Results 51 to 60 of about 96,670 (200)

High Sample Rate Optically Pumped Helium Magnetometer [PDF]

Journal of Optoelectronical Nanostructures, 2019
Optically pumped helium magnetometers are important instruments whichhave many applications in military, mass spectroscopy and space applications. In thispaper, the working principles of helium magnetometers have been explained.
Abdorreza Asrar, Mojtaba Servatkhah, Mohammad Javad Salehi   +2 more
doaj  

Development of an optically pumped atomic magnetometer using a K-Rb hybrid cell and its application to magnetocardiography

AIP Advances, 2012
We have developed an optically pumped atomic magnetometer using a hybrid cell of K and Rb. The hybrid optical pumping technique can apply dense alkali-metal vapor to the sensor head and leads to high signal intensity.
Yosuke Ito, Hiroyuki Ohnishi, Keigo Kamada, Tetsuo Kobayashi   +3 more
doaj   +1 more source

Pulsed Optically Pumped Magnetometers: Addressing Dead Time and Bandwidth for the Unshielded Magnetorelaxometry of Magnetic Nanoparticles

Sensors, 2021
Magnetic nanoparticles (MNP) offer a large variety of promising applications in medicine thanks to their exciting physical properties, e.g., magnetic hyperthermia and magnetic drug targeting.
Aaron Jaufenthaler, Thomas Kornack, Victor Lebedev, Mark E. Limes, Rainer Körber, Maik Liebl, Daniel Baumgarten   +6 more
doaj   +1 more source

Three‐Dimensional Anomalous Hall Sensing Enabled By Spin–Orbit Torque Driven Domain Reconfiguration In Chiral Multilayers

Advanced Functional Materials, EarlyView.
A three‐dimensional magnetic field sensor is realized in chiral W/CoFeB/MgO multilayers, where spin–orbit torques reversibly reconfigure homochiral stripe domains. The symmetry of the torque enables offset‐free in‐plane sensing, while the reproducible domain reconfiguration extends the linear out‐of‐plane range. An anomalous Hall readout delivers large‐
Sabri Koraltan, Rahul Gupta, Reshma Peremadathil Pradeep, Fabian Kammerbauer, Iryna Kononenko, Klemens Prügl, Michael Kirsch, Bernd Aichner, Santiago Helbig, Florian Bruckner, Claas Abert, Andrada Oana Mandru, Armin Satz, Gerhard Jakob, Hans Josef Hug, Mathias Kläui, Dieter Suess   +16 more
wiley   +1 more source

Multi-channel whole-head OPM-MEG: Helmet design and a comparison with a conventional system

NeuroImage, 2020
Magnetoencephalography (MEG) is a powerful technique for functional neuroimaging, offering a non-invasive window on brain electrophysiology. MEG systems have traditionally been based on cryogenic sensors which detect the small extracranial magnetic ...
Ryan M. Hill, Elena Boto, Molly Rea, Niall Holmes, James Leggett, Laurence A. Coles, Manolis Papastavrou, Sarah K. Everton, Benjamin A.E. Hunt, Dominic Sims, James Osborne, Vishal Shah, Richard Bowtell, Matthew J. Brookes   +13 more
doaj   +1 more source

Light-noise suppression method for the single-beam optically-pumped magnetometer arrays.

Optics Express, 2023
We propose a miniaturized single-beam optically pumped magnetometer (OPM) with a laser power differential structure, along with a dynamically-adjusted detection circuit. This design enables the suppression of optical fluctuation noise and the enhancement
Yuchen Suo, Xinda Song, Zhendong Wu, Ziqi Yuan, Le Jia, Teng Long   +5 more
semanticscholar   +1 more source

Quantifying Subsurface Weak in‐Plane Magnetization of Mixed Phase BiFeO3 by Scanning Nitrogen Vacancy Magnetometry

Advanced Functional Materials, EarlyView.
We use scanning nitrogen vacancy magnetometry to directly image the weak in‐plane magnetic moments in mixed phase BiFeO3 at the nanoscale and quantify the local magnetic moments to be 18.8±2.0 μB/nm2 in the rhombohedral‐like phase and 1.5±0.6 μB/nm2 in the well‐known non‐magnetic tetragonal‐like phase.
Lei Wang, Zhewen Xu, Yuwen Xu, Björn Josteinsson, Simon Josephy, Dawei Zhang, Yunlong Sun, Heung‐Sik Park, Jihun Kim, Kanghyun Chu, Kyung Song, Danyang Wang, Chan‐Ho Yang, Andrea Morales, Jan Seidel   +14 more
wiley   +1 more source

Discrimination of finger movements by magnetomyography with optically pumped magnetometers

Scientific Reports, 2023
Abstract Optically pumped magnetometers (OPM) are quantum sensors that offer new possibilities to measure biomagnetic signals. Compared to the current standard surface electromyography (EMG), in magnetomyography (MMG), OPM sensors offer the advantage of contactless measurements of muscle activity.
Antonino Greco, Sangyeob Baek, Thomas Middelmann, Carsten Mehring, Christoph Braun, Justus Marquetand, Markus Siegel   +6 more
openaire   +5 more sources

Nanodiamond Sensing in Dynamic Environments With Fast‐Tracking Through Four‐Point Positioning

Advanced Functional Materials, EarlyView.
A four‐point positioning tracking (4PPT) platform enables fast 3D feedback translational tracking of fluorescent nanodiamonds while simultaneously recording ODMR spectra. By integrating real‐time translational tracking with quantum sensing, mobile nanodiamonds are used for in‐situ nanothermometry, nanorheometry, and 6D translation–rotation tracking in ...
Guoli Zhu, Ming‐Zhong Ai, Zhi‐Yu Zhao, Weng‐Hang Leong, Shi‐Ning Chen, Xi Liu, Jing‐Wei Fan, Xi Feng, Ren‐Bao Liu, Yue Cui, Quan Li   +10 more
wiley   +1 more source

An accurate vector optically pumped magnetometer with microwave-driven Rabi frequency measurements [PDF]

Optica
Robust calibration of vector optically pumped magnetometers (OPMs) is a nontrivial task, but increasingly important for applications requiring high-accuracy such as magnetic navigation, geophysics research, and space exploration.
C. Kiehl, T. S. Menon, S. Knappe, Tobias Thiele, C. Regal   +4 more
semanticscholar   +1 more source