The disparate impact of two types of GMI effect definition on DC Joule-heating annealed Co-based microwires

Jiang, Sida; Xing, Dan; Fei, Weidong; Liu, Jingshun; Shen, Hongxian; Fang, Wei; Sun, Jianfei

doi:10.1039/c5ra20048b

Cited by 10 publications

(10 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4(b), inset). Similar results have been observed in Co-rich microwires with different compositions as well [12,16,23]. After the SSA@100mA annealing protocol, the TEM image (Fig.…”

Section: Structural Characterizationsupporting

confidence: 84%

Optimization of the high-frequency magnetoimpedance response in melt-extracted Co-rich microwires through novel multiple-step Joule heating

Thiabgoh

Eggers

Albrecht

et al. 2021

Journal of Science: Advanced Materials and Devices

View full text Add to dashboard Cite

“…4(b), inset). Similar results have been observed in Co-rich microwires with different compositions as well [12,16,23]. After the SSA@100mA annealing protocol, the TEM image (Fig.…”

Section: Structural Characterizationsupporting

confidence: 84%

Optimization of the high-frequency magnetoimpedance response in melt-extracted Co-rich microwires through novel multiple-step Joule heating

Thiabgoh

Eggers

Albrecht

et al. 2021

Journal of Science: Advanced Materials and Devices

View full text Add to dashboard Cite

“…where U ac is the e®ective value of the AC voltage at both ends of the soft magnetic material, I ac is the e®ective value of the AC current°owing through the soft magnetic material, l is the length of the soft magnetic material, q is the crosssectional area, E z ðSÞ is the axial component of the amorphous wire electric¯eld strength, R dc is the DC resistance of the wire, j z ðSÞ represents the surface current density of the soft magnetic material, hj z i q represents the average current density of the cross-sectional area of the soft magnetic material. 18 In addition, the impedance Z of the material can also be represented by the equation of the surface impedance tensor 19…”

Section: The Principle Of the Magnetic Field Measurementmentioning

confidence: 99%

The Design of the Biomagnetic Field Sensor without Magnetic Shielding

Han

Xiao

et al. 2019

Int. J. Human. Robot.

View full text Add to dashboard Cite

Due to the extremely weak intensity of the biomagnetic field and the serious interference from the environmental magnetic field, the detection of the biomagnetic field becomes such challenging work. After analyzing the deficiencies in the current biomagnetic field sensors, this paper proposes and realizes a high-sensitivity magnetic field sensor, based on the giant magneto-impedance (GMI) effect. Taking advantage of the miniaturized magnetic probe, the multistage multiple amplification and the multiband interference suppression, our sensor mainly makes three achievements: the pT level magnetic resolution, the ability to detect the muscle magnetic field without the magnetic shielding and the resistibility to a small-range wobbling in the state of working, which makes it possible to detect the biomagnetic field by wearable sensors under natural conditions.

show abstract

“…With increasing shell thickness and ellipticity of wire cross section, the domain period is found to increase, while the domain period decreases with increasing surface anisotropy. We consider the substitution of transition metal Zr for B to mainly affect the stress induced during fabrication by removal of the amorphous component B and introducing more crystallite nucleation sites with Zr 4 , since all fabrication parameters were held constant for all the microwires. This could have the impact of increasing/decreasing the thickness of the outer shell, inducing irregular surface morphologies, and/or affecting the induced surface anisotropy.…”

Section: Discussionmentioning

confidence: 99%

“…Co-rich melt-extracted amorphous microwires have been recognized as an exciting magnetic material involved in various applications 1 2 3 4 5 , including geomagnetic detection sensors 6 , magnetic induction hyperthermia 7 8 , and detection of magnetically labeled biomolecules 9 . Amorphous microwires possess super soft magnetic properties that exhibit fascinating magnetic phenomena such as the giant magneto-impedance (GMI) effect 10 11 .…”

mentioning

confidence: 99%

Relating surface roughness and magnetic domain structure to giant magneto-impedance of Co-rich melt-extracted microwires

Jiang

Eggers

Thiabgoh

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Understanding the relationship between the surface conditions and giant magneto-impedance (GMI) in Co-rich melt-extracted microwires is key to optimizing their magnetic responses for magnetic sensor applications. The surface magnetic domain structure (SMDS) parameters of ~45 μm diameter Co69.25Fe4.25Si13B13.5-xZrx (x = 0, 1, 2, 3) microwires, including the magnetic domain period (d) and surface roughness (Rq) as extracted from the magnetic force microscopy (MFM) images, have been correlated with GMI in the range 1–1000 MHz. It was found that substitution of B with 1 at. % Zr increased d of the base alloy from 729 to 740 nm while retaining Rq from ~1 nm to ~3 nm. A tremendous impact on the GMI ratio was found, increasing the ratio from ~360% to ~490% at an operating frequency of 40 MHz. Further substitution with Zr decreased the high frequency GMI ratio, which can be understood by the significant increase in surface roughness evident by force microscopy. This study demonstrates the application of the domain period and surface roughness found by force microscopy to the interpretation of the GMI in Co-rich microwires.

show abstract

The disparate impact of two types of GMI effect definition on DC Joule-heating annealed Co-based microwires

Abstract: Based on a study of the effect of progressive DC Joule-heating annealing on GMI properties of melt-extracted amorphous microwires, we systematically analysed the different mechanisms for two types of GMI effect definition.

Cited by 10 publications

References 32 publications

Optimization of the high-frequency magnetoimpedance response in melt-extracted Co-rich microwires through novel multiple-step Joule heating

Optimization of the high-frequency magnetoimpedance response in melt-extracted Co-rich microwires through novel multiple-step Joule heating

The Design of the Biomagnetic Field Sensor without Magnetic Shielding

Relating surface roughness and magnetic domain structure to giant magneto-impedance of Co-rich melt-extracted microwires

Contact Info

Product

Resources

About