Results 41 to 50 of about 4,902 (209)

EDGE DETECTION IN ATOMIC MAGNETOMETER IMAGING

Journal of the Siena Academy of Sciences, 2019
We present the results of an edge detection algorithm applied on Electromagnetic Induction Imaging provided by an Atomic radio-frequency Magnetometer operating in an unshielded environment and at room temperature. Atomic Magnetometers have been already used for Imaging Techniques in the last few years, but the image reconstruction and the object ...
Papi, N., Cali, E., Marinelli, Carmela, Mariotti, Emilio, Millucci, Vincenzo   +4 more
openaire   +3 more sources

A Coil Constant Calibration Method Based on the Phase-Frequency Response of Alkali Atomic Magnetometer

Photonic Sensors, 2019
We propose an in-situ method to calibrate the coil constants of the optical atomic magnetometer. This method is based on measuring the Larmor precession of spin polarized alkali metal atoms and has been demonstrated on a K-Rb hybrid atomic magnetometer ...
Han Yao, Danyue Ma, Junpeng Zhao, Jixi Lu, Ming Ding   +4 more
doaj   +1 more source

A τ−1 measurement across three orders of magnitude based on an atomic spin precession magnetometer in self-sustaining mode

AIP Advances, 2019
The absolute measurement of magnetic fields can be realized by monitoring the Larmor precession of atomic spins. Yet, this spin-precession magnetometer can only be put into use in weak magnetic fields and the sensitivity is limited by the coherence time ...
Q. Zhao, B. L. Fan, S. G. Wang, L. J. Wang   +3 more
doaj   +1 more source

Spin damping in an rf atomic magnetometer

Physical Review A, 2013
Under negative feedback, the quality factor Q of a radio-frequency magnetometer can be decreased by more than two orders of magnitude, so that any initial perturbation of the polarized spin system can be rapidly damped, preparing the magnetometer for detection of the desired signal.
Alem, Orang, Sauer, Karen L., Romalis, Mike V.   +2 more
openaire   +3 more sources

Fostering Innovation: Streamlining Magnetocaloric Materials Research by Digitalization

Advanced Engineering Materials, EarlyView.
Magnetocaloric cooling (MCE) is an environmentally friendly refrigeration method with great potential. Optimizing MCE materials involves the preparation and screening of large quantities of samples, which in turn generates a large amount of data. A digitalization approach is presented that uses ontologies, knowledge graphs, and digital workflows to ...
Simon Bekemeier, Moritz Blum, Luana Caron, Alisa Chirkova, Philipp Cimiano, Basil Ell, Inga Ennen, Michael Feige, Maik Gaerner, Thomas Hilbig, Andreas Hütten, Günter Reiss, Tapas Samanta, Sonja Schöning, Christian Schröder, Lennart Schwan, Chris Taake, Martin Wortmann   +17 more
wiley   +1 more source

Suppression of thermal coupling noise in the SERF atomic co-magnetometer

Results in Physics, 2023
Heating the alkali metal vapor cell to obtain high atomic density is a prerequisite for realizing the high-precision measurement for spin-exchange relaxation-free (SERF) co-magnetometer.
Jiasen Ruan, Lihong Duan, Yang Fu, Lv Yang, Wenfeng Fan, Xinxiu Zhou, Wei Quan   +6 more
doaj   +1 more source

MPS and ACS with an atomic magnetometer [PDF]

International Journal on Magnetic Particle Imgaging, 2016
We show that a single atomic magnetometer in a magnetically unshielded environment can be used to perform magnetic particle spectroscopy (MPS) and AC susceptometry (ACS) on liquid-suspended magnetic nanoparticles. We demonstrate methods allowing a simultaneous recording of M(H) and dM/dH(H) dependences of samples containing down to 1 $μ$g of iron.
Colombo Simone, Lebedev Victor, Grijic Zoran, Dolgoskiy Vladimir, Weis Antoine   +4 more
openaire   +3 more sources

Irradiation‐Induced Spin Bath Evolution and as‐Grown Hydrogen Defects in CVD Diamond Revealed by NV‐Based DEER Spectroscopy

Advanced Functional Materials, EarlyView.
Here, we provide the reader with the current state of the art in the fabrication of high‐T2‐coherence diamond, optimized through the use of double electron–electron resonance (DEER) spectroscopy. We reveal the main as well as yet unidentified spin defects, the reduction of which is essential for reducing the spin bath and fabricating materials for ...
Olga Rubinas, Jeroen Prooth, Michael Petrov, Remy Vandebosch, Emilie Bourgeois, David Chvátil, Milos Nesladek   +6 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

Measurement of longitudinal nuclear spin relaxation time in NMR gyroscope by real-time monitoring

AIP Advances, 2022
In the atomic cell of a nuclear magnetic resonance gyroscope, a transverse bias field is applied to enable the in situ alkali magnetometer to sense the variations in the longitudinal magnetic field.
Yang Zhang, Jintao Zheng, Zaiyang Yu, Zhiqiang Xiong, Zhiguo Wang, Hui Luo   +5 more
doaj   +1 more source