تقرير
Large spin-orbit torque in a-plane $\alpha$-Fe$_{2}$O$_{3}$/Pt bilayers
| العنوان: | Large spin-orbit torque in a-plane $\alpha$-Fe$_{2}$O$_{3}$/Pt bilayers |
|---|---|
| المؤلفون: | Lyalin, Igor, Zhang, Hantao, Michel, Justin, Russell, Daniel, Yang, Fengyuan, Cheng, Ran, Kawakami, Roland K. |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | Realization of efficient spin-orbit torque switching of the N\'eel vector in insulating antiferromagnets is a challenge, often complicated by spurious effects. Quantifying the spin-orbit torques in antiferromagnet/heavy metal heterostructures is an important first step towards this goal. Here, we employ magneto-optic techniques to study damping-like spin-orbit torque (DL-SOT) in a-plane $\alpha$-Fe$_2$O$_3$ (hematite) with a Pt spin-orbit overlayer. We find that the DL-SOT efficiency is two orders of magnitude larger than reported in c- and r-plane hematite/Pt using harmonic Hall techniques. The large magnitude of DL-SOT is supported by direct imaging of current-induced motion of antiferromagnetic domains that happens at moderate current densities. Our study introduces a new method for quantifying spin-orbit torque in antiferromagnets with a small canted moment and identifies a-plane $\alpha$-Fe$_2$O$_3$ as a promising candidate to realize efficient SOT switching. Comment: 6 pages, 3 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2407.07731 |
| رقم الأكسشن: | edsarx.2407.07731 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |