Bui, Dinh Tu and Pham, Duc Thang and Le, Khac Quynh and Le, Viet Cuong and Do, Thi Huong Giang and Nguyen, Huu Duc (2017) Enhancement of the sensitivity of magnetic field sensor based on anisotropic magetoresistance effect in NiFe thin films. In: FSM 2017, 2017, German.
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Abstract
The sensitivity magnetic sensors have become essential for applications in many fields such as biomedicine, computer memories, geophysics and etc. It is known that the sensitivity of magnetic anisotropy sensor depends on current density as well as the rotation of the magnetic moments corresponded to the external magnetic field. In this study, we fabricated and investigated a number of different configurations of resistor bar in the Wheatone bridge sensor. The samples were made in magnetic field pins with varying intensity from 0 to 900 Oe. Furthermore, different shapes of resistor, as in circle, rectangle, ellipse, were fabricated with the film thickness of 15 nm. The analyzed results indicated that the rotation of the magnetic moments occurs rapidly and sharp in the small magnetic field (0 - 3 Oe) with samples fabricated in the high magnetic field pinned. The strong magnetic anisotropy was also observed in the rectangular configuration. In addition, the sensors have been optimized for measuring small magnetic field.
| Item Type: | Conference or Workshop Item (Poster) |
|---|---|
| Subjects: | Engineering Physics |
| Divisions: | Faculty of Engineering Physics and Nanotechnology (FEPN) |
| Depositing User: | Dinh Tu Bui |
| Date Deposited: | 27 Dec 2017 01:25 |
| Last Modified: | 10 Jan 2018 08:37 |
| URI: | http://eprints.uet.vnu.edu.vn/eprints/id/eprint/2860 |
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