Amorphous wire MI micro sensor using C-MOS IC multivibrator

Kanno, T.; Mohri, K.; Yagi, Takanori; Uchiyama, Tsuyoshi; Shen, Liang

doi:10.1109/20.617943

Cited by 87 publications

(26 citation statements)

References 5 publications

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“…A considerable interest has been focused on the giant magneto-impedance, GMI, effect in the amorphous soft ferromagnetic materials because of their important applications in highly sensitive micromagnetic sensors [1][2][3]. The GMI effect can be defined as the change of the impedance of a soft magnetic element carrying a high frequency current as a function of the external dc magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Torsional stress impedance effect in Fe ₇₁ Cr ₇ Si ₉ B ₁₃ amorphous wire

Atalay

Bayri

Bahadır

et al. 2004

phys. stat. sol. (c)

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PACS 75.50.KjThe magnetoimpedance effect has been measured in as-received and current annealed Fe 71 Cr 7 Si 9 B 13 amorphous wires under torsional stress varied up to 1.2 rad/cm. It was found that the torsional stress dependence of impedance of as-received amorphous wire has a non-monotonous shape with first an increase of the impedance and then a decrease. On the other hand, the impedance of current annealed wire directly starts to decrease with increasing torsional stress. The current annealing of wire results in a large variation in the magnitude of torsional stress impedance effect, (∆Z/Z) ξ (%), up to 150%. Also, a simple mathematical model based on the magnetic moment rotation to explain torsional stress versus impedance data was developed and the results were partly discussed on the basis of this model.

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Section: Introductionmentioning

confidence: 99%

Torsional stress impedance effect in Fe ₇₁ Cr ₇ Si ₉ B ₁₃ amorphous wire

Atalay

Bayri

Bahadır

et al. 2004

phys. stat. sol. (c)

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“…Such domain configuration is typical for the nearly-zero magnetostrictive amorphous wires mainly produced by Japanise company Unitika LTD [1][2][3]. On the other hand, these amorphous wires with vanishing magnetostriction constant present best magnetic softness [4].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, these amorphous wires with vanishing magnetostriction constant present best magnetic softness [4]. It has been clearly demonstrated by T. Yoshinaga et al [8] 3 , that the removing of the external layer with high transverse permeability results in simultaneous degradation of its magnetic softness, decrease of MI effect ( / ) and increase of the squareness ratio and coercivity. Besides, it was recently demonstrated that the applied stresses can significantly affect the GMI effect of conventional amorphous wires and glass coated microwires [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, a CMOC IC (Complimentary Metal Oxide Silicon Integtrated ciruits) with pulsed current operation was established for the MI sensors [3]. The stress-impedance (SI) and torsion impedance (TI) effects, showing a high sensitivity of the impedance to the applied stress with a strange gauge factor of 2000-4000, have been found in amorphous wires [4].…”

Section: Introductionmentioning

confidence: 99%

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Development of Ultra-Thin Glass-Coated Amorphous Microwires for High Frequency Magnetic Sensors Applications

Zhukova¹,

Ipatov²,

Garcia³

et al. 2007

TOMSJ

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Abstract:The giant magneto-impedance (GMI) effect has been studied in 3 different families of amorphous wires: conventional amorphous wires (125 μm in diameter), cold drawn wires (50 and 20 μm in diameter) and thin glass coated amorphous microwires (with metallic nucleus diameter of about 15 μm). These wires have been investigated in the frequency range 1 -500 MHz. A remarkable difference in the magnetic field dependence of the GMI effect can be attributed to the different magnetoelastic anisotropy of these three families of the wires.

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“…Negative feedback is employed for removing the noise and temperature dependence; two more coils are used for this purpose. A stable GMI sensor with field detection resolution of 10 −6 Oe was made [7]. H. Hauser et al also constructed a magnetic field sensor using GMI in CoSiBNd wire with 70 µm length and 30 µm diameter.…”

Section: Introductionmentioning

confidence: 99%

Prototype Milli Gauss Meter Using Giant Magnetoimpedance Effect in Self Biased Amorphous Ribbon

Kollu¹,

Yoon²,

Kim³

et al. 2010

Journal of Magnetics

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In our present work, we developed a GMI (giant magnetoimpedance) sensor system to detect magnetic fields in the milli gauss range based on the asymmetric magnetoimpedance (AGMI) effect in Co-based amorphous ribbon with self bias field produced by field-annealing in open air. The system comprises magnetoimpedance sensor probe, signal conditioning circuits, A/D converter, USB controller, notebook computer, and program for measurement and display. Sensor probe was constructed by wire-bonding the cobalt based amorphous ribbon with dimensions 10 mm × 1 mm × 20 µm on a printed circuit board. Negative feedback was used to remove the hysteresis and temperature dependence and to increase the linearity of the system. Sensitivity of the milli gauss meter was 0.3 V/Oe and the magnetic field resolution and environmental noise level were less than 0.01 Oe and 2 mOe, respectively, in an unshielded room.

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Amorphous wire MI micro sensor using C-MOS IC multivibrator

Cited by 87 publications

References 5 publications

Torsional stress impedance effect in Fe ₇₁ Cr ₇ Si ₉ B ₁₃ amorphous wire

Torsional stress impedance effect in Fe ₇₁ Cr ₇ Si ₉ B ₁₃ amorphous wire

Development of Ultra-Thin Glass-Coated Amorphous Microwires for High Frequency Magnetic Sensors Applications

Prototype Milli Gauss Meter Using Giant Magnetoimpedance Effect in Self Biased Amorphous Ribbon

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Amorphous wire MI micro sensor using C-MOS IC multivibrator

Cited by 87 publications

References 5 publications

Torsional stress impedance effect in Fe 71 Cr 7 Si 9 B 13 amorphous wire

Torsional stress impedance effect in Fe 71 Cr 7 Si 9 B 13 amorphous wire

Development of Ultra-Thin Glass-Coated Amorphous Microwires for High Frequency Magnetic Sensors Applications

Prototype Milli Gauss Meter Using Giant Magnetoimpedance Effect in Self Biased Amorphous Ribbon

Contact Info

Product

Resources

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Torsional stress impedance effect in Fe ₇₁ Cr ₇ Si ₉ B ₁₃ amorphous wire

Torsional stress impedance effect in Fe ₇₁ Cr ₇ Si ₉ B ₁₃ amorphous wire