Results 1 to 10 of about 1,389 (199)

Magnetoimpedance effect in Nanoperm alloys

Journal of Magnetism and Magnetic Materials, 2006
Abstract The influence of isothermal annealing (1 h at 600 °C in Ar atmosphere) on the soft magnetic properties and magnetoimpedance (MI) effect has been studied in ribbons of the following Nanoperm alloys: Fe 91 Zr 7 B 2 , Fe 88 Zr 8 B 4 , Fe 87 Zr 6 B 6 Cu 1 and Fe 80 Zr 10 B 10 .
B. Hernando, P. Alvarez, J.D. Santos, P. Gorría, M.L. Sánchez, J. Olivera, M.J. Pérez, V.M. Prida   +7 more
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Internal magnetoimpedance of amorphous wires

IEEE Transactions on Magnetics, 2003
Analysis of the usual experimental method to quantify the giant magnetoimpedance (GMI) effect indicates that at high enough working frequencies the values of the impedance can be largely influenced by parasitic impedances of the circuit that affect significantly the analysis of the data.
V. Raposo, J.I. Iniguez, D. Garcia, A.G. Flores, M. Vazquez   +4 more
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Giant magnetoimpedance in silicon steels

Journal of Magnetism and Magnetic Materials, 2004
Abstract Giant magnetoimpedance (GMI) has been measured in pieces of silicon steel (4.5% Si) as functions of axial static magnetic field, sample width, frequency and magnitude of the AC driving current. The samples, 0.5×35 mm with widths ranging from 0.122 to 1.064 mm, were cut from sheets of commercial transformer cores. The impedance decreased with
P. Jantaratana, C. Sirisathitkul
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Advanced Magnetoimpedance Sensors

2015
This thesis is concerned with the advanced topics of thin film magnetoimpedance (MI) sensors. The author proposes and develops novel MI sensors that target on the challenges arising from emerging applications such as flexible electronics, passive wireless sensing, etc.
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Magnetoimpedance simulations in wires and tubes

Journal of Magnetism and Magnetic Materials, 2002
Numerical computations have been used to study the magnetoimpedance (MI) effect in magnetic wires and microtubes. Two kinds of wires have been investigated. In the first case, a typical amorphous wire with a core-shell structure is simulated, considering the different magnetization curve of each layer, and in the second case, a non-magnetic wire with a
J.L. Muñoz, J.M. Barandiarán, G.V. Kurlyandskaya, A. Garcı́a-Arribas   +3 more
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Magnetoimpedance effect in semiconducting La0.4Sr0.6MnO3

Materials Science and Engineering: B, 2002
Abstract In the present work, it was found that for La 0.4 Sr 0.6 MnO 3 , the dc resistance decreases with increasing temperature, from 77 to 280 K. Different from the case of metallic La 0.65 Sr 0.35 MnO 3 , the ac impedance of the semiconducting La 0.4 Sr 0.6 MnO 3 at room temperature decreases with increasing frequency, from 100 kHz to 12 MHz ...
Jifan Hu, Hongwei Qin
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Asymmetric magnetoimpedance in exchange-biased systems

Journal of Physics: Condensed Matter
Abstract Magnetic systems with competing anisotropies generally exhibit asymmetry between the maximum amplitudes of the right and left maxima in a magnetoimpedance curve. Small errors in positioning the samples at the experimental setup may also produce such asymmetry.
J P Gazola, M S Santos, A M H de Andrade, A Harres, R B da Silva, J N Rigue, M Carara   +6 more
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Magnetoimpedance effect in Fe flakes

Journal of Magnetism and Magnetic Materials, 2002
Abstract In the present paper the magnetoimpedance (MI) effect in Fe flakes is reported. The ratios of MI (Z(0)−Z(0.8 kOe ))/Z(0) , magnetoresistance (R(0)−R(0.8 kOe ))/R(0) and magnetoreactance (X(0)−X(0.8 kOe ))/X(0) almost intersect at a frequency of about 4 MHz, where the (Z(0)−Z(0.8 kOe ))/Z(0) reaches its ...
Jifan Hu, Hongwei Qin
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Giant Magnetoimpedance Sensors and Their Applications

2016
Since GMI changes as a function of external dc magnetic field or applied dc/ac current, it is possible to design and produce GMI-based sensors that can measure either magnetic fields or dc/ac currents. GMI also changes sensitively with applied stress, and this provides a new opportunity to develop stress sensors.
Hua-Xin Peng, Faxiang Qin, Manh-Huong Phan   +2 more
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The analysis of magnetoimpedance by equivalent circuits

Journal of Magnetism and Magnetic Materials, 2002
Abstract Simple circuits formed by resistors, inductors and capacitors can be used to model giant magnetoimpedance (GMI) with a good approximation. Three different circuits are found to represent GMI in the whole frequency range (100 Hz–9 GHz) and the AC magnetic field amplitude range (0.01–7.22 A/m RMS): a series R s C s L s , a parallel R p
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