A Superconducting Quantum Interference Device Magnetometer with a Room-Temperature Pickup Coil for Measuring Impedance Magnetocardiograms

Kandori, Akihiko; Suzuki, Daisuke; Yokosawa, Kazuhiko; Tsukamoto, Akira; Miyashita, Tsuyoshi; Tsukada, Keiji; Takagi, Kazumasa

doi:10.1143/jjap.41.596

Cited by 22 publications

(6 citation statements)

References 12 publications

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“…For this reason, the magnetometer with a room-temperature pickup coil (PC) for detecting signals, which can clearly be detected in higher frequency range, was developed in order to simplify the SQUID system. The PC is set outside the cryostat and is connected to the input coil of the SQUID [9] or a channel of superconducting field-effect transistor (SuFET) [10]. On the other hand, implantable-into-nerve fiber transducers are evolving from the ordinary Si-chip microelectronics devices [11] into superconducting and nanodevices [12,13].…”

Section: Isrn Nanotechnologymentioning

confidence: 99%

A CNTFET-Based Nanowired Induction Two-Way Transducers

Sklyar¹

2012

ISRN Nanotechnology

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A complex of the induction magnetic field two-way nanotransducers of the different physical values for both the external and implantable interfaces in a wide range of arrays are summarized. Implementation of the nanowires allows reliable transducing of the biosignals' partials and bringing of carbon nanotubes into circuits leading to examination of the superconducting transition. Novel sensors are based on the induction magnetic field principle, which causes their interaction with an ambient EM field. Mathematical description of both the signal and mediums defines space embracing of the relevant interfacing devices. As a result, a wide range of the nano-bio-transducers allow both delivering the variety of ionized biosignals and interface the bioEM signals with further stages of electronic systems. The space coverage and transducing values properties of the state-of-the-art magnetic interfaces are summarized, and directions for their future development are deduced.

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Section: Isrn Nanotechnologymentioning

confidence: 99%

A CNTFET-Based Nanowired Induction Two-Way Transducers

Sklyar¹

2012

ISRN Nanotechnology

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“…To overcome this, we utilized the technology associated with distant flux transfer to develop a SQUID-based MRA system. [11][12][13] The SQUID-based MRA system used here was developed through the cooperation between authors and Global Applied Biomedical Corporation. Figure 3 shows the scheme for the SQUID-based MRA developed in this work.…”

Section: B Squid-based Mra Systemmentioning

confidence: 99%

Hyper-high-sensitivity wash-free magnetoreduction assay on biomolecules using high-Tc superconducting quantum interference devices

Chieh

Yang

Jian

et al. 2008

Journal of Applied Physics

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In this work, we develop a platform for assaying biomolecules involving the measurement of alternating current (ac) magnetoreduction of magnetic reagent mixed with a detected sample. The magnetic reagent contains magnetic nanoparticles coated with a given kind of antibody, which associates with conjugated biomolecules. Then, the biomolecules can be quantitatively detected by measuring the ac magnetoreduction of magnetic reagent. To achieve hyper-high-sensitivity assay, a system utilizing a high-transition-temperature rf superconducting quantum interference device (SQUID) as a sensor to probe the magnetoreduction of reagent due to the association between biomolecules and magnetic nanoparticles. Examples to assay multiactive epitope, single-active epitope, and small molecules are given to demonstrate the validity of the assay platform, as well as the hyper-high sensitivity.

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“…These devices utilize quantization of the magnetic flux in superconducting phenomena, and can measure extremely weak magnetic fields. For this reason, SQUIDs are used for the development of a variety of magnetometric systems in the fields of medicine, analysis, inspection, resource exploration, and so on . Thus SQUID‐based magnetometers promise new high‐sensitivity measuring systems.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Sensitivity of a Compact Magnetometer by Using HTS‐SQUID with Rotating Sample

Hamasaki

Okamoto

Saari

et al. 2015

Electrical Engineering Japan

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SUMMARYWe have improved a previously developed compact magnetometer using HTS-SQUID with a rotating sample. In the previous system, attenuation of the rotational speed had resulted in deformation of the averaged waveform signal, reducing the reproducibility of measurements. In this paper, we have used a better motor in order to decrease the attenuation of the rotational speed for precise averaging of the output signal and improvement of the signal-to-noise ratio. To improve sensitivity, we also optimized the pickup coil and compared the signal-to-noise ratio of circular and elliptical pickup coils having the same number of turns, resistance, and inductance. As a result, the signal-to-noise ratio was improved with high accuracy and the magnetometer showed a susceptibility sensitivity of 3.8×10 −9 emu. C⃝ 2015 Wiley Periodicals, Inc. Electr Eng Jpn, 194(2): 9-14, 2016; Published online in Wiley Online Library (wileyonlinelibrary.com).

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A Superconducting Quantum Interference Device Magnetometer with a Room-Temperature Pickup Coil for Measuring Impedance Magnetocardiograms

Cited by 22 publications

References 12 publications

A CNTFET-Based Nanowired Induction Two-Way Transducers

A CNTFET-Based Nanowired Induction Two-Way Transducers

Hyper-high-sensitivity wash-free magnetoreduction assay on biomolecules using high-Tc superconducting quantum interference devices

Improvement of Sensitivity of a Compact Magnetometer by Using HTS‐SQUID with Rotating Sample

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