Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh Environments
The resolution of planar-Hall magnetoresistive (PHMR) sensors was investigated in the frequency range from 0.5 Hz to 200 Hz in terms of its sensitivity, average noise level, and detectivity. Analysis of the sensor sensitivity and voltage noise response was performed by varying operational parameters...
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MDPI AG
2021-10-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/20/6891 |
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| author | Taehyeong Jeon Proloy Taran Das Mijin Kim Changyeop Jeon Byeonghwa Lim Ivan Soldatov CheolGi Kim |
| author_facet | Taehyeong Jeon Proloy Taran Das Mijin Kim Changyeop Jeon Byeonghwa Lim Ivan Soldatov CheolGi Kim |
| author_sort | Taehyeong Jeon |
| collection | DOAJ |
| description | The resolution of planar-Hall magnetoresistive (PHMR) sensors was investigated in the frequency range from 0.5 Hz to 200 Hz in terms of its sensitivity, average noise level, and detectivity. Analysis of the sensor sensitivity and voltage noise response was performed by varying operational parameters such as sensor geometrical architectures, sensor configurations, sensing currents, and temperature. All the measurements of PHMR sensors were carried out under both constant current (CC) and constant voltage (CV) modes. In the present study, Barkhausen noise was revealed in <i>1/f</i> noise component and found less significant in the PHMR sensor configuration. Under measured noise spectral density at optimized conditions, the best magnetic field detectivity was achieved better than 550 pT/√Hz at 100 Hz and close to 1.1 nT/√Hz at 10 Hz for a tri-layer multi-ring PHMR sensor in an unshielded environment. Furthermore, the promising feasibility and possible routes for further improvement of the sensor resolution are discussed. |
| first_indexed | 2024-03-10T06:12:57Z |
| format | Article |
| id | doaj.art-00d948acbf3c4553ab10620534f9914e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T06:12:57Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
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| series | Sensors |
| spelling | doaj.art-00d948acbf3c4553ab10620534f9914e2023-11-22T19:59:06ZengMDPI AGSensors1424-82202021-10-012120689110.3390/s21206891Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh EnvironmentsTaehyeong Jeon0Proloy Taran Das1Mijin Kim2Changyeop Jeon3Byeonghwa Lim4Ivan Soldatov5CheolGi Kim6Department of Emerging Materials Science, DGIST, Daegu 42988, KoreaMagnetics Initiative Life Care Research Center, DGIST, Daegu 42988, KoreaDepartment of Emerging Materials Science, DGIST, Daegu 42988, KoreaDepartment of Emerging Materials Science, DGIST, Daegu 42988, KoreaMagnetics Initiative Life Care Research Center, DGIST, Daegu 42988, KoreaLeibniz Institute for Solid State and Materials Research (IFW) Dresden, Helmholtzstraße 20, D-01069 Dresden, GermanyDepartment of Emerging Materials Science, DGIST, Daegu 42988, KoreaThe resolution of planar-Hall magnetoresistive (PHMR) sensors was investigated in the frequency range from 0.5 Hz to 200 Hz in terms of its sensitivity, average noise level, and detectivity. Analysis of the sensor sensitivity and voltage noise response was performed by varying operational parameters such as sensor geometrical architectures, sensor configurations, sensing currents, and temperature. All the measurements of PHMR sensors were carried out under both constant current (CC) and constant voltage (CV) modes. In the present study, Barkhausen noise was revealed in <i>1/f</i> noise component and found less significant in the PHMR sensor configuration. Under measured noise spectral density at optimized conditions, the best magnetic field detectivity was achieved better than 550 pT/√Hz at 100 Hz and close to 1.1 nT/√Hz at 10 Hz for a tri-layer multi-ring PHMR sensor in an unshielded environment. Furthermore, the promising feasibility and possible routes for further improvement of the sensor resolution are discussed.https://www.mdpi.com/1424-8220/21/20/6891magnetoresistive sensorsplanar-Hall magnetoresistancesensitivityfield detectivity |
| spellingShingle | Taehyeong Jeon Proloy Taran Das Mijin Kim Changyeop Jeon Byeonghwa Lim Ivan Soldatov CheolGi Kim Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh Environments Sensors magnetoresistive sensors planar-Hall magnetoresistance sensitivity field detectivity |
| title | Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh Environments |
| title_full | Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh Environments |
| title_fullStr | Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh Environments |
| title_full_unstemmed | Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh Environments |
| title_short | Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh Environments |
| title_sort | operational parameters for sub nano tesla field resolution of phmr sensors in harsh environments |
| topic | magnetoresistive sensors planar-Hall magnetoresistance sensitivity field detectivity |
| url | https://www.mdpi.com/1424-8220/21/20/6891 |
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