Reduced thermal dependence of the sensitivity of a planar Hall sensor

Abstract

Tuning the shape of magneto-optical Kerr spectrum by changing the strip width in onedimensional Ag-Co-Ag magnetoplasmonic nanogratings

Planar Hall sensor for quantitative measurement of pipe wall thickness reduction based on the magnetic flux density method

“…The design and optimisation of a sensor in this work are derived from our previous development of PHE sensors with approved high sensitivity in the detection of a small quantity of magnetic materials down to 10 −14 emu. This sensitivity is 10,000 times higher than that of a superconducting quantum interference device [12,13], with a very high thermal stability of at least 50-fold higher than that of a conventional Hall effect sensor [14]. These excellent achievements are due to the nature of the sensor's architecture with a diagonal arrangement of biasing current and sensing voltage directions [15,16].…”

“…To design a sensor working at high magnetic fields, we consider the optimisation of the sensor from the fundamental background of the PHE sensor. The PHE voltage (V PHE ) varies with the magnetic field due to the rotation of magnetisation from its easy axis towards the applied field direction, as shown in Equation 7 [14] where θ is the magnetising angle; V 0 is a planar Hall voltage coefficient dependence bias current, geometrical dimension and anisotropic resistivity of the sensor junction; and V offset is the offset voltage.…”

The Comparison of InSb-Based Thin Films and Graphene on SiC for Magnetic Diagnostics under Extreme Conditions

“…Magnetic field diagnostics have always been discussed in the context of cross-cutting technologies that enable the use of specific devices and components in space and on Earth. However, in recent years, the problem has received increased interest, following the rise of high-temperature electronics [ 1 , 2 , 3 , 4 ] and electronics for extreme environments [ 5 ]. Applications for extreme environments include the defense, oil, gas, automotive, aerospace, and geothermal industries.…”

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

“…Temperature dependence of the noise power spectral density and its detailed systematic analysis in MR sensors always provides a promising directive for its application even in harsh environments. In the literature, most of the noise analysis of MR sensors [ 16 , 21 , 32 , 33 , 34 , 35 , 36 ] has been done by comparing the experimental noise spectra with different numerical models, and the analyses deal with sensor noise performance at room temperature only, whereas very few systematic works have been carried out to investigate the total average noise as a function of temperature [ 37 ]. In the temperature dependence of the noise spectrum, an additional noise component appears due to the rise of temperature, generally caused by thermal drift.…”

“…Recently, we decomposed noise source components of different planar-Hall magnetoresistive (PHMR) sensors in order to address their high thermal stability and low temperature drift characteristics [ 17 ]. Earlier studies reveal that because of their field-dependent sensitivity improvement [ 37 ] and unique self-balanced noise compensating feature [ 21 ], PHMR sensors exhibit several advantages as compared with other MR sensors [ 39 , 40 , 41 ]. Moreover, these unique features favor improving the sensor detection limit in a low-frequency regime.…”