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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2506.15320 |
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| _version_ | 1866911315212107776 |
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| author | Zeilinger, Sebastian Güttinger, Johannes Prügl, Klemens Kirsch, Michael Salazar-Mejía, Joshua M. Koraltan, Sabri Heinrich, Philip Zeilinger, Sophie Aichner, Bernd Bruckner, Florian Brückl, Hubert Satz, Armin Suess, Dieter |
| author_facet | Zeilinger, Sebastian Güttinger, Johannes Prügl, Klemens Kirsch, Michael Salazar-Mejía, Joshua M. Koraltan, Sabri Heinrich, Philip Zeilinger, Sophie Aichner, Bernd Bruckner, Florian Brückl, Hubert Satz, Armin Suess, Dieter |
| contents | In this work we demonstrate a spin-orbit torque (SOT) magnetic field sensor, designed as a Ta/CoFeB/MgO structure, with high sensitivity and capable of active offset compensation in all three spatial directions. This is described and verified in both experiment and simulation. The measurements of magnetic fields showed an offset of 36, 50, and 37$\mathrm{μT}$ for x-, y-, and z-fields. Furthermore, the sensitivities of these measurements had values of 590, 580, and 490$\mathrm{V\,A^{-1}\,T^{-1}}$ in the x-, y-, and z-direction. In addition, the robustness to bias fields is demonstrated via experiments and single spin simulations by applying bias fields in y-direction. Cross sensitivities were further analyzed via single spin simulations performing a parameter sweep of different bias fields in the y- and z-direction up to $\pm$1mT. Finally, the extraction of the SOT parameters $η_\mathrm{DL}$ and $η_\mathrm{FL}$ is shown via optimization of a single-spin curve to the experimental measurements. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_15320 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | SOT Enabled 3D Magnetic Field Sensor with Low Offset and High Sensitivity Zeilinger, Sebastian Güttinger, Johannes Prügl, Klemens Kirsch, Michael Salazar-Mejía, Joshua M. Koraltan, Sabri Heinrich, Philip Zeilinger, Sophie Aichner, Bernd Bruckner, Florian Brückl, Hubert Satz, Armin Suess, Dieter Mesoscale and Nanoscale Physics In this work we demonstrate a spin-orbit torque (SOT) magnetic field sensor, designed as a Ta/CoFeB/MgO structure, with high sensitivity and capable of active offset compensation in all three spatial directions. This is described and verified in both experiment and simulation. The measurements of magnetic fields showed an offset of 36, 50, and 37$\mathrm{μT}$ for x-, y-, and z-fields. Furthermore, the sensitivities of these measurements had values of 590, 580, and 490$\mathrm{V\,A^{-1}\,T^{-1}}$ in the x-, y-, and z-direction. In addition, the robustness to bias fields is demonstrated via experiments and single spin simulations by applying bias fields in y-direction. Cross sensitivities were further analyzed via single spin simulations performing a parameter sweep of different bias fields in the y- and z-direction up to $\pm$1mT. Finally, the extraction of the SOT parameters $η_\mathrm{DL}$ and $η_\mathrm{FL}$ is shown via optimization of a single-spin curve to the experimental measurements. |
| title | SOT Enabled 3D Magnetic Field Sensor with Low Offset and High Sensitivity |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2506.15320 |