Simultaneous Control of Interlayer Exchange Coupling and the Interfacial Dzyaloshinskii-Moriya Interaction in Ru-Based Synthetic Antiferromagnets

被引：6
|
作者：
Prudnikov, Aleksandr [1 ]
Li, Maxwell [1 ]
De Graef, Marc [1 ]
Sokalski, Vincent [1 ]
机构：
[1] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA
来源：
IEEE MAGNETICS LETTERS | 2019年 / 10卷
关键词：
Nanomagnetics; synthetic antiferromagnet; Dzyaloshinskii-Moriya interaction; domain wall; OSCILLATIONS; TORQUE;
D O I：
10.1109/LMAG.2018.2882163
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We present a Ru-based synthetic antiferromagnet (SAF) made with asymmetric ferromagnetic building blocks (Pt/Co/Ir or Ir/Co/Pt) to couple their interfacial Dzyaloshinskii-Moriya interaction (DMI) with strong interlayer exchange coupling (IEC). This combination may lead to new types of antiferromagnetic domain walls (DWs), which are conceptually presented in this letter. These include an energetically frustrated configuration and an "isolated" spin chain where a net magnetization exists only at the DW. While most SAF designs incorporate a Co/Ru/Co IEC layer, chiral SAFs require Pt and/or Ir at the Ru/Co interface. In all cases except Pt/Ru/Pt, a significant IEC field is preserved over a range of Ru thicknesses, with the largest occurring for Ir/Ru/Ir. These results demonstrate that ferromagnetic film stacks with purportedly strong DMI can be incorporated into SAFs without compromising IEC.
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页数：4
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