Amorphous Magnetoelastic Materials

1994 ◽  
Vol 360 ◽  
Author(s):  
H. T. Savage ◽  
Marilyn Wun-Fogle
Keyword(s):  
Magnetic Field ◽  
Melt Spinning ◽  
High Sensitivity ◽  
Low Noise ◽  
Tactile Sensors ◽  
Magnetic Anisotropy Energy ◽  
Magnetic Field Sensors ◽  
Crystalline Materials ◽  
Magnetoelastic Materials ◽  
Very High

AbstractThe outstanding feature of amorphous magnetoelastic alloys is the controllability of the magnetic anisotropy energy, Curie point, magnetostriction and magnetic moment. This control of material characteristics, achieved by magnetic and stress annealing plus changes incomposition, is impossible in crystalline materials. The control allows the design of tactile and magnetic field sensors with special features and very high sensitivity. The materials discussed are prepared by rapid solidification through melt spinning in ribbon and wire geometries and magnetron sputtering onto substrates. As an example of the advantagesof sputtered material, an accelerometer on silicon micro-cantilevers is shown. I-t has nocoils. The basic magnetoelastic theory that governs tactile sensors is shown. Low-noise magnetic field sensors with novel twist anisotropies and Barkhausen instabilities in wiresare discussed.

A permendur-piezoelectric multiferroic composite for low-noise ultrasensitive magnetic field sensors

2012 ◽  
Vol 100 (17) ◽  
pp. 173506 ◽  
Author(s):  
G. Sreenivasulu ◽  
U. Laletin ◽  
V. M. Petrov ◽  
V. V. Petrov ◽  
G. Srinivasan
Keyword(s):  
Magnetic Field ◽  
Low Noise ◽  
Magnetic Field Sensors ◽  
Multiferroic Composite

scholarly journals Magnetic Communication Using High-Sensitivity Magnetic Field Detectors

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3415 ◽  
Author(s):  
Maurice Hott ◽  
Peter A. Hoeher ◽  
Sebastian F. Reinecke
Keyword(s):  
Magnetic Field ◽  
Mobile Applications ◽  
Data Communication ◽  
High Sensitivity ◽  
Magnetic Data ◽  
Receiver Coil ◽  
Magnetic Field Sensors ◽  
Resistive Sensor ◽  
Field Sensor ◽  
Multiple Detectors

In this article, an innovative approach for magnetic data communication is presented. For this purpose, the receiver coil of a conventional magneto-inductive communication system is replaced by a high-sensitivity wideband magnetic field sensor. The results show decisive advantages offered by sensitive magnetic field sensors, including a higher communication range for small receiver units. This approach supports numerous mobile applications where receiver size is limited, possibly in conjunction with multiple detectors. Numerical results are supported by a prototype implementation employing an anisotropic magneto-resistive sensor.

scholarly journals Magnetoelectric Magnetic Field Sensors: A Review

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6232
Author(s):  
Mirza Bichurin ◽  
Roman Petrov ◽  
Oleg Sokolov ◽  
Viktor Leontiev ◽  
Viktor Kuts ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Lithium Niobate ◽  
Electric Fields ◽  
Quantum Interference ◽  
High Sensitivity ◽  
Electric Polarization ◽  
New Materials ◽  
Magnetic Field Sensors ◽  
Superconducting Quantum Interference Devices ◽  
Superconducting Quantum Interference

One of the new materials that have recently attracted wide attention of researchers are magnetoelectric (ME) composites. Great interest in these materials is due to their properties associated with the transformation of electric polarization/magnetization under the influence of external magnetic/electric fields and the possibility of their use to create new devices. In the proposed review, ME magnetic field sensors based on the widely used structures Terfenol—PZT/PMN-PT, Metglas—PZT/PMN-PT, and Metglas—Lithium niobate, among others, are considered as the first applications of the ME effect in technology. Estimates of the parameters of ME sensors are given, and comparative characteristics of magnetic field sensors are presented. Taking into account the high sensitivity of ME magnetic field sensors, comparable to superconducting quantum interference devices (SQUIDs), we discuss the areas of their application.

Micro-structured optical fiber magnetic field sensor based on magnetic fluid filling

2019 ◽  
Vol 33 (31) ◽  
pp. 1950380
Author(s):  
Jie Wang ◽  
Zhen Zhang ◽  
Shuguang Li ◽  
Shun Wang
Keyword(s):  
Magnetic Field ◽  
Magnetic Fluid ◽  
High Sensitivity ◽  
Magnetic Field Sensor ◽  
The Finite Element Method ◽  
Average Sensitivity ◽  
Magnetic Field Sensors ◽  
Hole Radius ◽  
Field Sensor ◽  
Air Hole

A novel micro-structured fiber magnetic field sensor based on magnetic fluid (MF) filling is proposed. The air hole radius in the cladding of fiber is reduced from inner layer to outer layer, and the numerical analysis is performed by the finite element method (FEM). For the [Formula: see text]-pol mode, the proposed sensor has an average sensitivity of 960.61 pm/Oe, and for the [Formula: see text]-pol mode, the average sensitivity can reach 884.85 pm/Oe. The sensor has the advantages of small size and high sensitivity and is competitive in magnetic field sensors.

High-Sensitivity Tunnel Magnetoresistance Sensors Based on Double Indirect and Direct Exchange Coupling Effect*

2021 ◽  
Vol 38 (12) ◽  
pp. 128501
Author(s):  
Xiufeng Han ◽  
Yu Zhang ◽  
Yizhan Wang ◽  
Li Huang ◽  
Qinli Ma ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Noise Level ◽  
Exchange Coupling ◽  
Coupling Effect ◽  
High Sensitivity ◽  
Wheatstone Bridge ◽  
Low Noise ◽  
Magnetic Sensors ◽  
Tunnel Magnetoresistance ◽  
Current Detection

Abstract Detection of ultralow magnetic field requires magnetic sensors with high sensitivity and low noise level, especially for low operating frequency applications. We investigated the transport properties of tunnel magnetoresistance (TMR) sensors based on the double indirect exchange coupling effect. The TMR ratio of about 150% was obtained in the magnetic tunnel junctions and linear response to an in-plane magnetic field was successfully achieved. A high sensitivity of 1.85%/Oe was achieved due to a designed soft pinned sensing layer of CoFeB/NiFe/Ru/IrMn. Furthermore, the voltage output sensitivity and the noise level of 10.7 mV/V/Oe, 10 nT/Hz1/2 at 1 Hz and 3.3 nT/Hz1/2 at 10 Hz were achieved in Full Wheatstone Bridge configuration. This kind of magnetic sensors can be used in the field of smart grid for current detection and sensing.

scholarly journals Fiberized Diamond-Based Vector Magnetometers

2021 ◽  
Vol 2 ◽  
Author(s):  
Georgios Chatzidrosos ◽  
Joseph Shaji Rebeirro ◽  
Huijie Zheng ◽  
Muhib Omar ◽  
Andreas Brenneis ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Sensitivity ◽  
Field Vector ◽  
Nitrogen Vacancy ◽  
Double Quantum ◽  
Optical Fibres ◽  
Vector Magnetic Field ◽  
Magnetic Field Sensors ◽  
Halbach Array ◽  
Quantum Transitions

We present two fiberized vector magnetic-field sensors, based on nitrogen-vacancy (NV) centers in diamond. The sensors feature sub-nT/Hz magnetic sensitivity. We use commercially available components to construct sensors with a small sensor size, high photon collection, and minimal sensor-sample distance. Both sensors are located at the end of optical fibres with the sensor-head freely accessible and robust under movement. These features make them ideal for mapping magnetic fields with high sensitivity and spatial resolution (≤ mm). As a demonstration we use one of the sensors to map the vector magnetic field inside the bore of a ≥100 mT Halbach array. The vector field sensing protocol translates microwave spectroscopy data addressing all diamonds axes and including double quantum transitions to a 3D magnetic field vector.

New Slow-Scan CCD Cameras (SSC) with Frame/Interline CCD Architecture Avoid TEM Shutter Control, Provide Excellent Image Quality and can be Easily Retrofitted

1999 ◽  
Vol 5 (S2) ◽  
pp. 350-351
Author(s):  
S.A. Hiller ◽  
W. Probst ◽  
V. Seybold ◽  
E. Zellmann
Keyword(s):  
Digital Images ◽  
High Sensitivity ◽  
Low Noise ◽  
Direct Access ◽  
High Quality ◽  
Quantitative Image ◽  
On Line ◽  
High Dynamic ◽  
Very High ◽  
Holographic Reconstruction

Since it's introduction into TEM in 1986 [1] SSCs have become an effective and easy-to-use solution for acquiring high quality digital images electronically. Their main advantages are excellent linearity, very high dynamic, high sensitivity, and low noise. These advantages have made SSCs a nondispensable tool for quantitative image analysis. Moreover, since SSCs make high quality TEM images available in a computer within fraction of seconds, on-line image processing and software driven automated TEM tuning has become possible [2]. Many of the experiments which are performed nowadays in the area of high resolution, low dose, holographic reconstruction, and EFTEM [3] would not be possible without the digital input coming from SSCs.Like recording images with a film sheet camera, digital recording of images with SSC requires control of the TEM beam blanker (shutter) by the SSC synchronised with the image acquisition process.This blanker (shutter) control is a critical link in the chain to the digital image. Many older TEMs do not have direct access to beam blanking coils, or contrary to modern TEMs their coils are not designed to support hysteresis-free fast beam blanking, what is essential for acquisition of high quality digital images by a SSC.

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