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arXiv 2109.00286cond-mat.mtrl-sci
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绝缘铁磁和反铁磁三层膜中的磁邻近效应

Magnonic Proximity Effect in Insulating Ferro- and Antiferromagnetic Trilayers

Verena Brehm, Martin Evers, Ulrike Ritzmann, Ulrich Nowak

摘要:

设计基于自旋输运的器件,如磁振子晶体管或自旋阀,将需要由具有不同物理性质的不同磁性材料组成的多层系统。这种分层结构可以显示出各种界面效应,其中一类是邻近效应,其中在一个层中发生的某种物理现象泄漏到另一个层中。在这项工作中,磁邻近效应的原子自旋模型内的三层不同的铁磁和反铁磁材料进行了研究。我们发现在中心层的磁序-与较低的临界温度-增强,即使是铁磁体包围的反铁磁体的情况下。我们进一步表征这种邻近效应通过磁振子光谱的具体改变,特别是在中心层的反铁磁体的情况下。

英文摘要:

The design of spin-transport based devices such as magnon transistors or spin valves will require multilayer systems composed of different magnetic materials with different physical properties. Such layered structures can show various interface effects, one class of which being proximity effects, where a certain physical phenomenon that occurs in the one layers leaks into another one. In this work a magnetic proximity effect is studied in trilayers of different ferro- and antiferromagnetic materials within an atomistic spin model. We find the magnetic order in the central layer - with lower critical temperature - enhanced, even for the case of an antiferromagnet surrounded by ferromagnets. We further characterize this proximity effect via the magnon spectra which are specifically altered, especially for the case of the antiferromagnet in the central layer.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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