Role of artificially created defects on magnetoimpedance of Co73Fe4.5Mn0.5Nb1.0Si4.2B16.8 ribbon

Manna, Subhendu Kumar; Srinivas, V.

doi:10.1016/j.jmmm.2016.02.056

Cited by 3 publications

(6 citation statements)

References 32 publications

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“…The surface roughness of the sample is important when the skin effect is strong. Microstructure and magnetic and MI properties of Co 73 Fe 4.5 Mn 0.5 Nb 1.0 Si 4.2 B 16.8 ribbon with and without artificial defects were studied in [6]. In this work the GMI value has been decreased with increasing the density of holes and the anisotropy induced by artificial defects strongly affected GMI properties.…”

Section: Introductionmentioning

confidence: 84%

“…On the other hand, one can expect the improvement of the magnetic flux closing for the rough surface with magnetic ferrofluid spread on it. It was shown recently that naturally formed or artificially designed surface defects can be used for the control of the GMI sensitivity [6]. Mechanical processing of the surface modification of the amorphous materials is practically impossible due to their physical properties.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies showed that the GMI responses in appropriate conditions can be clearly dependent on the presence of the magnetic ferrofluid and the parameters of the driving current [3,6]. The shape or particular geometry of the sensitive element strongly influences the GMI behavior.…”

Section: Introductionmentioning

confidence: 99%

“…The shape or particular geometry of the sensitive element strongly influences the GMI behavior. The surface roughness and irregularities in the surface composition or stresses and associated with them variations in local magnetic anisotropy can play an important role contributing to the effective magnetic anisotropy peculiarities and GMI behavior [6,7]. Another attractive research branch of surface modification of amorphous ribbons has been developed recently counting ion irradiation, chemical polishing, and diamagnetic or magnetic material coating [8].…”

Section: Introductionmentioning

confidence: 99%

“…In this work the GMI value has been decreased with increasing the density of holes and the anisotropy induced by artificial defects strongly affected GMI properties. Enhancement of GMI in polished samples is attributed to smoother surface of the ribbons which reduces the effective anisotropy [6]. Treating the surface of a ribbon with an appropriate concentration of acid has been shown to be a useful way to improve the sensitivity of detection of a ribbon-based GMI biosensor, which is probably related to effect of the microholes-pattern produced by the acid on the surface of ribbon [5,10].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Magnetoimpedance Effect in CoFeMoSiB As-Quenched and Surface Modified Amorphous Ribbons in the Presence of Igon Oxide Nanoparticles of Water-Based Ferrofluid

et al. 2017

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Giant magnetoimpedance (GMI) has been proposed as a powerful technique for biosensing. In GMI biosensors based on the magnetic label detection the change of the impedance of sensitive element under the application of an external magnetic field was analyzed in the presence of magnetic nanoparticles in a test solution. Amorphous ribbon-based GMI biodetectors have an advantage of low operation frequency and low cost. In this work, magnetic and GMI properties of amorphous Co 68.6 Fe 3.9 Mo 3.0 Si 12.0 B 12.5 ribbons were studied in as-quenched and surface modified states both without and in the presence of maghemite ferrofluid. After the surface modification the coercivity was slightly increased and saturation magnetization decreased in good agreement with increase of the surface roughness, a decrease of magnetic elements concentrations in the surface layer, and formation of a surface protective oxide layer. The GMI difference for as-quenched ribbons in absence and in the presence of ferrofluid was measurable for the frequency range of 2 to 10 MHz and the current intensities of 1 to 20 mA. Although the proposed surface modification by the ultrasound treatment did not improve the sensitivity limit for ferrofluid detection, it did not decrease it either.

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Section: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Magnetoimpedance Effect in CoFeMoSiB As-Quenched and Surface Modified Amorphous Ribbons in the Presence of Igon Oxide Nanoparticles of Water-Based Ferrofluid

et al. 2017

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Magnetic properties and giant magnetoimpedance effect for CoFeMoSiB surface modified amorphous ribbons covered by water based ferrofluid

et al. 2018

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Giant magnetoimpedance (GMI) effect is a powerful technique for magnetic label detection. Co-based amorphous ribbons are cheap materials showing high GMI effect at low operation frequencies for close to zero magnitostriction compositions. In this work magnetic properties and GMI were studied for CoFeMoSiB amorphous ribbons in as-quenched and surface modified states without and in the presence of water-based ferrofluid with electrostatic stabilization of γ-Fe2O3 nanoparticles. Surface modification by ultrasound treatment resulted in appearance of round defects with average diameter of about 150 micrometers. The GMI difference for as-quenched ribbons in absence and in the presence of ferrofluid was measured for the frequency range of 0.5 to 10 MHz. Although proposed surface modification by the ultrasound treatment did not improve the sensitivity limit for ferrofluid detection, it did not decrease it either. Observed changes of GMI are useful for understanding of functionality of GMI biosensors.

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Magnetoimpedance and Stress-Impedance Effects in Amorphous CoFeSiB Ribbons at Elevated Temperatures

et al. 2020

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The temperature dependencies of magnetoimpedance (MI) and stress impedance (SI) were analyzed both in the as-quenched soft magnetic Co68.5Fe4Si15B12.5 ribbons and after their heat treatment at 425 K for 8 h. It was found that MI shows weak changes under the influence of mechanical stresses in the temperature range of 295–325 K and SI does not exceed 10%. At higher temperatures, the MI changes significantly under the influence of mechanical stresses, and SI variations reach 30%. Changes in the magnetoelastic properties for the different temperatures were taken into consideration for the discussion of the observed MI and SI responses. The solutions for the problem of thermal stability of the magnetic sensors working on the principles of MI or SI were discussed taking into account the joint contributions of the temperature and the applied mechanical stresses.

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Role of artificially created defects on magnetoimpedance of Co73Fe4.5Mn0.5Nb1.0Si4.2B16.8 ribbon

Cited by 3 publications

References 32 publications

Magnetoimpedance Effect in CoFeMoSiB As-Quenched and Surface Modified Amorphous Ribbons in the Presence of Igon Oxide Nanoparticles of Water-Based Ferrofluid

Magnetoimpedance Effect in CoFeMoSiB As-Quenched and Surface Modified Amorphous Ribbons in the Presence of Igon Oxide Nanoparticles of Water-Based Ferrofluid

Magnetic properties and giant magnetoimpedance effect for CoFeMoSiB surface modified amorphous ribbons covered by water based ferrofluid

Magnetoimpedance and Stress-Impedance Effects in Amorphous CoFeSiB Ribbons at Elevated Temperatures

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