Results 161 to 170 of about 2,372 (184)

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
openaire   +1 more source

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.
openaire   +2 more sources

Magnetoimpedance of metallic ferromagnetic wires

Physical Review B, 1998
The ac impedance $Z=R+j\ensuremath{\omega}L$ of a metallic soft magnetic wire with periodic circular domains relevant to domain-wall displacements is calculated and compared with the classical model relevant to domain magnetization rotations (DMR). It is shown that the magnetoimpedance (MI) defined as the relative change of $|Z|$ with a longitudinal dc
D.-X. Chen, J. L. Muñoz, A. Hernando, M. Vázquez   +3 more
openaire   +1 more source

High-frequency magnetoimpedance in nanocomposites

Journal of Magnetism and Magnetic Materials, 2006
Abstract The transmission of millimeter-range electromagnetic waves (30–50 GHz) through a magnetic nanocomposite thin film exhibiting tunnel magnetoresistance (TMR) is calculated. The relative change of transmission coefficient in an applied magnetic field due to the magnetorefractive effect is approximately linear with TMR and strongly depends on ...
Alexey Yurasov, Alexander Granovsky, Sergey Tarapov, Jean-Pierre Clerc   +3 more
openaire   +1 more source

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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Magnetoimpedance measurements of ferromagnetic resonance and antiresonance

Applied Physics Letters, 2000
We report the observation of both ferromagnetic resonance and antiresonance in a magnetic metal using a magnetoimpedance technique. In this experiment, the magnetoimpedance was measured as the frequency was swept from 30 MHz to 11 GHz at constant magnetic fields ranging up to 1.1 kOe (88 kA/m).
M. R. Britel, D. Ménard, L. G. Melo, P. Ciureanu, A. Yelon, R. W. Cochrane, M. Rouabhi, B. Cornut   +7 more
openaire   +1 more source

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
openaire   +2 more sources

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 and inductance spectroscopy

Journal of Alloys and Compounds, 2004
A brief review of the giant magnetoimpedance (GMI) phenomenon is presented, including the general definition and phenomenology. The change from impedance modulus to complex inductance is presented, which allows a clearer view of the physics involved.
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Giant magnetoimpedance in a MnZn ferrite

Journal of Magnetism and Magnetic Materials, 2006
Abstract Giant magnetoimpedance (GMI) effect has been observed in a MnZn ferrite at room temperature. The magnetoimpedance Δ Z / Z 0 reaches −61.2% at a frequency f = 4 MHz under a field H = 3 kOe . The GMI in MnZn ferrite is connected not only with the field induced permeability variation, but also ...
Jifan Hu, Hongwei Qin, Guanquan Qi, Minhua Jiang   +3 more
openaire   +1 more source