Results 151 to 160 of about 554 (191)

Magnetic sensor based on giant magnetoimpedance effect

2008 8th International Symposium on Antennas, Propagation and EM Theory, 2008
A giant magnetoimpedance (GMI) magnetic sensor is designed in the present work. Differing from the previously reported sensors, a couple of permanent magnets are applied to provide a bias magnetic field for the sensor probe which consists of commercial amorphous ribbon.
null Bing Han, null Tao Zhang
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Investigation of surface effect on giant magnetoimpedance in microwires

Journal of Magnetism and Magnetic Materials, 2014
Abstract Previous work from our group suggested that the giant magnetoimpedance (GMI) response of soft ferromagnetic microwires could be improved by removing a hypothetical hard magnetic shell on the surface of the cylindrical conductors. Therefore, we have been trying to increase the sensitivity of our samples by exposing them to a mild plasma ...
M. Tousignant, O. Zabeida, G. Rudkowska, A. Yelon   +3 more
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Giant magnetoimpedance effect enhancement by circuit matching

Sensors and Actuators A: Physical, 2003
GMI response of amorphous wires can be greatly increased by working at resonant conditions in a LC cell. This feature of the circuit can be exploited to increase the sensibility of current GMI-based sensors while selecting the working frequency.
V. Raposo, M. Vázquez, A.G. Flores, M. Zazo, J.I. Iñiguez   +4 more
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Effect of annealing on magnetic properties and Giant magnetoimpedance effect of amorphous microwires

2013 Seventh International Conference on Sensing Technology (ICST), 2013
We studied Giant magnetoimpedance (GMI) effect and magnetic properties of amorphous Fe-Co rich as-prepared and annealed microwires. We measured the GMI magnetic field and frequency dependences, hysteresis loops and domain walls (DWs) dynamics of composite microwires produced by the Taylor-Ulitovski technique.
Ahmed Talaat, Valentina Zhukova, Mihail Ipatov, Juan Maria Blanco, Arcady Zhukov   +4 more
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Anisotropic magnetoresistance and giant magnetoimpedance effects in soft magnetic fibers

Journal of Magnetism and Magnetic Materials, 1996
Abstract Soft magnetic fibers with different compositions have been cast by melt extraction. An anisotropic magnetoresistance effect (AMR) of about 3% was measured in NiFe fibers and employed to propose a model for their anisotropy and magnetization process.
P. Rudkowski, P. Ciureanu, G. Rudkowska, M. Britel, D. Menard, J.O. Ström-Olsen, A. Yelon   +6 more
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Magnetic after effect of giant magnetoimpedance in amorphous wires

Journal of Magnetism and Magnetic Materials, 2003
Abstract Time dependence of the giant magnetoimpedance (GMI) in Co 68.15 Fe 4.35 Si 12.55 B 15 amorphous wires is studied here. Magnetoimpedance measurements were performed for different frequencies, from 0.1 to 10 MHz. The maximum relative variation of the GMI for this sample is about 130% at 0.1 MHz, the frequency at which magnetic after effect ...
V Raposo, A.G Flores, M Zazo, J.I Iñiguez   +3 more
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Hall and giant magnetoimpedance effects in the Co70Fe5Si15B10 metallic glass

Journal of Non-Crystalline Solids, 2006
Abstract The transversal giant magnetoimpedance and the Hall effects of a high magnetic permeability metallic glass, Co 70 Fe 5 Si 15 B 10 , were measured as a function of the frequency ( f ) and amplitude of ac electrical current ( I ac ). The room temperature data were obtained for 0.01 ⩽  f  ⩽ 100 kHz, 0.5 ⩽  I ac  ⩽ 45 mA and for applied ...
L.A.P. Gonçalves, J.M. Soares, F.L.A. Machado, A.R. Rodrigues   +3 more
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Effect of nanocrystallization on giant magnetoimpedance effect of Fe-based microwires

Intermetallics, 2014
abstract We studied giant magnetoimpedance (GMI) effect and magnetic properties of Fe 70.8 Cu 1 Nb 3.1 Si 14.5 B 10.6 and Fe 71.8 Cu 1 Nb 3.1 Si 15 B 9.1 Finemet microwires. We observed that GMI effect and magnetic softness ofglass-coated microwires produced by the TayloreUlitovski technique can be tailored either controllingmagnetoelastic anisotropy ...
A. Talaat, V. Zhukova, M. Ipatov, J.J. del Val, L. Gonzalez-Legarreta, B. Hernando, J.M. Blanco, A. Zhukov   +7 more
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Giant magnetoimpedance effect in soft and ultrasoft magnetic fibers

Journal of Applied Physics, 1996
Soft NiFe-Permalloy fibers and ultrasoft NiCo-based amorphous fibers, having a circular cross section with 30–40 μm in diameter, have been cast by melt extraction. The fibers have been driven by a sinusoidal current with 20 mApp constant amplitude and frequencies from 0.1 to 100 MHz.
P. Ciureanu, P. Rudkowski, G. Rudkowska, D. Menard, M. Britel, J. F. Currie, J. O. Ström-Olsen, A. Yelon   +7 more
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Giant magnetoimpedance effect in nanocrystalline Fe74SixB22−xCu1Nb3 ribbons

Journal of Applied Physics, 1997
We investigated the magnetoimpedance (MI) effect for the soft magnetic nanocrystalline Fe74SixB22−xCu1Nb3 (x=4–18) alloys, and also the relationship between the magnetic properties and the MI effect. The annealing temperature dependence of the MI ratio corresponds to that of the permeability of longitudinal direction of the samples.
Y. Ueda, S. Ikeda, W. Takakura
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