Pushing the detection limit of thin film magnetoelectric heterostructures

Röbisch, Volker; Salzer, Sebastian; Urs, Necdet Onur; Reermann, Jens; Yarar, E.; Piorra, A.; Kirchhof, Christine; Lage, Enno; Höft, Michael; Schmidt, Gerhard; Knöchel, R.; McCord, Jeffrey; Quandt, Eckhard; Meyners, Dirk

doi:10.1557/jmr.2017.58

Cited by 48 publications

(36 citation statements)

References 42 publications

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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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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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“…[9][10][11][12][13] The results have encouraged investigations to enable the detection of weak low frequency biomagnetic fields with room temperature sensors. 14 This has involved research to increase the effect size of the ME response, e.g., materials, effects of device geometry and operation modes, [15][16][17][18] resonance-enhancement and loss mechanisms, 13 and investigation of noise effects and their behavior including the Johnson-Nyquist noise [19][20][21][22][23] from dielectric losses in piezoelectric materials 24 in ME cantilevers and electronics, noise in magnetostrictive (MS) materials, and thermal vibration noise. 23,[25][26][27][28] Different operation modes investigated for low frequency biomagnetic field sensing 14 include (1) direct detection, where magnetic fields oscillating at the cantilever resonance directly excite magnetostrictivepiezoelectric strain coupling and resonance-enhanced signals; (2) modulation techniques, [29][30][31] where signal fields are detected as sidebands to a carrier as a result of frequency mixing in non-linear functional materials; and (3) the ΔE effect, 32,33 where the field dependence of the elastic modulus in magnetostrictive materials is used.…”

Section: Introductionmentioning

confidence: 99%

Effect of excitation mode on the magnetic field detection limit of magnetoelectric composite cantilevers

Krantz

Gerken

2020

AIP Advances

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Magnetic field excitation of strain-coupled magnetoelectric composite cantilevers in different bending modes is investigated for magnetic field sensing, yielding the sensitivity, noise, and magnetic field detection limit. An analytic theory covering the resonant magnetoelectric response and thermal vibration noise of arbitrary bending modes and the Johnson-Nyquist noise from the composite and electronics is presented, and detection limit results of thin film FeCoBSi-Si-AlN composite cantilevers are calculated for the first three bound-free and free-free bending modes over a wide range of dimensions. We use size-scaling to yield the same 1 kHz resonance frequency for all modes and dimensions, constant quality factors Q f = 1000, and thickness-independent experimental material parameters. Magnetic field detection limits in the 1 pT/Hz 1/2 to 100 fT/Hz 1/2 range are predicted for practical cantilever dimensions, whereby higher modes are found to yield lower detection limits at similar functional layer thicknesses but a greater cantilever size. All detection limits are found to be thermal vibration noise limited and for different modes to display the same 1/size 2 scaling behavior but require different FeCoBSi-Si-AlN layer thickness ratios.

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“…It also has the advantages of low cost, light weight, easy fabrication, and high magnetic directivity. [16,19,[27][28][29][30][31][32] However, the system-level application based on the ME sensor is still in an early stage, although some prototypes have been developed for different usage scenarios. Recently, Chu et al have reported a (1-1) type ME sensor with a 1D configuration.…”

Section: Introductionmentioning

confidence: 99%

A 1D Magnetoelectric Sensor Array for Magnetic Sketching

Shi

Chen

et al. 2018

Adv Materials Technologies

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sensor consisting of a ferromagnetic material surrounded by two coils, one of which is a drive and the other one is a sensing coil, is another widely used magnetic field sensor. The major advantage of the fluxgate sensor over search coils is its ability to precisely measure the weak direct current (DC) magnetic field. However, a fluxgate sensor typically consumes much more power than a search-coil sensor does; also, its sizes are normally big, limiting its applications as a magnetic sensor array for magnetic positioning and imaging. Superconducting quantum interference device is designed based on the Josephson effect, exhibiting the highest sensitivity. However, the need for a liquid-helium coolant for a superconductor magnetometers makes the complete instrument rather bulky and costly. Hall effect sensor, also viewed as a widely used and low-cost sensor, is unfortunately unable to detect a magnetic field weaker than 100 nT.Meanwhile, there are various techniques for metal detecting and metal imaging. Electromagnetic wave-based imaging technologies, such as millimeter waves imaging [3,11] and terahertz waves imaging, [2][3][4] typically employ the difference of transmissivity and reflectivity among different materials. However, this very expensive millimeter wave or terahertz wave technology cannot easily distinguish magnetic objects from nonmagnetic ones. In the case of magnetic imaging for medical application, magnetic induction tomography (MIT), magnetic particle imaging (MPI), and nuclear magnetic resonance (NMR) are typically used. [12,13] MIT technology applies the magnetic field to detect the existence of the object that is going to image. [14,15] The detection principle of the MIT system is based on the giant magneto resistance effect, which shows a high spatial resolution but a very small magnetic detection range too. For MPI and NMR technologies, a good resolution could be obtained; however, a high magnetic intensity is normally assisted. [13] In addition, the superhigh cost and the relatively big size limit the civil applications of MPI and NMR technologies. In the field of metal detection or security checking, X-ray or terahertz waves imaging technologies are normally utilized. But the problem is the body damage of the X-ray passing through a person or the privacy protection issue.Magnetoelectric (ME) effect is defined as the polarization induced by a magnetic field (H) or the magnetization induced by an electric field (E). ME sensors, which consist of ferromagnetic/ferroelectric composite materials Although various magnetic sensors have been developed, tiny magnetic object detection is still a challenging issue in some cases, such as capsule position detection, endoscope navigation, and the detection of magnetic devices hidden in/on the human body. In this paper, a magnetic detecting and sketching system utilizing a 1D magnetic sensor array with 56 magnetoelectric (ME) sensing units is proposed. The ME sensors used in this system are based on a (1-1) connectivity Metglas/piezofiber composite operatin...

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Pushing the detection limit of thin film magnetoelectric heterostructures

Abstract: Abstract

Cited by 48 publications

References 42 publications

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

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

Effect of excitation mode on the magnetic field detection limit of magnetoelectric composite cantilevers

A 1D Magnetoelectric Sensor Array for Magnetic Sketching

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