Improved Sensitivity and Noise in Magneto-Electric Magnetic Field Sensors by Use of Modulated AC Magnetostriction

Gillette, Scott M.; Geiler, Anton L.; Gray, David; Viehland, Dwight; Vittoria, C.; Harris, Vincent G.

doi:10.1109/lmag.2011.2151178

Cited by 67 publications

(24 citation statements)

References 14 publications

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“…12 In this method, an exciting carrier signal provided an effective means to reduce 1/f noise, to increase the signal-to-noise ratio (SNR), and to mitigate vibrational noise that is compared to a conventional passive mode scheme. 13 The effectiveness of this frequency transfer ability was proportional to the nonlinear ME coefficient a ME nonlin: Recently, for Metglas/Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 laminates, a ME nonlin was shown to have an optimum value near H dc ¼ 0. 12 The lack of the need for H dc makes the modulation approach promising.…”

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confidence: 99%

Piezomagnetic strain-dependent non-linear magnetoelectric response enhancement by flux concentration effect

Shen¹,

Gao²,

Wang³

et al. 2013

Appl. Phys. Lett.

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confidence: 99%

Piezomagnetic strain-dependent non-linear magnetoelectric response enhancement by flux concentration effect

Shen¹,

Gao²,

Wang³

et al. 2013

Appl. Phys. Lett.

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“…A related work, which we have recently become aware of, did not report such high sensitivity at 1 Hz. 12 In addition, it should be noted that one can also apply a modulation field to very soft flux concentrators and biasing magnets, although the hysteretic effects in bias magnets may increase the background noise significantly. If one can decrease the background noise near resonance when the AC field is applied, then the sensitivity can be further enhanced.…”

Section: Discussionmentioning

confidence: 99%

Enhancing the sensitivity of magnetoelectric sensors by increasing the operating frequency

Petrie

Viehland

Gray

et al. 2011

Journal of Applied Physics

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Articles you may be interested inEnhanced sensitivity in magnetoelectric current-sensing devices with frequency up-conversion mechanism by modulating the magnetostrictive strain J. Appl. Phys. 115, 17E505 (2014) We present a field modulation technique that increases the operating frequency of magnetoelectric (ME) sensors so that it can match the mechanical resonance frequency of the sensor. This not only improves the sensitivity but also reduces the effect of 1/f noise that is inherent at low frequencies. The technique, which is shown to apply to both symmetric and asymmetric ME sensors, relies on the strong, nonlinear magnetic field dependence of the magnetostriction. The combination of a lower 1/f noise and enhanced response at resonance has increased the signal to noise ratio of a symmetric sensor by two orders of magnitude. The detection limit of this sensor was lowered from 90 to 7 pT/ ffiffiffiffiffi ffi Hz p at 1 Hz in a magnetically unshielded environment.

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“…Magnetoelectric laminate composites feature high sensitivity towards change in magnetic fields (AC magnetic fields), as well as (1) e = 0 +Δ compact size, low-cost and room temperature operation. Therefore, the ME sensors are ideal candidate for the biomagnetic liver susceptometry (Fang et al, 2009;Freeman et al, 2017;Gillette et al, 2011;Lage et al, 2012;Li, Zhao, Zhang, & Datta, 2010;Li et al, 2013;Lu et al, 2015;Ramesh & Spaldin, 2007;Röbisch et al, 2017;Xu et al, 2018).…”

Section: Enhan Cing the S En S Itivit Y And S I G Nal-to -Nois E R mentioning

confidence: 99%

A novel magnetoelectric biomagnetic susceptometer on iron level detection with mice tissue in vitro

Meng-Chien

Luo

et al. 2018

Med Devices & Sens

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Iron plays a vital role in human body. Liver Iron Concentration (LIC) is directly correlated to total body iron and can be an important indicator to a variety of pathologies. Non-invasive methods to quantitatively assess tissue iron with low cost and high sensitivity have drawn vast interests and investments. Among various methods, the magnetoelectric (ME) sensor based biomagnetic liver susceptometer (BLS) is of great promise because it operates at room temperature but with the same principle as that of the well-developed SQUID (Superconducting Quantum Interference Device). Here, we report a magnetoelectric (ME) sensor based BLS system exploiting the recently developed PIN-PMN-PT piezoelectric single crystal. The newly developed ME BLS, which employs the horizontal scanning mechanism with a water bath interface to automatically eliminate the diamagnetic background of the tissues and irregular shape of torso, exhibits an overall sensitivity advancement (300X) to the sensor system previously reported. A linear correlation (R2 = 0.97) found between the system measurements and the biopsy data demonstrates the validity of the system. The ability to detect signals from only 3cc of mouse liver tissue samples suggests a high spatial resolution which could be used for finer scanning and enable magnetic distribution image and profiling.

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Improved Sensitivity and Noise in Magneto-Electric Magnetic Field Sensors by Use of Modulated AC Magnetostriction

Cited by 67 publications

References 14 publications

Piezomagnetic strain-dependent non-linear magnetoelectric response enhancement by flux concentration effect

Piezomagnetic strain-dependent non-linear magnetoelectric response enhancement by flux concentration effect

Enhancing the sensitivity of magnetoelectric sensors by increasing the operating frequency

A novel magnetoelectric biomagnetic susceptometer on iron level detection with mice tissue in vitro

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