Modeling of Magnetoresistive-Based Electrical Current Sensors: A Technological Approach

The utilization of modeling tools can, in many cases, help us in the design and final prototyping of any sort of sensors. In this paper, we describe a finite-element method (FEM) model applied to a hybrid technology involving a full Wheatstone bridge spin-valve-based electrical current sensor. After...

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Bibliographic Details
Published in:IEEE sensors journal 2007-11, Vol.7 (11), p.1532-1537
Main Authors: Beltran, H., Reig, C., Fuster, V., Ramirez, D., Cubells-Beltran, M.D.
Format: Article
Language:English
Subjects:
Bridge circuits
Costs
Current sensor
Deviation
Encapsulation
Expansion
Fabrication
Finite element method
Finite element methods
finite-element method (FEM)
Inclination
Magnetic analysis
Magnetic sensors
Magnetoresistance
Mathematical analysis
Mathematical models
modeling
Prototypes
Prototyping
Sensor phenomena and characterization
Sensors
spin valve
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Description
Summary:The utilization of modeling tools can, in many cases, help us in the design and final prototyping of any sort of sensors. In this paper, we describe a finite-element method (FEM) model applied to a hybrid technology involving a full Wheatstone bridge spin-valve-based electrical current sensor. After validating the model against experimental results, we focus our studies on geometrical aspects of the sensor configuration, in order to detect possible deviations that may have occurred during the fabrication process. In this regard, the characteristics of the behavior of the sensor depending on lateral displacements and inclination are included. Moreover, the frequency response of the sensor is also analyzed, thus enlarging the scope of the model.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2007.908241