Magnetoimpedance effect in amorphous and nanocrystalline ribbons

Hernando, B.; Sánchez, Marı́a Luisa Fernández; Prida, V.M.; Tejedor, M.; Vázquez, M.

doi:10.1063/1.1408594

Cited by 66 publications

(37 citation statements)

References 32 publications

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“…The application of a magnetic bias field (MI) instead of a torsional stress (TI) has a similar effect: there is a maximum of the spectra at a certain f x frequency, above which the magnetization processes are mainly due to moment rotation. This peculiar behaviour has also been found in ribbon-shaped samples [35].…”

Section: Frequency Dependence Of Magnetoimpedance and Torsion-impedancesupporting

confidence: 67%

Magnetoimpedance in soft magnetic amorphous and nanostructured wires

et al. 2011

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The surface impedance tensor approach has been used to review the impedance response in a variety of amorphous and nanocrystallized wires. An experimental study on the torsion annealing effect on the magnetoimpedance (MI) behaviour for positive and negative magnetostriction amorphous wires of FeSiB and CoSiB compositions, respectively, has been carried out. Moreover, the influence of the onset nanocrystallization on the MI behaviour in Finemet-type alloys, with particular attention focussed on the case that the wires are annealed under applied torsional stress, is also presented. The analysis of the MI and torsion-impedance (TI) effects allows us to compare the different magnetic characteristics observed in a variety of wires. Special attention is paid to new results of the off-diagonal MI huge responses of these ferromagnetic samples, which are also a very useful source of information on the magnetic properties of the wires.

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Section: Frequency Dependence Of Magnetoimpedance and Torsion-impedancesupporting

confidence: 67%

Magnetoimpedance in soft magnetic amorphous and nanostructured wires

et al. 2011

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“…34 In our case, this is true for the 18 at. % Co containing alloy, however, because the domain wall stabilization phenomena affect the position of the maximum value of MIR, 35 it is not possible to affirm the same for the 39 and 60 at.…”

Section: A Amorphous Samplesmentioning

confidence: 50%

“…This fall in the GMI effect has been associated with the disappearance of the contribution of the domain wall motion to the magnetization process at high frequencies. 15,34 Therefore, the measuring frequency was changed from 0.5 to 5 MHz in the magnetoimpedance experiments. A continuous increase in MIR was observed as the applied frequency is increased, confirming that the domain wall motion is a contributing mechanism to the magnetization process at 1 MHz and, therefore, the domain wall stabilization is a suitable explanation for the magnetic hardening of the high Co content alloys.…”

Section: A Amorphous Samplesmentioning

confidence: 99%

Soft magnetic properties of high-temperature nanocrystalline alloys: Permeability and magnetoimpedance

Blázquez¹,

Franco²,

Conde³

et al. 2003

Journal of Applied Physics

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Articles you may be interested inEffect of magnetic field annealing methods on soft magnetic properties for nanocrystalline (Fe0.5Co0.5)73.5Si13.5B9Nb3Cu1 alloy J. Appl. Phys. 117, 17B729 (2015) The technological applicability of FeCoNbBCu alloys is suggested in terms of measurements of room temperature magnetoimpedance and temperature dependence of magnetic permeability r . Results for the Fe 78-x Co x Nb 6 B 15 Cu 1 alloy series show that room temperature soft magnetic properties are enhanced in the lowest Co containing alloy ( r ϳ10 500 and magnetoimpedance ratio ϳ60% at 1 MHz͒. However, permeability exhibits a smoother thermal dependence in the alloys with medium and high Co content. A tradeoff between magnetic softness and its thermal stability reveals the alloy with 39 at. % Co as the most suitable composition among those studied, characterized by a temperature coefficient of ϳ 0.02%/K from room temperature up to 900 K. This value is 1 order of magnitude smaller than those observed for FeSiBCuNb ͑FINEMET-type͒ alloys and Mn ferrites and extended over a much wider temperature range than in these materials.

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“…Such scientific research has dealt with several aspects concerning the intrinsic magnetotransport properties (i.e., frequency range, intensity of the effect, magnetic field to observe possible maximum, noise, etc.) as well as those related with microstructural (mainly amorphous or nanocrystalline) or geometrical character (as it was mentioned, initially in wire, but GMI has been also reported in glass-coated microwire [5,6], ribbon [7], micro-patterned ribbon [8], multilayers [9]) and, therefore, GMI is actually opening a new branch of research combining the micromagnetics of soft magnets with the classical electrodynamics. Recently, the development of high-performance magnetic sensors has benefited from the discovery of this new magnetic phenomenon, giant magnetoimpedance in metal-based amorphous alloys.…”

Section: Introductionmentioning

confidence: 86%

Magnetotransport at High Frequency of Soft Magnetic Amorphous Ribbons

González-Legarreta

Talaat

Ipatov

et al. 2015

Smart Sensors, Measurement and Instrumentation

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Abstract. Magnetic properties of amorphous alloy ribbons have been extensively studied for nearly a quarter of a century since their first production. Much interest in these materials has been stimulated by their remarkable magnetomechanical and magnetotransport properties. It is amazing to notice with respect to the so-called giant magnetoimpedance effect (GMI) effect that the rapid advantages in the understanding of the underlying physical mechanisms of GMI have allowed the development of practical devices and applications using this effect. Therefore, the large influence of magnetic fields and also mechanical stresses in determining the magnetic permeability and electrical impedance of such soft ferromagnetic alloys make these materials very suitable for sensing magnetic field, current and stress. In this chapter we will try to report the recent studies on GMI response of near-zero magnetostriction Co-based amorphous ribbons in as-cast (with different wide dimension) state, and exhibiting a macroscopic uniaxial magnetic anisotropy induced by different stressannealing treatment (300 MPa applied tensile stress at different temperature i.e., 340, 360, and 400 ºC, during 1 h) in the frequency range from 10 MHz up to 1000 MHz. Comparison among GMI effect of as-cast state and stress-annealed ribbons will be discussed. It is remarkable that a more spectacular and defined GMI effect is observed in the stress-annealed ribbons owing to the presence of a macroscopic uniaxial transverse magnetic anisotropy developed with the stressannealing treatment that enhances the transverse component of the magnetic susceptibility.

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Magnetoimpedance effect in amorphous and nanocrystalline ribbons

Cited by 66 publications

References 32 publications

Magnetoimpedance in soft magnetic amorphous and nanostructured wires

Magnetoimpedance in soft magnetic amorphous and nanostructured wires

Soft magnetic properties of high-temperature nanocrystalline alloys: Permeability and magnetoimpedance

Magnetotransport at High Frequency of Soft Magnetic Amorphous Ribbons

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