A new Barkhausen noise technique for applications at miniaturized geometries

The magnetic Barkhausen Noise technique is a well suited method for the characterization of ferromagnetic materials. Most sensors are composed of a magnetic yoke that excites the electromagnetic field in the material, and a coil or Hall-Element, which is located between both feet of the yoke to reco...

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Main Authors:	Hillmann, Susanne, Meyendorf Norbert
Format:	Conference Proceeding
Language:	eng
Subjects:	Barkhausen effect Boreholes Electromagnetic fields Ferromagnetic materials Magnetic fields Magnetism Noise Noise generation Sensors
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title	A new Barkhausen noise technique for applications at miniaturized geometries
format	Conference Proceeding
creator	Hillmann, Susanne Meyendorf Norbert
subjects	Barkhausen effect Boreholes Electromagnetic fields Ferromagnetic materials Magnetic fields Magnetism Noise Noise generation Sensors
ispartof	AIP Conference Proceedings, 2014, Vol.1581 (1), p.1298
description	The magnetic Barkhausen Noise technique is a well suited method for the characterization of ferromagnetic materials. Most sensors are composed of a magnetic yoke that excites the electromagnetic field in the material, and a coil or Hall-Element, which is located between both feet of the yoke to record the Barkhausen Noise. Due to both factors, the overall size of the sensors and the spot size at the material are relatively large. For some applications, Barkhausen Noise Sensors for miniaturized samples with complex geometries are needed, for example for small mass-production components or measurements inside of boreholes. Therefore, a new design for a Barkhausen Noise sensor was developed. The principle of exciting the Magnetic Field changes from a magnetic yoke to a thin tip. The alternating current flows through the tip into the material and induces a magnetic field, which in turn generates the Barkhausen Noise. A small coil wounded around the tip, records the Barkhausen Noise signal. With this design, the contact point between sensor and material is very small and it is possible to apply the sensor to very small samples or inside boreholes.
language	eng
source	American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list)
identifier	ISSN: 0094-243X
fulltext	fulltext
issn	0094-243X 1551-7616
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Most sensors are composed of a magnetic yoke that excites the electromagnetic field in the material, and a coil or Hall-Element, which is located between both feet of the yoke to record the Barkhausen Noise. Due to both factors, the overall size of the sensors and the spot size at the material are relatively large. For some applications, Barkhausen Noise Sensors for miniaturized samples with complex geometries are needed, for example for small mass-production components or measurements inside of boreholes. Therefore, a new design for a Barkhausen Noise sensor was developed. The principle of exciting the Magnetic Field changes from a magnetic yoke to a thin tip. The alternating current flows through the tip into the material and induces a magnetic field, which in turn generates the Barkhausen Noise. A small coil wounded around the tip, records the Barkhausen Noise signal. 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