Results 41 to 50 of about 20,213 (251)

Three-axis magnetic field measurement based on dual-pump polarization with high sensitivity and orthogonality

Results in Physics, 2023
An optically pumped magnetometer (OPM) for three-axis magnetic field measurement is demonstrated based on dual-pump polarization in a time-sharing regime.
Siran Li, Bozheng Xing, Xiujie Fang, Kun Wang, Yanan Gao, Quan Wei, Bangcheng Han   +6 more
doaj   +1 more source

Optical Signature of Moiré Superlattices Formed by Twisted SrTiO3 Membranes

Advanced Functional Materials, EarlyView.
We discover optical signatures from bonded interfaces in twisted SrTiO3 moiré superlattices, including low‐frequency Raman vibrational modes and strong second‐harmonic generation, consistent with strong interlayer coupling inferred from cross‐sectional electron microscopy and ab initio calculations. ABSTRACT Moiré superlattices formed at the interfaces
T. A. M. Ragib Shahriar, Fumikazu Murakami, Xing He, Konnor Koons, Xinyan Li, Bumseop Kim, Shihan Qin, Varun Harbola, Jochen Mannhart, Yimo Han, Ruijuan Xu, Shengxi Huang, Andrew M. Rappe, Hanyu Zhu   +13 more
wiley   +1 more source

Nuclear Magnetic Resonance Study of the Transition from Bulk- to Surface-Dominated Relaxation of Hydrogen in Micron-Scale Pores

Magnetochemistry
Understanding the proton relaxation mechanism of hydrogen gas in porous media is critical for underground hydrogen storage. This study investigates the proton relaxation mechanisms of hydrogen gas using variable-pressure NMR experiments on idealized ...
Yubing Liu, Chenyu Xu, Gong Zhang
doaj   +1 more source

Flat-response spin-exchange relaxation free atomic magnetometer under negative feedback

Optics Express, 2014
We demonstrate that the use of negative feedback extends the detection bandwidth of an atomic magnetometer in a spin-exchange relaxation free (SERF) regime. A flat-frequency response from zero to 190 Hz was achieved, which is nearly a three-fold enhancement while maintaining sensitivity, 3 fT/Hz1/2 at 100 Hz.
Lee, Hyun Joon, Shim, Jeong Hyun, Moon, Han Seb, Kim, Kiwoong   +3 more
openaire   +3 more sources

Ultrawide Bandwidth Optomechanical Magnetometry Using Flux Concentration

Advanced Functional Materials, EarlyView.
High‐permeability flux concentrators enable ultrawide‐bandwidth chip‐scale optomechanical magnetometry by exploiting magnetic nonlinearity to up‐convert low‐frequency fields to the mechanical resonance, where sensitivity is optimal. This enables flat wideband operation over more than four orders of magnitude, from tens of kilohertz to sub‐hertz ...
Benjamin J. Carey, Nathaniel Bawden, Fernando Gottardo, James S. Bennett, Douglas Bulla, Scott Foster, Warwick P. Bowen   +6 more
wiley   +1 more source

Cross-Axis projection error in optically pumped magnetometers and its implication for magnetoencephalography systems

NeuroImage, 2022
Optically pumped magnetometers (OPMs) developed for magnetoencephalography (MEG) typically operate in the spin-exchange-relaxation-free (SERF) regime and measure a magnetic field component perpendicular to the propagation axis of the optical-pumping ...
Amir Borna, Joonas Iivanainen, Tony R. Carter, Jim McKay, Samu Taulu, Julia Stephen, Peter D.D. Schwindt   +6 more
doaj   +1 more source

Si‐Doped Nanocrystalline Diamond as Highly Sensitive Luminescence Thermometer for the Physiological Temperature Range

Advanced Functional Materials, EarlyView.
In this work, diamonds with negative charged silicon‐vacancy (SiV−) centers have been designed for use as thermometers in biomedical applications. Multiparametric analysis of the emission characteristics of the SiV− centers provides extraordinary sensitivity for temperature detection in the physiological temperature range.
María Gragera, Iván Carrillo‐Berdugo, Josue Millán, Paulius Pobedinskas, Antonio Freire, Ken Haenen, Javier Navas   +6 more
wiley   +1 more source

Multilayer Spindle Shaped Magnetic Shielding Device for SERF Atomic Magnetometer Application

IEEE Access, 2020
Most of shielding devices currently used for SERF magnetometers are multilayer cylindrical magnetic shielding barrels. This article studies a new multilayer spindle shaped magnetic shielding barrel for the spin exchange relaxation free (SERF ...
Zhengkun Fan, Jun Xu, Xiangyu Kang, Zhanfei Zhang, Yang Li, Xiangmei Dong, Xiumin Gao   +6 more
doaj   +1 more source

Fast In-Situ Triaxial Remanent Magnetic Field Measurement for Single-Beam SERF Atomic Magnetometer Based on Trisection Algorithm

Photonic Sensors, 2023
We demonstrate a method for quickly and automatically detecting all three components of a remanent magnetic field around a shielded spin-exchange relaxation-free (SERF) atomic magnetometer (AM) using the trisection algorithm (TSA) for zero-field ...
Tengyue Long, Bangcheng Han, Xinda Song, Yuchen Suo, Le Jia   +4 more
doaj   +1 more source

Catalytically Enhanced Near Room‐Temperature Hydrogen Sensing Using Pd‐ZnO Colloidal Crystals

Advanced Functional Materials, EarlyView.
Pd‐decorated ZnO colloidal crystal monolayers demonstrate excellent performance across a wide hydrogen concentration range at 33°C, with high selectivity and reproducible device fabrication. The sensors show strong responses even at low‐ppm H2 concentrations and an ultra‐low detection limit of 82 ppb, indicating their suitability for diverse hydrogen ...
Hamidah Alluhaybi, Samuel J. Ippolito, Chung Kim Nguyen, Durairaj Mahendiran, Michelle J. S. Spencer, Edwin L. H. Mayes, Billy James Murdoch, Jason Choi, Shamali De Silva, James Tardio, Adrian Trinchi, Ahmad E. Kandjani, Mohammad Al Kobaisi, Ylias Sabri   +13 more
wiley   +1 more source