Tunable interfacial Dzyaloshinskii–Moriya interaction in symmetrical Au/[Fe/Au]n multilayers,Nanoscale

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Tunable interfacial Dzyaloshinskii–Moriya interaction in symmetrical Au/[Fe/Au]n multilayers
Nanoscale ( IF 5.8 ) Pub Date : 2021-1-8 , DOI: 10.1039/d0nr06488b
W. Zhang _{1,

2,

3,

4,

5} , R. Chen _{6,

7,

8,

9,

10} , B. Jiang _{1,

2,

3,

4,

5} , X. Zhao _{1,

2,

3,

4,

5} , W. Zhao _{6,

7,

8,

9,

10} , S. S. Yan _{1,

2,

3,

4,

5} , G. Han _{1,

2,

3,

4,

5} , S. Yu _{1,

2,

3,

4,

5} , G. Liu _{1,

2,

3,

4,

5} , S. Kang _{1,

2,

3,

4,

5}

Affiliation

The interfacial Dzyaloshinskii–Moriya interaction (i-DMI) has been exploited in as-made symmetrical Au/[Fe/Au]_n structures. By tailoring the chirality of the i-DMI at the Au/Fe interface, an overall enhancement of the i-DMI can be obtained in such a symmetrical structure. Furthermore, the tunability of the i-DMI was realized by changing the stacking number n. Compared to the top of Fe, a large tensile stress at the bottom of Fe due to lattice mismatch was responsible for the chirality change in the sub/Au/Fe system. Layer-resolved DMI calculations revealed that the sign of the spin–orbit coupling (SOC) energy was changed for Au near the interface of Au/Fe under tensile stress, subsequently reversing the chirality of the i-DMI from left-handed to right-handed. Our findings provide a simplest way to tune the i-DMI in a multilayer system, further benefiting the application of skyrmion-based devices.

中文翻译：

对称的Au / [Fe / Aun]多层膜中的可调谐界面Dzyaloshinskii–Moriya相互作用

界面的Dzyaloshinskii-Moriya相互作用（i-DMI）已用于已制成的对称Au / [Fe / Au _n ]对称结构中。通过在Au / Fe界面上调整i-DMI的手性，可以在这种对称结构中获得i-DMI的整体增强。此外，通过更改堆叠数n实现了i-DMI的可调性。与Fe的顶部相比，由于晶格失配而导致的Fe底部的大拉伸应力是sub / Au / Fe系统中手性变化的原因。层解析DMI计算表明，在拉伸应力作用下，Au / Fe界面附近的Au的自旋-轨道耦合（SOC）能量的符号发生了变化，随后将i-DMI的手性从左旋改为右旋交。我们的发现为在多层系统中调节i-DMI提供了最简单的方法，从而进一步有利于基于Skyrmion的设备的应用。

更新日期：2021-01-26

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