotropy which can be substantially varied between 0.1 and 3 MJ/m3 by either changing the composition or the growth conditions allowing a systematic investigation of the effective domain wall pinning, which provides a further understanding of magnetic coupling phenomena at the nanoscale.

最近已经引入了被称为垂直介质（PPM）的存储介质的新概念。该介质由生长在衬底上的交换耦合磁膜组成，该衬底具有密集分布的缺陷位点，该缺陷位点充当磁畴壁的钉扎位点。在这方面，磁各向异性对于控制膜的畴壁宽度是重要的，这需要根据孔径和周期来调节。在拟议的项目中，将研究一种创新的方法，该方法基于在纳米穿孔膜上沉积硬磁膜。这些底物将通过基于溶胶-凝胶的策略合成。该路线允许制备在5至100 nm之间的宽尺寸范围内的纳米孔。此外，Co/Pt多层系统和CoPt合金提供垂直各向异性，其可以通过改变组合物或生长条件而在0.1和3 MJ/m3之间实质上变化，从而允许对有效畴壁钉扎的系统调查，这提供了对纳米尺度下的磁耦合现象的进一步理解。

项目成果

Probing the energy barriers and magnetization reversal processes of nanoperforated membrane based percolated media

• DOI: 10.1088/0957-4484/24/14/145702
• 发表时间: 2013-04
• 期刊: Nanotechnology
• 影响因子: 3.5
• 作者: V. Neu;C. Schulze;M. Faustini;Jehyun Lee;D. Makarov;D. Suess;S. Kim;D. Grosso;L. Schultz;M. Albrecht