Total ionizing dose (TID) evaluation of magnetic tunnel junction (MTJ) current sensors

•The behaviour of tunnel magnetoresistive current sensors in response to irradiation is presented using the ESA ESCC Basic specification no. 22900. The paper shows an experimental study to know the behaviour of tunnel magnetoresistive effect-based current sensors configured in a Wheatstone bridge in...

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Published inSensors and actuators. A. Physical. Vol. 225; pp. 119 - 127
Main Authors Arias, Sergio Iván Ravelo, Muñoz, Diego Ramírez, Cardoso, Susana, Ferreira, Ricardo, Freitas, Paulo Jorge Peixeiro de
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.04.2015
Subjects
Actuators
Current sensor
Dosage
Electric potential
Irradiation
Magnetic tunnel junction
Power converters
Radiation immunity
Sensors
Space applications
Total ionizing dose
Tunnel junctions
Voltage
Radiation immunity
Current sensor
Total ionizing dose
Magnetic tunnel junction
Space applications
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Summary:•The behaviour of tunnel magnetoresistive current sensors in response to irradiation is presented using the ESA ESCC Basic specification no. 22900. The paper shows an experimental study to know the behaviour of tunnel magnetoresistive effect-based current sensors configured in a Wheatstone bridge in response to irradiation. In particular the sensitivity, hysteresis, output offset voltage and input resistance are discussed when the sensors are submitted to a total irradiation dose of 43krad with 36krad/h dose rate. The same electrical parameters were studied subsequently once the irradiated sensors were submitted to an 80°C annealing process. The studied TMR sensors are applied in a switched-mode power converter for space application.
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ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2015.01.021