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MgO Magnetic Tunnel Junction Electrical Current Sensor With Integrated Ru Thermal Sensor.
- Source :
- IEEE Transactions on Magnetics; Jul2013, Vol. 49 Issue 7, p3866-3869, 4p
- Publication Year :
- 2013
-
Abstract
- Full Wheatstone bridge electrical current sensor incorporating 114 MgO-based magnetic tunnel junction elements (3\times 30\ \mum^2) connected in series was produced for improved electrical robustness. To that end, magnetic tunnel junctions with R\timesA\sim 7\ k\Omega\ \mum^2, tunneling magnetoresistance of 200%, were produced. The sensor was designed with an integrated Ru thin film resistive thermal detector (RTD) for temperature drift monitoring and compensation. In order to achieve a full bridge signal, a U-shaped copper trace was placed under a printed circuit board (PCB) specifically designed for this type of device. The resulting device exhibit sensitivities of 63.9 V/Oe/A in a 75 Oe linear range biased with 1 mA current, providing a significantly advantageous alternative to AMR and GMR based bridges. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189464
- Volume :
- 49
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Magnetics
- Publication Type :
- Academic Journal
- Accession number :
- 89227777
- Full Text :
- https://doi.org/10.1109/TMAG.2013.2246550