Magnetic field meter based on giant magnetoimpedance effect

2008 ◽  
Vol 141 (1) ◽  
pp. 68-75 ◽  
Author(s):  
M. Kuźmiński ◽  
K. Nesteruk ◽  
H.K. Lachowicz
Keyword(s):  
Magnetic Field ◽  
Giant Magnetoimpedance ◽  
Giant Magnetoimpedance Effect

The Bias-Controlled Magnetoimpedance Effect in a MIS Structure

2015 ◽  
Vol 233-234 ◽  
pp. 451-455
Author(s):  
Dmitry A. Smolyakov ◽  
Anton S. Tarasov ◽  
Arthur O. Gustaitsev ◽  
Nikita V. Volkov
Keyword(s):  
Magnetic Field ◽  
Applied Magnetic Field ◽  
Mis Structure ◽  
Giant Magnetoimpedance ◽  
Metal Insulator ◽  
Giant Magnetoimpedance Effect ◽  
The Real ◽  
Mis Diode ◽  
The Magnetic Field ◽  
Pronounced Peak

We report the giant magnetoimpedance effect in a ferromagnetic metal/insulator/semiconductor (MIS) diode with the Schottky barrier based on the Fe/SiO2/n-Si structure. It was established that the applied magnetic field strongly influences the impedance of the structure in the temperature range 10—30 K. In this range, there is the pronounced peak in the temperature dependence of the real part of the impedance at frequencies from 10 Hz to 1 MHz. The effect of the magnetic field manifests itself as a shift of the peak of the real part of the impedance. Under the action of a bias voltage of 5 V, the peak of the real part of the impedance similarly shifts toward lower temperatures with and without applied magnetic field.

GIANT MAGNETOIMPEDANCE EFFECT IN MULTILAYERED STRUCTURE (FM/SiO2)3/Ag/(SiO2/FM)3 FILMS

2005 ◽  
Vol 19 (30) ◽  
pp. 4475-4482
Author(s):  
WEI-PING CHEN ◽  
SHU-QIN XIAO ◽  
WEN-JING WANG ◽  
HUI-MIN YUAN ◽  
YI-HUA LIU
Keyword(s):  
Magnetic Field ◽  
Deposition Process ◽  
Transverse Magnetic ◽  
Multilayered Structure ◽  
Giant Magnetoimpedance ◽  
Multilayered Films ◽  
Giant Magnetoimpedance Effect ◽  
Radio Frequency Sputtering ◽  
Maximum Value ◽  
Different Temperatures

Giant magnetoimpedance (GMI) and giant magnetoreactance (GMX) effects in multilayered structure ( FM/SiO 2)3/ Ag /( SiO 2/ FM )3( FM ≡ Fe 71.5 Cu 1 Cr 2.5 V 4 Si 12 B 9) films have been studied. The multilayered films were deposited by radio frequency sputtering under a constant magnetic field of 900 Oe applied in the plane of the sample perpendicular to its long side (transverse direction) and then annealed under different temperatures. The maximum GMI ratio of 122% was obtained at the frequency of 4.6 MHz. The maximum value of GMX ratio and the sensitivity of GMX ratio, 2578% and 129%/Oe, were obtained in a longitudinal field case at the frequency of 1 MHz, respectively. These superior properties are related to the special structure of the multilayered films and the transverse magnetic field used in the deposition process.

Influence of AC Driving Current on Magneto-Impedance Effect in Glass-Covered Co-Based Microwire

2011 ◽  
Vol 335-336 ◽  
pp. 324-327
Author(s):  
Bin Tian ◽  
Hua Shi
Keyword(s):  
Magnetic Field ◽  
Low Frequency ◽  
Giant Magnetoimpedance ◽  
Double Peak ◽  
Giant Magnetoimpedance Effect ◽  
Driving Current ◽  
Ac Current ◽  
Amorphous Microwires ◽  
The Magnetic Field ◽  
Range Of Values

The influence of ac driving current on the frequency dependence in the range from 0.1 to 20 MHz of the giant magnetoimpedance effect (GMI) of glass-covered amorphous microwires were investigated. The dependence of GMI for a range of values of ac current (from 0.5 mA to 20 mA) flowing along the microwire has been measured in as-prepared samples. The double-peak feature is changed to the single-peak festure and the magnetic field at which the value of GMI reaches a maximum should increase with the higher the amplitude of the ac at low frequency. It was found that the change of GMI related to circular coercivity.

scholarly journals Influence of Various Heat Treatments on Giant Magnetoimpedance Effect in Nanocrystalline FeSiBNbCu Ribbons

1999 ◽  
Vol 32 (1-4) ◽  
pp. 269-279 ◽  
Author(s):  
G. V. Kurlyandskaya ◽  
M. Vázquez ◽  
E. H.C.P. Sinnecker ◽  
A. P. Zhukov ◽  
J. P. Sinnecker ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Zero Field ◽  
Fixed Frequency ◽  
Giant Magnetoimpedance ◽  
Giant Magnetoimpedance Effect ◽  
X Ray ◽  
Induced Magnetic Anisotropy ◽  
Magnetostriction Constant

In this paper we present studies on the frequency dependence of the magneto-impedance in the range of 0.1–2 MHz for Fe73.5Si13.5B9Nb3Cu1 and Fe73.5Si16.5B6Nb3Cu1 nanocrystalline ribbons, which differ in the sign of the magnetostriction constant. As cast samples were annealed in Ar atmosphere at 560℃, with and without an DC and AC magnetic field. At a fixed frequency, an improvement in the field annealed 13.5% Si samples, when compared with the zero field annealed ones, can be observed. On the 16.5% Si field annealed samples only a reduction of magneto-impedance ratio could be observed, when compared to the non-field annealed ones. Analysis of the magnetic properties and X-ray data shows that the observed changes in magneto-impedance effect are consequence of the induced magnetic anisotropy.

scholarly journals Magnetic Field Sensor Using Asymmetric Giant Magnetoimpedance Effect Created by Micro Magnets

2021 ◽  
Author(s):  
Tekin Izgi ◽  
M. Pektas ◽  
V.S. Kolat ◽  
N. Bayri ◽  
S. Atalay
Keyword(s):  
Magnetic Field ◽  
Output Signal ◽  
Magnetic Field Sensor ◽  
Giant Magnetoimpedance ◽  
New Approach ◽  
Giant Magnetoimpedance Effect ◽  
Dc Offset ◽  
Good Linearity ◽  
Field Sensor ◽  
Circuit Output

Abstract A magnetic field sensor was developed using asymmetric giant magnetoimpedance (AGMI) effect. Amorphous ferromagnetic (Fe0.06Co0.94) 72.5Si12.5B15 wires were used in this study. The 2 cm long wire showed about 88 % and the 7 cm long wire showed about 197 % giant magnetoimpedance effect. When two micro magnets were placed 1 cm away from the ends of the wire, a distortion in two peak shapes of the GMI curve was observed and asymmetry was created by micro magnets and 7 cm long wire showed about 148 % AGMI effect. A simple and a new approach was designed to develop a magnetic field sensor, in the design circuit two signal generators were used to arrange linearity and dc offset in the output signal. The circuit output showed good linearity and zero hysteresis at ±250 A/m and ± 50 A/m magnetic field regions for 2cm wires long and 7 cm wires long, respectively.

Excellent Response of Giant Magnetoimpedance Effect in a Glass-Coated Microwire LC-Resonator

2007 ◽  
Vol 124-126 ◽  
pp. 875-878
Author(s):  
Anh Tual Le ◽  
Chong Oh Kim ◽  
Hee Bok Lee
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Resonance Frequency ◽  
Phase Angle ◽  
Resonance Phenomenon ◽  
Giant Magnetoimpedance ◽  
Giant Magnetoimpedance Effect ◽  
Excellent Response ◽  
Sensor Applications ◽  
Lc Resonator

A novel excellent response of giant magnetoimpedance effect was found out in a magnetic LC-resonator consisting of a glass-coated amorphous Co83.2B3.3Si5.9Mn7.6 microwire and two capacitive cylindrical electrodes at the end of the microwire. The shapes of the impedance curves plotted vs. applied external dc-field varied dramatically with increasing frequency. The phase angle was also strongly found to be dependent on this field. The impedance curves were changing abruptly at near the resonance frequency. Because the permeability of ultra soft magnetic microwire is changing rapidly as a function of external magnetic field, the resonance frequency as well as impedance of the LC-resonator also changes drastically with respect to the external magnetic field. The maximum magnetoimpedance ratio value was reached as much as 1,600%. The sudden changes of phase angle as much as 180 degree evidenced the occurrence of resonance phenomenon. These results are promising for developing ultra-high sensitive magnetic sensor applications.

scholarly journals Магнитный импеданс пленочных наноструктур для оценки полей рассеяния микрочастиц магнитных композитов

2022 ◽  
Vol 92 (2) ◽  
pp. 321
Author(s):  
Г.Ю. Мельников ◽  
В.Н. Лепаловский ◽  
Г.В. Курляндская
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Magnetic Composite ◽  
Giant Magnetoimpedance ◽  
Giant Magnetoimpedance Effect ◽  
Magnetic Microparticles ◽  
Stray Magnetic Field ◽  
Weight Concentration ◽  
Maximum Value ◽  
Film Element

Longitudinal giant magnetoimpedance effect of [Fe21Ni79/Cu]5/Cu/[Fe21Ni79/Cu]5 film element was investigated depends on stray magnetic field of epoxy magnetic composite with 30 % weight concentration of iron oxide magnetic microparticles. Configuration of an experiment was a model of thrombus detection in a blood vessel. Stray magnetic field was varied by movement of a magnetic composite above the element perpendicular to the long side. Composite was either magnetized or not to the state of remanence. As the magnetic composite approaches the GMI element, MI ratio curves are smoothed and shifted along the field axis and maximum value of the MI ratio decreases. Magnetic properties of magnetic composite and film element were investigated as well.

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