Results 161 to 170 of about 1,128 (203)
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Magnetic after effect of giant magnetoimpedance in amorphous wires
Journal of Magnetism and Magnetic Materials, 2003Abstract 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 +3 more
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Giant magnetoimpedance effect in soft and ultrasoft magnetic fibers
Journal of Applied Physics, 1996Soft 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 +7 more
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Giant magnetoimpedance effect in La–Ba–Mn–O oxide
Materials Science and Engineering: B, 2000Abstract In the present work, the giant magnetoimpedance effect is observed in La 0.65 Ba 0.35 MnO 3 sintered oxide. The change ratio of the magnetoimpedance ∣ Z ( H )− Z (0)∣/ Z (0) of the La 0.65 Ba 0.35 MnO 3 oxide can reach the value 10.3% at H =0.85 kOe.
Jifan Hu, Hongwei Qin, Yaming Zhang
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A giant magnetoimpedance effect based nonvolatile Boolean logic gate
Journal of Physics D: Applied Physics, 2019The biphase magnetic heterostructure (Ni/Fe20Ni45Co25Si2B8/micro-planar coil/Fe20Ni45Co25Si2B8/micro-planar coil/Fe20Ni45Co25Si2B8/Ni) bonded with a pair of thin magnets shows improved asymmetric and hysteretic giant magnetoimpedance (GMI) effect with respect to external dc magnetic field.
Yao Wang +5 more
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Optimized giant magnetoimpedance effect in amorphous and nanocrystalline materials
Journal of Applied Physics, 2006This letter reports the giant magnetoimpedance (GMI) effect and its magnetic response in optimized Co70Fe5Si15Nb2.2Cu0.8B7 amorphous and Fe71Al2Si14B8.5Cu1Nb3.5 nanocrystalline ribbons. At a given frequency of 5 MHz, the largest GMI ratios of 513% and 640% were observed for the Co-based amorphous and Fe-based nanocrystalline samples, respectively. More
Phan, MH +3 more
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Giant magnetoimpedance effect in La0.7Ca0.3MnO3 under low magnetic fields
Journal of Magnetism and Magnetic Materials, 2001Abstract The sintered La 0.7 Ca 0.3 MnO 3 shows a relaxational frequency dependence of the impedance at room temperature. Below a certain frequency, the La 0.7 Ca 0.3 MnO 3 shows a positive magnetoimpedance effect. On the contrary, negative magnetoimpedance effects occur at high frequencies.
Jifan Hu, Hongwei Qin
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Investigation of surface effect on giant magnetoimpedance in microwires
Journal of Magnetism and Magnetic Materials, 2014Abstract 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 +3 more
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Temperature effect on the giant magnetoimpedance in amorphous materials
IEEE International Digest of Technical Papers on Magnetics Conference, 2003Summary form only given. We measure the GMI ratio in a weak-field-annealed amorphous sample as a function of the measuring temperature over room temperature and discuss the change of GMI ratio in terms of the change of domain wall motions and rotational magnetization.
Y.W. Rheem +4 more
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Optimization of Giant Magnetoimpedance Effect in Fe-rich Microwires
2018 International Conference on Electromagnetics in Advanced Applications (ICEAA), 2018We observed remarkable optimization of the magnetic softness in Fe-rich magnetic microwires by stress-annealing. It is found that the as-prepared Fe-rich microwires present rectangular hysteresis loops. The magnetic softness and magnetoimpedance effect of the Fe-rich microwires can be considerably improved by annealing.
Arcady Zhukov +5 more
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Domain wall permeability limit for the giant magnetoimpedance effect
Journal of Applied Physics, 2002The magnetoimpedance (MI) effect is based on the change of inductance and resistance under the effect of an external magnetic field. In bulk homogeneous wires or ribbons these two components of the impedance are related to the penetration depth of the electromagnetic field in the material.
J. M. Barandiarán +4 more
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