Magneto-impedance effect in field- and stress-annealed Fe-based nanocrystalline alloys

Yang, Xinliang; Jie, Yang; Chen, G.; Shen, Guotu; Bingyuan, HU; Jiang, Kan

doi:10.1016/s0304-8853(97)00210-2

Cited by 28 publications

(6 citation statements)

References 7 publications

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“…Thus, the FINEMET alloy is an excellent material for the giant magneto-impedance (GMI) effect study as well as for magnetic sensor applications. The GMI effect has been measured on the FINEMENT ribbons [8,[12][13][14] and wires [11,15], in the nanocrystalline state. It was found that the GMI ratio of the nanocrystalline state is much higher than that of the amorphous state.…”

Section: Introductionmentioning

confidence: 99%

Nanocrystallization processes and reorientation of the magnetic moments of FeCuNbSiB films

Wen

Zhao

et al. 2004

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 99%

Nanocrystallization processes and reorientation of the magnetic moments of FeCuNbSiB films

Wen

Zhao

et al. 2004

Journal of Magnetism and Magnetic Materials

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“…The tensile stress would enhance the transverse anisotropy of the material. The effect could be larger in amplitude, as the transverse anisotropy induced by tensile stress is larger in nanocrystalline alloys than in amorphous alloys [26]. Nevertheless, nanocrystalline materials are less adapted than their amorphous counterparts for our sensing application, as they exhibit poor mechanical properties.…”

Section: Resultsmentioning

confidence: 99%

The Impact of Bending Stress on the Performance of Giant Magneto-Impedance (GMI) Magnetic Sensors

Nabias

Asfour

Yonnet

2017

Sensors

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The flexibility of amorphous Giant Magneto-Impedance (GMI) micro wires makes them easy to use in several magnetic field sensing applications, such as electrical current sensing, where they need to be deformed in order to be aligned with the measured field. The present paper deals with the bending impact, as a parameter of influence of the sensor, on the GMI effect in 100 µm Co-rich amorphous wires. Changes in the values of key parameters associated with the GMI effect have been investigated under bending stress. These parameters included the GMI ratio, the intrinsic sensitivity, and the offset at a given bias field. The experimental results have shown that bending the wire resulted in a reduction of GMI ratio and sensitivity. The bending also induced a net change in the offset for the considered bending curvature and the set of used excitation parameters (1 MHz, 1 mA). Furthermore, the field of the maximum impedance, which is generally related to the anisotropy field of the wire, was increased. The reversibility and the repeatability of the bending effect were also evaluated by applying repetitive bending stresses. The observations have actually shown that the behavior of the wire under the bending stress was roughly reversible and repetitive.

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“…That is to say, the FFA was subjected to tensile stress while the RFA to pressure stress. Yang 6 reported that, in the Fe-based nanocrystalline ribbon, a horizontal easy crystallization structure is inducted during the process of tensile stress annealing, proving that the alloy of Fe-based materials are sensitive to tensile stress. Zhang 7 reported their experiment result of annealing under high pressure, and proved that Fe-based materials are sensitive to pressure stress.…”

Section: Resultsmentioning

confidence: 99%

<title>Mesostructure of Fe-based ribbon influenced by inner stress</title>

Fang

Zheng

et al. 2004

SPIE Proceedings

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The mesostructure of Fe-based (Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 ) nanocrystalline ribbon was observed by investigation of the section samples and the molted samples with atomic force microscopy (AFM). The section of the Fe-based crystalline ribbon can be divided into five areas. An apparent mesostructural difference was found in the different areas of the ribbon crystallized after annealing. In RFA, the coarse grains gathering in longitudinal arrangement, while in FFA the fine grains gathering arranged transversely dominates. The size of crystalline grain increases from about 10 nm to about 300 nm with the area gradating from the free surface to the rolled surface. The main reason for such mesostructural difference could be due to the different residual inner stress in the different areas of the amorphous ribbon.

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Magneto-impedance effect in field- and stress-annealed Fe-based nanocrystalline alloys

Cited by 28 publications

References 7 publications

Nanocrystallization processes and reorientation of the magnetic moments of FeCuNbSiB films

Nanocrystallization processes and reorientation of the magnetic moments of FeCuNbSiB films

The Impact of Bending Stress on the Performance of Giant Magneto-Impedance (GMI) Magnetic Sensors

<title>Mesostructure of Fe-based ribbon influenced by inner stress</title>

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