High-mobility inertial domain walls driven by spin-transfer torque in a ferrimagnetic spinel oxide
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arXiv
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866911720952299520 |
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| author | Wu, Mingxing Ding, Shilei van Schie, Laura Cai, Shenghao Qiu, Yuhao Du, Ao Kossak, Alexander E. Wu, Rui Degen, Christian L. Chen, Xuegang Gambardella, Pietro |
| author_facet | Wu, Mingxing Ding, Shilei van Schie, Laura Cai, Shenghao Qiu, Yuhao Du, Ao Kossak, Alexander E. Wu, Rui Degen, Christian L. Chen, Xuegang Gambardella, Pietro |
| contents | Efficient electrical manipulation of domain walls is key to developing magnetic devices with fast switching capabilities and low energy consumption. Here we demonstrate Bloch-type domain wall velocities exceeding 1 km s$^{-1}$ in the single-layer ferrimagnetic spinel oxide NiCo$_2$O$_4$ induced by spin-transfer torque at a current density of $2 \times 10^{11}$ A m$^{-2}$. This exceptional domain wall mobility is attributed to the combination of giant nonadiabatic spin-transfer torque, low magnetization, and high spin polarization. Additionally, we report a pronounced domain wall inertia effect in this ferrimagnet due to the large nonadiabaticity of the torque. The characteristic time for domain wall acceleration and deceleration is $\sim 1$ ns, shorter than that reported for typical ferromagnets. Our findings highlight the potential of spinel oxides as a promising platform for engineering high-performance domain wall devices that take advantage of ultrafast ferrimagnetic dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_27216 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | High-mobility inertial domain walls driven by spin-transfer torque in a ferrimagnetic spinel oxide Wu, Mingxing Ding, Shilei van Schie, Laura Cai, Shenghao Qiu, Yuhao Du, Ao Kossak, Alexander E. Wu, Rui Degen, Christian L. Chen, Xuegang Gambardella, Pietro Mesoscale and Nanoscale Physics Materials Science Efficient electrical manipulation of domain walls is key to developing magnetic devices with fast switching capabilities and low energy consumption. Here we demonstrate Bloch-type domain wall velocities exceeding 1 km s$^{-1}$ in the single-layer ferrimagnetic spinel oxide NiCo$_2$O$_4$ induced by spin-transfer torque at a current density of $2 \times 10^{11}$ A m$^{-2}$. This exceptional domain wall mobility is attributed to the combination of giant nonadiabatic spin-transfer torque, low magnetization, and high spin polarization. Additionally, we report a pronounced domain wall inertia effect in this ferrimagnet due to the large nonadiabaticity of the torque. The characteristic time for domain wall acceleration and deceleration is $\sim 1$ ns, shorter than that reported for typical ferromagnets. Our findings highlight the potential of spinel oxides as a promising platform for engineering high-performance domain wall devices that take advantage of ultrafast ferrimagnetic dynamics. |
| title | High-mobility inertial domain walls driven by spin-transfer torque in a ferrimagnetic spinel oxide |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2605.27216 |