Effect of Direct-Current Bias on the Perpendicular Giant Magnetoimpedance of a Meander-Line Multilayer Structure

Wang, Tao; Chen, Yu-Yi; He, Yi; Wang, Bicong

doi:10.1109/lmag.2019.2961062

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…Thin film MI biosensors are commonly fabricated by techniques such as physical vapor deposition [ 80 , 81 , 82 ], electrodeposition [ 61 , 83 , 84 , 85 ] or flame plating [ 86 ]. Fabrication methods contribute greatly to MI performance variation.…”

Section: Factors Influencing the Magneto-impedance Effectmentioning

confidence: 99%

Magneto-Impedance Biosensor Sensitivity: Effect and Enhancement

Sayad

Skafidas

Kwan

2020

Sensors

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Biosensors based on magneto-impedance (MI) effect are powerful tools for biomedical applications as they are highly sensitive, stable, exhibit fast response, small in size, and have low hysteresis and power consumption. However, the performance of these biosensors is influenced by a variety of factors, including the design, geometry, materials and fabrication procedures. Other less appreciated factors influencing the MI effect include measuring circuit implementation, the material used for construction, geometry of the thin film sensing element, and patterning shapes compatible with the interface microelectronic circuitry. The type magnetic (ferrofluid, Dynabeads, and nanoparticles) and size of the particles, the magnetic particle concentration, magnetic field strength and stray magnetic fields can also affect the sensor sensitivity. Based on these considerations it is proposed that ideal MI biosensor sensitivity could be achieved when the sensor is constructed in sandwich thick magnetic layers with large sensing area in a meander shape, measured with circuitry that provides the lowest possible external inductance at high frequencies, enclosed by a protective layer between magnetic particles and sensing element, and perpendicularly magnetized when detecting high-concentration of magnetic particles.

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Section: Factors Influencing the Magneto-impedance Effectmentioning

confidence: 99%

Magneto-Impedance Biosensor Sensitivity: Effect and Enhancement

Sayad

Skafidas

Kwan

2020

Sensors

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“…the magneto-inductive effect under low-frequency excitation and resistance variation due to the skin effect under highfrequency excitation [8]. For obtaining significant impedance variation and high sensitivity, the excitation frequency of the GMI sensors has to be above MHz or even GHz, in which case the skin effect dominates [6,[9][10][11]. At such high frequency, the magnetic property of the soft magnetic materials deteriorates seriously and the permeability is dramatically reduced [12,13].…”

Section: Introductionmentioning

confidence: 99%

Magnetic field detection utilizing soft magnetic ribbons and a rectangular solenoid

Bao,

Mu,

Ding

et al. 2024

J. Phys. D: Appl. Phys.

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An effective approach to high-sensitivity magnetic field detection under low-frequency excitation by soft magnetic ribbons and a rectangular solenoid is proposed and certificated. The solenoid wound by nonmagnetic copper wire is located at the geometric center region of the soft magnetic ribbons that act as the magnetic core. The proposed magnetic sensor utilizes the nonlinear magnetization of soft magnetic ribbons and the magneto-inductive effect and proximity effect of the solenoid, exhibiting significant impedance variation at a relatively low frequency. The impedance ratio and impedance sensitivity of the prototype reaches the maximum value of 5630% and 570 %/Oe at 500 kHz, which is far superior to the conventional GMI magnetic sensor and planar coil laminated GMI magnetic sensor. The investigation indicates the fabricated magnetic sensor with optimal dimension parameters can provide a sensitivity of 3329 mV/Oe at 500 kHz. More importantly, the proposed prototype is particularly suitable for micromachining, providing the possibility for manufacturing high-sensitivity micro-magnetic sensors.

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Mutual inductive magnetic sensor consisting of a pair of coplanar parallel winding spiral coils sandwiched by soft magnetic ribbons

Wen

2022

Journal of Magnetism and Magnetic Materials

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Effect of Direct-Current Bias on the Perpendicular Giant Magnetoimpedance of a Meander-Line Multilayer Structure

Cited by 4 publications

References 19 publications

Magneto-Impedance Biosensor Sensitivity: Effect and Enhancement

Magneto-Impedance Biosensor Sensitivity: Effect and Enhancement

Magnetic field detection utilizing soft magnetic ribbons and a rectangular solenoid

Mutual inductive magnetic sensor consisting of a pair of coplanar parallel winding spiral coils sandwiched by soft magnetic ribbons

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