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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2402.15741 |
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| _version_ | 1866913157354618880 |
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| author | Peng, Wenzhi Liu, Zheng Pan, Haolin Wang, Peng Chen, Yulong Zhang, Jiachen Yu, Xuhao Shen, Jinhui Yang, Mingmin Niu, Qian Gao, Yang Hou, Dazhi |
| author_facet | Peng, Wenzhi Liu, Zheng Pan, Haolin Wang, Peng Chen, Yulong Zhang, Jiachen Yu, Xuhao Shen, Jinhui Yang, Mingmin Niu, Qian Gao, Yang Hou, Dazhi |
| contents | The Anomalous Hall Effect (AHE) manifests as a transverse voltage proportional to magnetization in ferromagnetic materials under the application of a charge current, being an indispensable tool for probing magnetism, especially in nanoscale devices. However, the AHE primarily sensitizes to out-of-plane magnetization, thereby hindering its capacity to discern the in-plane magnetization, a characteristic prevalent in ferromagnetic films. Here we challenge this conventional understanding by demonstrating the in-plane magnetization-induced AHE in iron and nickel, two ubiquitous ferromagnets. This observation of the in-plane AHE is remarkable as it contradicts existing theories that forbid such phenomena in cubic crystal systems. We trace the origin of this unanticipated phenomenon to a hitherto unconsidered octupole of the anomalous Hall conductivity in the magnetization space, a mechanism we propose could enable the detection of in-plane AHE in a wide range of ferromagnetic materials. This work realizes the in-plane AHE in common ferromagnets by exploiting the anomalous Hall conductivity octupole, revealing a new physical origin of the AHE and promising to revolutionize the design of magnetic devices and sensors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_15741 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Observation of the In-plane Anomalous Hall Effect induced by Octupole in Magnetization Space Peng, Wenzhi Liu, Zheng Pan, Haolin Wang, Peng Chen, Yulong Zhang, Jiachen Yu, Xuhao Shen, Jinhui Yang, Mingmin Niu, Qian Gao, Yang Hou, Dazhi Materials Science The Anomalous Hall Effect (AHE) manifests as a transverse voltage proportional to magnetization in ferromagnetic materials under the application of a charge current, being an indispensable tool for probing magnetism, especially in nanoscale devices. However, the AHE primarily sensitizes to out-of-plane magnetization, thereby hindering its capacity to discern the in-plane magnetization, a characteristic prevalent in ferromagnetic films. Here we challenge this conventional understanding by demonstrating the in-plane magnetization-induced AHE in iron and nickel, two ubiquitous ferromagnets. This observation of the in-plane AHE is remarkable as it contradicts existing theories that forbid such phenomena in cubic crystal systems. We trace the origin of this unanticipated phenomenon to a hitherto unconsidered octupole of the anomalous Hall conductivity in the magnetization space, a mechanism we propose could enable the detection of in-plane AHE in a wide range of ferromagnetic materials. This work realizes the in-plane AHE in common ferromagnets by exploiting the anomalous Hall conductivity octupole, revealing a new physical origin of the AHE and promising to revolutionize the design of magnetic devices and sensors. |
| title | Observation of the In-plane Anomalous Hall Effect induced by Octupole in Magnetization Space |
| topic | Materials Science |
| url | https://arxiv.org/abs/2402.15741 |