Magnetic field and displacement sensor based on linear transformer with amorphous wire core

When a soft ferromagnetic material is flown by an ac current and a magnetic field is applied at the same time, a major change of its impedance is occurred. The aim of this paper is to investigate the influence of low frequency (1KHz-12KHz) ac current and the applied magnetic field on an amorphous magnetic wire (Co68Fe4.35Si12.5B15) without glass coating. For this purpose an experimental configuration has been setup, based on a Wheatstone bridge which receives an ac input signal from a frequency generator. The output is connected to the amorphous wire wrapped with a coil supplied by a dc voltage for the generation of the magnetic field. The output voltage pulse is measured for two cases a) The value of ac frequency is changing while the value of dc voltage applied to the coil remains constant (the magnetic field remains unchanged) and b) the magnetic field is changing while the ac frequency remains constant to a predefined value. Experimental results of the first scenario showed that when the frequency is altered a non-linear increase of the ac signal is observed at the output which shows an increase of the GMI effect and is related to the non-linearity of the wire’s permeability. For the second scenario the results showed an increase of the output signal offset (voltage) which also indicates an increase of the GMI effect.

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Quick-response and sensitive magnetic field sensor using a 200 MHz resonant field effect transistor multivibrator with amorphous wire magnetoinductive elements

Materials Science and Engineering A ◽

10.1016/0921-5093(94)90866-4 ◽

1994 ◽

Vol 181-182 ◽

pp. 1369-1373 ◽

Cited By ~ 1

Author(s):

Y Yoshida ◽

K Mohri ◽

J Yamasaki ◽

T Uchiyama ◽

H Yoshida

Keyword(s):

Magnetic Field ◽

Field Effect ◽

Field Effect Transistor ◽

Magnetic Field Sensor ◽

Amorphous Wire ◽

Quick Response ◽

Resonant Field ◽

Field Sensor ◽

Effect Transistor

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Measurement of Spontaneous Oscillatory Magnetic Field of Guinea-Pig Smooth Muscle Preparation Using Pico-Tesla Resolution Amorphous Wire Magneto-Impedance Sensor

IEEE Transactions on Magnetics ◽

10.1109/tmag.2011.2148165 ◽

2011 ◽

Vol 47 (10) ◽

pp. 3070-3073 ◽

Cited By ~ 85

Author(s):

Tsuyoshi Uchiyama ◽

Kaneo Mohri ◽

Shinsuke Nakayama

Keyword(s):

Magnetic Field ◽

Smooth Muscle ◽

Guinea Pig ◽

Amorphous Wire ◽

Muscle Preparation ◽

Smooth Muscle Preparation ◽

Impedance Sensor

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The frequency spectrum of a voltage measured in an amorphous wire magnetized in alternating magnetic field

Technical Physics Letters ◽

10.1134/1.1666973 ◽

2004 ◽

Vol 30 (2) ◽

pp. 168-171 ◽

Cited By ~ 1

Author(s):

N. A. Buznikov ◽

A. S. Antonov ◽

A. A. Rakhmanov ◽

A. B. Granovsky ◽

M. A. Kartashov ◽

...

Keyword(s):

Magnetic Field ◽

Frequency Spectrum ◽

Alternating Magnetic Field ◽

Amorphous Wire

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Influence of Heating Temperature on the ΔЕ-Effect of Amorphous Fe75Si10B15 Wires

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.215.264 ◽

2014 ◽

Vol 215 ◽

pp. 264-267

Author(s):

Andrey Semenov ◽

Evgeniy Golygin ◽

Alexey Gavriliuk ◽

Alexander Mokhovikov ◽

Alexander Gafarov ◽

...

Keyword(s):

Magnetic Field ◽

Inner Core ◽

Heating Temperature ◽

Amorphous Wire ◽

Absolute Value ◽

Tensile Stresses ◽

Magnetoelastic Coupling ◽

Field Magnitude ◽

Magnetic Field Magnitude ◽

Dc Current

In the present work we have investigated the influence of the thermocycling on the magnetoelastic parameters (the ΔЕ-effect) of amorphous Fe75Si10B15 wires, which had been pretreated by dc current j with simultaneous applying of the tensile stresses σ. It was figured out the ΔЕ-effect behavior depends strongly on pretreatment circumstances. Namely, we have got the maximum absolute value of the ΔЕ-effect shifted into direction of the higher magnetic field magnitude at j<39 MA/m2 and σ<127 MPa. In addition, the negative ΔЕ-effect was not observed for samples, pretreated at j≥45MА/m2 or σ≥128 MPa . The features of such a behavior of the ΔЕ-effect were explained in terms of the magnetoelastic coupling between the inner core and the outer shell of the amorphous wire.

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