An AC magnetometer using automatic frequency switching of a resonant excitation coil for magnetic nanoparticles characterization
An AC magnetometer using a resonant excitation coil is presented for magnetic nanoparticles characterization. An automatic resonant frequency switching of the excitation coil circuit is developed to reduce the measurement time and human contributed errors. A network capacitor consists of 13 differen...
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Language: | English English |
| Published: |
2018
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/22258/ http://umpir.ump.edu.my/id/eprint/22258/1/6.%20An%20AC%20magnetometer%20using%20automatic%20frequency%20switching%20of%20a%20resonant.pdf http://umpir.ump.edu.my/id/eprint/22258/2/6.1%20An%20AC%20magnetometer%20using%20automatic%20frequency%20switching%20of%20a%20resonant.pdf |
| _version_ | 1848821550306820096 |
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| author | Mohd Mawardi, Saari Mohd Aufa, Hadi Putera Zaini Hamzah, Ahmad Nurul Akmal, Che Lah |
| author_facet | Mohd Mawardi, Saari Mohd Aufa, Hadi Putera Zaini Hamzah, Ahmad Nurul Akmal, Che Lah |
| author_sort | Mohd Mawardi, Saari |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | An AC magnetometer using a resonant excitation coil is presented for magnetic nanoparticles characterization. An automatic resonant frequency switching of the excitation coil circuit is developed to reduce the measurement time and human contributed errors. A network capacitor consists of 13 different capacitance values is fabricated and controlled by using a relay module and a microcontroller. The resonant circuit of the excitation coil is resonated up to 81.36 kHz to reduce its impedance observed by a current amplifier. The impedance of the resonant excitation coil is evaluated to access the effectiveness of the resonant technique. A first-order differential coil is used to sense the magnetization from a sample and its sensitivity with respect to magnetic moment and frequency is measured. Using the developed system, we measure the complex magnetization of a multi-core iron oxide nanoparticles solution and estimated its hydrodynamic size. |
| first_indexed | 2025-11-15T02:27:08Z |
| format | Conference or Workshop Item |
| id | ump-22258 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T02:27:08Z |
| publishDate | 2018 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-222582018-12-10T04:24:19Z http://umpir.ump.edu.my/id/eprint/22258/ An AC magnetometer using automatic frequency switching of a resonant excitation coil for magnetic nanoparticles characterization Mohd Mawardi, Saari Mohd Aufa, Hadi Putera Zaini Hamzah, Ahmad Nurul Akmal, Che Lah TK Electrical engineering. Electronics Nuclear engineering An AC magnetometer using a resonant excitation coil is presented for magnetic nanoparticles characterization. An automatic resonant frequency switching of the excitation coil circuit is developed to reduce the measurement time and human contributed errors. A network capacitor consists of 13 different capacitance values is fabricated and controlled by using a relay module and a microcontroller. The resonant circuit of the excitation coil is resonated up to 81.36 kHz to reduce its impedance observed by a current amplifier. The impedance of the resonant excitation coil is evaluated to access the effectiveness of the resonant technique. A first-order differential coil is used to sense the magnetization from a sample and its sensitivity with respect to magnetic moment and frequency is measured. Using the developed system, we measure the complex magnetization of a multi-core iron oxide nanoparticles solution and estimated its hydrodynamic size. 2018 Conference or Workshop Item NonPeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/22258/1/6.%20An%20AC%20magnetometer%20using%20automatic%20frequency%20switching%20of%20a%20resonant.pdf pdf en http://umpir.ump.edu.my/id/eprint/22258/2/6.1%20An%20AC%20magnetometer%20using%20automatic%20frequency%20switching%20of%20a%20resonant.pdf Mohd Mawardi, Saari and Mohd Aufa, Hadi Putera Zaini and Hamzah, Ahmad and Nurul Akmal, Che Lah (2018) An AC magnetometer using automatic frequency switching of a resonant excitation coil for magnetic nanoparticles characterization. In: 9th IEEE Control And System Graduate Research Colloquium (ICSGRC 2018) , 3 - 4 Aug 2018 , Shah Alam, Selangor. pp. 1-4.. (Unpublished) (Unpublished) |
| spellingShingle | TK Electrical engineering. Electronics Nuclear engineering Mohd Mawardi, Saari Mohd Aufa, Hadi Putera Zaini Hamzah, Ahmad Nurul Akmal, Che Lah An AC magnetometer using automatic frequency switching of a resonant excitation coil for magnetic nanoparticles characterization |
| title | An AC magnetometer using automatic frequency switching of a resonant excitation coil for magnetic nanoparticles characterization |
| title_full | An AC magnetometer using automatic frequency switching of a resonant excitation coil for magnetic nanoparticles characterization |
| title_fullStr | An AC magnetometer using automatic frequency switching of a resonant excitation coil for magnetic nanoparticles characterization |
| title_full_unstemmed | An AC magnetometer using automatic frequency switching of a resonant excitation coil for magnetic nanoparticles characterization |
| title_short | An AC magnetometer using automatic frequency switching of a resonant excitation coil for magnetic nanoparticles characterization |
| title_sort | ac magnetometer using automatic frequency switching of a resonant excitation coil for magnetic nanoparticles characterization |
| topic | TK Electrical engineering. Electronics Nuclear engineering |
| url | http://umpir.ump.edu.my/id/eprint/22258/ http://umpir.ump.edu.my/id/eprint/22258/1/6.%20An%20AC%20magnetometer%20using%20automatic%20frequency%20switching%20of%20a%20resonant.pdf http://umpir.ump.edu.my/id/eprint/22258/2/6.1%20An%20AC%20magnetometer%20using%20automatic%20frequency%20switching%20of%20a%20resonant.pdf |