Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh Environments

Autor: CheolGi Kim, Ivan Soldatov, Changyeop Jeon, Proloy T. Das, Mijin Kim, Taehyeong Jeon, Byeonghwa Lim
Rok vydání: 2021
Předmět:
Materials science
Magnetoresistance
Field (physics)
MAGNETORESISTIVE SENSORS
MAGNETIC FIELD
TP1-1185
planar-Hall magnetoresistance
ELECTRICITY
Biochemistry
Article
Analytical Chemistry
magnetoresistive sensors
SPECTRAL DENSITY
symbols.namesake
Electricity
field detectivity
MAGNETIC SENSORS
Electrical and Electronic Engineering
Instrumentation
Barkhausen effect
PLANAR-HALL MAGNETORESISTANCE
SENSOR CONFIGURATIONS
FIELD DETECTIVITY
HALL MAGNETORESISTANCE
business.industry
Chemical technology
Noise spectral density
MAGNETO RESISTIVE SENSORS
Resolution (electron density)
MAGNETIC FIELDS
sensitivity
Atomic and Molecular Physics
and Optics
Magnetic field
Magnetic Fields
FIELD RESOLUTION
symbols
Optoelectronics
Constant current
DETECTIVITY
OPERATIONAL PARAMETERS
SENSITIVITY
business
Sensitivity (electronics)
Zdroj: Sensors
Volume 21
Issue 20
Sensors (Basel, Switzerland)
Sensors, Vol 21, Iss 6891, p 6891 (2021)
ISSN: 1424-8220
Popis: The resolution of planar-Hall magnetoresistive (PHMR) sensors was investigated in the frequency range from 0.5 Hz to 200 Hz in terms of its sensitivity, average noise level, and detectivity. Analysis of the sensor sensitivity and voltage noise response was performed by varying operational parameters such as sensor geometrical architectures, sensor configurations, sensing currents, and temperature. All the measurements of PHMR sensors were carried out under both constant current (CC) and constant voltage (CV) modes. In the present study, Barkhausen noise was revealed in 1/f noise and found less significant in the PHMR sensor configuration. under measured noise spectral density at optimized conditions, the best magnetic field detectivity was achieved better than 550 pT/√ Hz at 100 Hz and close to 1.1 nT/√ Hz at 10 Hz for a tri-layer multi-ring PHMR sensor in an unshielded environment. Furthermore, the promising feasibility and possible routes for further improvement of the sensor resolution are discussed. © 2021 by the authors. Licensee MDPI, Basel, Switzerland. Data Availability Statement: All data generated or analyzed during this work are included in funded by the MSIT (No. NRF-2018R11025511) and R&D program of MOTIE (No. 20011264). funded by the MSIT (No. NRF-2018R11025511) and R&D program of MOTIE (No. 20011264).
Databáze: OpenAIRE
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