1/f noise of a tiny tunnel magnetoresistance sensor originated from a wide distribution of bath correlation time
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866916321889878016 |
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| author | Imamura, Hiroshi Arai, Hiroko Matsumoto, Rie Yamaji, Toshiki |
| author_facet | Imamura, Hiroshi Arai, Hiroko Matsumoto, Rie Yamaji, Toshiki |
| contents | Tunnel magnetoresistance (TMR) sensor is a highly sensitive magnetic field sensor and is expected to be applied in various fields, such as magnetic recording, industrial sensing, and bio-medical sensing. To improve the detection capability of TMR sensors in low frequency regime it is necessary to suppress the 1/f noise. We theoretically study 1/f noise of a tiny TMR sensor using the macrospin model. Starting from the generalized Langevin equation, 1/f noise power spectrum and the Hooge parameter are derived. The calculated Hooge parameter of a tiny TMR sensor is much smaller than that of a conventional TMR sensor with large junction area. The results provide a new perspective on magnetic 1/f noise and will be useful for improvement of TMR sensors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_18811 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | 1/f noise of a tiny tunnel magnetoresistance sensor originated from a wide distribution of bath correlation time Imamura, Hiroshi Arai, Hiroko Matsumoto, Rie Yamaji, Toshiki Mesoscale and Nanoscale Physics Applied Physics Tunnel magnetoresistance (TMR) sensor is a highly sensitive magnetic field sensor and is expected to be applied in various fields, such as magnetic recording, industrial sensing, and bio-medical sensing. To improve the detection capability of TMR sensors in low frequency regime it is necessary to suppress the 1/f noise. We theoretically study 1/f noise of a tiny TMR sensor using the macrospin model. Starting from the generalized Langevin equation, 1/f noise power spectrum and the Hooge parameter are derived. The calculated Hooge parameter of a tiny TMR sensor is much smaller than that of a conventional TMR sensor with large junction area. The results provide a new perspective on magnetic 1/f noise and will be useful for improvement of TMR sensors. |
| title | 1/f noise of a tiny tunnel magnetoresistance sensor originated from a wide distribution of bath correlation time |
| topic | Mesoscale and Nanoscale Physics Applied Physics |
| url | https://arxiv.org/abs/2406.18811 |