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Planar Hall Resistance Sensor With Improved Thermal Stability

Title
Planar Hall Resistance Sensor With Improved Thermal Stability
Authors
Jeon, TaehyeongLee, JaehoonTalantsev, ArtemKim, CheolGi
DGIST Authors
Jeon, Taehyeong; Lee, Jaehoon; Talantsev, Artem; Kim, CheolGi
Issue Date
2019-09
Citation
IEEE Magnetics Letters, 10
Type
Article
Article Type
Article
Author Keywords
Magnetic instrumentsmagnetic sensorsthermal driftanisotropic magneto-resistancebalanced and unbalanced planar Hall effect bridges
Keywords
Orders of magnitudePlanar Hall effectTemperature coefficientTemperature coefficient of resistanceTemperature dependenceThermal driftsHall effect devicesAnisotropyEnhanced magnetoresistanceMagnetic fieldsMagnetic sensorsMagnetoresistanceTemperature distributionTemperature measurementTemperature sensorsThermodynamic stabilityWaveguide junctionsHigh thermal stabilityIndependent components
ISSN
1949-307X
Abstract
High thermal stability of the planar Hall resistance (PHR) signal in magnetic sensors, configured as a cross-junction and as a Wheatstone bridge, has been demonstrated. The thermal drift of the PHR signal, which is proportional to the PHR offset at zero field, is few orders of magnitude less than the thermal drift of the anisotropic magnetoresistance signal. The thermal drift of the PHR originates from two independent components: baseline drift and signal amplitude drift. The temperature coefficient of baseline drift, normalized by zero-field offset, is similar to the temperature coefficient of resistance. This makes it possible to characterize drift in any temperature range by a single measurement of PHR under ambient conditions. Signal amplitude drift is shown to be dependent on a sensor's geometry, and becomes higher with a reduction of the width of the current path. The temperature coefficients of baseline drift and signal amplitude drift are of opposite sign. The possibility of mutual compensation of signal amplitude drift and baseline drift by a slight imbalance in a bridge-type sensor is demonstrated. © 2010-2012 IEEE.
URI
http://hdl.handle.net/20.500.11750/10982
DOI
10.1109/LMAG.2019.2943054
Publisher
Institute of Electrical and Electronics Engineers
Related Researcher
  • Author Kim, CheolGi Lab for NanoBio-MatErials & SpinTronics(nBEST)
  • Research Interests Magnetic Materials and Spintronics; Converging Technology of Nanomaterials and Biomaterials; Bio-NEMS;MEMS
Files:
There are no files associated with this item.
Collection:
Department of Emerging Materials ScienceLab for NanoBio-Materials & SpinTronics(nBEST)1. Journal Articles


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