Results 51 to 60 of about 1,280 (179)

Wireless optically pumped magnetometer MEG

NeuroImage
The current magnetoencephalography (MEG) systems, which rely on cables for control and signal transmission, do not fully realize the potential of wearable optically pumped magnetometers (OPM). This study presents a significant advancement in wireless OPM-MEG by reducing magnetization in the electronics and developing a tailored wireless communication ...
Hao Cheng, Kaiyan He, Congcong Li, Xiao Ma, Fufu Zheng, Wei Xu, Pan Liao, Rui Yang, Dongxu Li 0004, Lang Qin, Shuai Na, Bingjiang Lyu, Jia-Hong Gao 0001   +12 more
openaire   +3 more sources

Frequency Response of Optically Pumped Magnetometer with Nonlinear Zeeman Effect

Applied Sciences, 2020
Optically pumped alkali atomic magnetometers based on measuring the Zeeman shifts of the atomic energy levels are widely used in many applications because of their low noise and cryogen-free operation.
Rui Zhang, Teng Wu, Jingbiao Chen, Xiang Peng, Hong Guo   +4 more
doaj   +1 more source

Ultra-sensitive Magnetic Microscopy with an Optically Pumped Magnetometer [PDF]

Scientific Reports, 2016
AbstractOptically pumped magnetometers (OPMs) based on lasers and alkali-metal vapor cells are currently the most sensitive non-cryogenic magnetic field sensors. Many applications in neuroscience and other fields require high-resolution, high-sensitivity magnetic microscopic measurements. In order to meet this demand we combined a cm-size spin-exchange
Young Jin Kim, Igor Savukov
openaire   +2 more sources

Dual‐Mode Magnetic Elastomer for On‐Demand Motion and Degradation

Advanced Functional Materials, EarlyView.
A dual‐mode magnetic elastomer is introduced, enabling DC field‐driven programmable actuation and AC field‐driven magnetothermal degradation. GHz‐range magnetic fields generate ultrafast heating of magnetic nanoparticles that activates cleavage of the silicone elastomer matrix.
Jieun Han, Hyun An, Min‐Ha Oh, Yu‐Lim Lee, Woojin Jeon, Kyung‐Sub Kim, Jae‐Hwan Lee, Seungmin Kang, Yoon‐Nam Kim, Ji‐Won Kang, Daewhan Kim, Min Sang Kwon, Sang‐Koog Kim, Seung‐Kyun Kang   +13 more
wiley   +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

Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine

Advanced Materials, EarlyView.
A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen, Boris Rivkin, David Castellanos‐Robles, Ivan Soldatov, Lukas Beyer, Mariana Medina‐Sánchez   +5 more
wiley   +1 more source

High resolution field imaging with atomic vapor cells [PDF]

, 2015
In this thesis, I report on the development of imaging techniques in atomic vapor cells. This is a relatively unexplored area, despite the ubiquitous use of imaging in experiments with ultracold atoms.
Horsley, Andrew
core   +1 more source

Using optically pumped magnetometers to identify initial damage in bulk material during fatigue testing

, 2022
The extreme sensitivity of quantum magnetometers enables new applications in material testing such as the identification of single defect events in the bulk of small volume specimen (0.1 mm³).
Kühnemann, Frank, Koss, Peter, Bertz, Alexander, Blug, Andreas, Straub, Thomas, Laskin, Gennadii, Thiemann, Kerstin, Durmaz, Ali Riza   +7 more
core   +1 more source

Signatures of Edge States in Antiferromagnetic Van der Waals Josephson Junctions

Advanced Materials, EarlyView.
ABSTRACT The combination of superconductivity and magnetic textures leads to unconventional superconducting phenomena, including new correlated and topological phases. Van der Waals (vdW) materials emerge as a versatile platform for exploring the interplay between these two competing orders.
Celia González‐Sánchez, Ignacio Sardinero, Jorge Cuadra, Alfredo Spuri, José A. Moreno, Hermann Suderow, Elke Scheer, Pablo Burset, Angelo Di Bernardo, Rubén Seoane Souto, Eduardo J. H. Lee   +10 more
wiley   +1 more source

Using optically-pumped magnetometers to measure magnetoencephalographic signals in the human cerebellum [PDF]

, 2019
Key points: The application of conventional cryogenic magnetoencephalography (MEG) to the study of cerebellar functions is highly limited because typical cryogenic sensor arrays are far away from the cerebellum and naturalistic movement is not allowed in
Lin, C-H, Niall Holmes, Holmes, N, Bestmann, S, Richard Bowtell, Boto, Elena, Bowtell, Richard, Lin, Chin-Hsuan, Bestmann, Sven, Brookes, Matthew J, Leggett, James, Barnes, Gareth R, Matthew J. Brookes, Elena Boto, Lin, CH, Chin‐Hsuan Lin, Sven Bestmann, Tim M. Tierney, James Leggett, Brookes, MJ, Holmes, Niall, Miall, R Chris, Boto, E, Leggett, J, Bowtell, R, Miall, RC, Gareth R. Barnes, Tierney, TM, Barnes, GR, Tierney, Tim M, R. Chris Miall   +30 more
core   +1 more source