Results 81 to 90 of about 3,275 (185)

Detection of Fetal Arrhythmia by Using Optically Pumped Magnetometers

JACC: Clinical Electrophysiology, 2018
Fetal magnetocardiography (fMCG) is an emerging technology that has provided invaluable insight into the mechanisms of fetal arrhythmia. Its efficacy for diagnosis and management of serious fetal arrhythmia has been acknowledged in the recent American Heart Association Statement on Diagnosis ...
Margo, Batie, Sarah, Bitant, Janette F, Strasburger, Vishal, Shah, Orang, Alem, Ronald T, Wakai   +5 more
openaire   +2 more sources

Leaky‐Integrate‐Fire Neuron via Synthetic Antiferromagnetic Coupling and Spin‐Orbit Torque

Advanced Science, EarlyView.
A spintronic leaky‐integrate‐and‐fire neuron is realized using Spin Orbit Torque driven domain‐wall motion for integration and synthetic antiferromagnetic coupling for the leaky process. The specialized Hall‐bar geometry enables controlled DW dynamics, achieving repeatable integration and firing events. This compact, CMOS‐compatible design highlights a
Badsha Sekh, Durgesh Kumar, Hasibur Rahaman, Ravi Shankar Verma, Ramu Maddu, Jianpeng Chan, Wai Lum William Mah, Stuart S. P. Parkin, S. N. Piramanayagam   +8 more
wiley   +1 more source

Wavelength Locking of Vertical-Cavity Surface-Emitting Laser in Optically Pumped Magnetometer

Shanghai Jiaotong Daxue xuebao
Aimed at the requirements of optically pumped magnetometer (OPM) for miniaturization, low power consumption and laser frequency stability, a wavelength locking control scheme for vertical-cavity surface-emitting laser is proposed.
LUO Manruo, LI Shaoliang, HUANG Yiming, ZHANG Chi, WU Zhaocai, LIU Hua
doaj   +1 more source

Stray Magnetic Field Compensation with a Scalar Atomic Magnetometer

, 2010
We describe a system for the compensation of time-dependent stray magnetic fields using a dual channel scalar magnetometer based on non-linear Faraday rotation in synchronously optically pumped Cs vapour.
Belfi, Jacopo, Bevilacqua, Giuseppe, Biancalana, Valerio, Cecchi, Roberto, Dancheva, Yordanka, Moi, Luigi   +5 more
core   +1 more source

Strain‐Assembled Crystalline SrRuO3 Microtube and Emergent Curvilinear Magnetism

Advanced Science, EarlyView.
The interfacial‐strain assembly based on planar nanomembranes presents a promising approach for constructing novel magnetic microstructures. By employing the perpendicular magnetic anisotropic SrRuO3 freestanding nanomembrane as a model system, we exploit the interfacial strain effect within the crystalline SrTiO3/SrRuO3 bilayer, and successfully ...
Lei Gao, Yuqian Wang, Xiangyu Lyu, Pengyu Liu, Mingtong Zhu, Jin Liu, Mengcheng Li, Ailing Ji, Qinghua Zhang, Lin Gu, Libo Ma, Zexian Cao, Nianpeng Lu   +12 more
wiley   +1 more source

A Low-Noise High-Density Alkali Metal Scalar Magnetometer [PDF]

, 2006
We present an experimental and theoretical study of a scalar atomic magnetometer using an oscillating field-driven Zeeman resonance in a high-density optically-pumped potassium vapor.
A. Abragam, A. David, E. B. Aleksandrov, G. Vasilakis, I. M. Savukov, M. V. Romalis, R. K. Ghosh, S. J. Smullin   +7 more
core   +2 more sources

Fe‐Based Nanocrystalline Magnetic Shielding Cylinder with Subfemtotesla‐Level Magnetic Noise

Advanced Science, EarlyView.
Shields with low magnetic noise are achieved by integrating Fe‐based nanocrystalline magnetic shielding cylinders into shielding systems based on μ‐metal. Benefiting from high permeability and low loss factor, Fe‐based nanocrystalline magnetic shielding cylinders effectively suppress magnetic noise. Notably, the magnetic shielding cylinder with the ten‐
Peipei Shen, Danyue Ma, Kun Wang, Shuang Li, Yanan Gao, Pengfei Wang, FuSen Yuan, Hua Chen, Zhuo Wang, Ziling Liu, Meng Xie, Bo Li, Hongbo Zhou, Baoan Sun   +13 more
wiley   +1 more source

Compensation System for Biomagnetic Measurements with Optically Pumped Magnetometers inside a Magnetically Shielded Room

Sensors, 2020
Magnetography with superconducting quantum interference device (SQUID) sensor arrays is a well-established technique for measuring subtle magnetic fields generated by physiological phenomena in the human body.
Anna Jodko-Władzińska, Krzysztof Wildner, Tadeusz Pałko, Michał Władziński   +3 more
doaj   +1 more source

Soft Magnetic Sensor Array for Amphibious Measurement of 3D Muscle Deformation Distribution for Human Motion Recognition

Advanced Intelligent Systems, EarlyView.
This article develops a soft magnetic sensor array to extract 3D and distributional muscle deformations, which has highly consistent measurements in amphibious environments, robustness to hydraulic pressure, and about 200 ms faster response than an inertial measurement unit, achieving over 98% classification accuracy and below 3% phase estimation ...
Yuchao Liu, Zihan Chen, Chuxuan Guo, Zijie Liu, Yibin Chen, Xuan Wu, Zhuo Li, Qining Wang, Jiajie Guo   +8 more
wiley   +1 more source

A modular optically pumped magnetometer system

Quantum Science and Technology
Abstract To address the demands in healthcare and industrial settings for spatially resolved magnetic imaging, we present a modular optically pumped magnetometer (OPM) system comprising a multi-sensor array of highly sensitive quantum magnetometers.
T Coussens, A Gialopsou, C Abel, M G Bason, T M James, W Evans, M T M Woodley, D Nightingale, D Nicolau, L Page, F Oručević, P Krüger   +11 more
openaire   +2 more sources