Results 161 to 170 of about 1,389 (199)

Theory of longitudinal magnetoimpedance in wires

Journal of Applied Physics, 2000
A theory of giant magnetoimpedance (GMI) in anisotropic magnetic wires is presented. The theory is valid over a broad field and frequency range. The emphasis is put on the GMI response in the low field region, where the wire is not saturated. The behavior of the wire may be described using three magnetic modes of mixed electromagnetic and spin wave ...
D. Ménard, A. Yelon
openaire   +2 more sources

Magnetoimpedance effect in La0.7Sr0.3MnO3

Journal of Magnetism and Magnetic Materials, 2001
Abstract The magnetoimpedance effect has been observed in sintered La 0.7 Sr 0.3 MnO 3 under low DC magnetic fields, H 0.7 Sr 0.3 MnO 3 upon application of a DC magnetic field may be connected with the variations of the penetration depth via the permeability.
Jifan Hu, Hongwei Qin
openaire   +1 more source

Frequency dependencies of magnetoimpedance and magnetoimpedance phase in amorphous (Co0.85Fe0.06Cr0.02Ni0.07)75Si10B15 ribbon

Solid State Communications, 2000
Abstract In the present work, the magnetoimpedance effects in the amorphous (Co0.85Fe0.06Cr0.02Ni0.07)75Si10B15 ribbon has been investigated. Results show that three frequency dependencies of the change ratios of magnetoimpedance, magnetoresistance and magnetoreactance intersect at a certain frequency where the change ratio of magnetoimpedance phase ...
Jifan Hu, Hongwei Qin, Liansheng Zhang, Yizhong Wang, Zhenxi Wang   +4 more
openaire   +1 more source

Application of the magnetoimpedance to biosensors

Journal of the Korean Physical Society, 2012
A prototype of a giant magnetoimpedance (GMI) biosensor was designed and tested using an amorphous ribbon. The GMI response was measured with a suspension containing a CM01N/9077 bead from Bangs Laboratories. This bead was coated with streptavidin so that it could be used as biomolecular label with a specific antibody.
Hoon Song, Duck-gun Park
openaire   +1 more source

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

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

Modeling the magnetoimpedance in anisotropic wires

Journal of Applied Physics, 2000
We have developed a theory of giant magnetoimpedance (GMI) in ideal anisotropic magnetic wires, which is valid over a broad field and frequency range. The emphasis is put on the moderate frequency GMI response in the low field region, where the wire is not saturated.
D. Ménard, L. G. C. Melo, M. R. Britel, P. Ciureanu, A. Yelon, M. Rouabhi, R. W. Cochrane   +6 more
openaire   +1 more source

A position sensor based on magnetoimpedance

Journal of Applied Physics, 1996
A magnetic-field sensor based on the giant magnetoimpedance phenomenon is presented. It is shown that a low, negative magnetostriction CoFeBSi amorphous wire can be used to detect the presence or passage of moving pieces or vehicles, simply by pasting a small permanent magnet on the vehicles/pieces.
R. Valenzuela, M. Vazquez, A. Hernando
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

Advances in Giant Magnetoimpedance of Materials

2015
Abstract The giant magnetoimpedance (GMI) effect consisting of the large change of both real and imaginary parts of the impedance upon the application of static magnetic field has attracted recent few years' considerable attention. An updated review on GMI was presented.
A. Zhukov, M. Ipatov, V. Zhukova
openaire   +1 more source