Contactless Flow Detection with Magnetostrictive Bilayers

Kosel, Jürgen; Pfützner, Helmut; Traxler, Stefan; Giouroudi, Ioanna; Kaniušas, Eugenijus; Mehnen, L.

doi:10.1166/sl.2007.010

Cited by 3 publications

(2 citation statements)

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“…Compared to previous work [11], a compound of induction coil and excitation coil has been included in this study. As an important demand, different numbers of windings are needed here.…”

Section: Discussionmentioning

confidence: 99%

“…This study presents a non-contact BL sensor system for the detection of bidirectional airflow in a tube representing an extended version of a previous paper [11]. The target is to detect dynamic variations of flow without any electric connections through the tube wall, advantages being given with respect to simplicity and non-destructive design.…”

Section: Introductionmentioning

confidence: 99%

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Contactless flow detection with magnetostrictive bilayers

Traxler

Kosel

Pfützner

et al. 2008

Sensors and Actuators A: Physical

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“…Compared to previous work [11], a compound of induction coil and excitation coil has been included in this study. As an important demand, different numbers of windings are needed here.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Contactless flow detection with magnetostrictive bilayers

Traxler

Kosel

Pfützner

et al. 2008

Sensors and Actuators A: Physical

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Out-of-plane anisotropy and low field induced magnetic domain reorientation in Al/Metglas-2605S2/Al trilayer sensors

Passamani¹,

Larica²,

Moscon³

et al. 2011

Journal of Applied Physics

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Local magnetism of Al/Metglas-2605S2/Al trilayer-like sensors prepared by dc sputtering has been studied at room temperature by both in-field and zero-field Mössbauer spectroscopy for a maximum field of 60 mT. Ferromagnetic domain reorientation from out-of-ribbon plane to in-plane, induced by low applied fields, was measured by monitoring the intensities of lines 2 and 5 in the Mössbauer sextet spectra obtained for different magnitudes of applied magnetic field. Coating the Metglas-2605S2 with Al layers of 20 μm thickness, a stress-field is induced, allowing to distinguish different in-plane magnetic anisotropy distributions along the ribbon length (∼4 mT) as well along its width (∼10 mT). Using a phenomenological model for the magnetization reversal, out-of-plane anisotropies ranging up to 3 kJ/m3 were estimated for the Metglas-2605S2 alloy ribbons. This anisotropy range is similar to that observed for the in-plane case previously reported. The methodology applied in this work can be used to determine native out-of-plane anisotropy distributions for different melt-spun ribbons. It also allows understanding magnetization reversal associated with the ferromagnetic domains reorientation caused either by induced stress or by applied magnetic field.

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Controlled Trapping and Detection of Magnetic Particles by a Magnetic Microactuator and a Giant Magnetoresistance (GMR) Sensor

Giouroudi

Gooneratne

2014

KEM

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This paper presents the design and testing of an integrated micro-chip for the controlled trapping and detection of magnetic particles (MPs). A unique magnetic micro-actuator consisting of square-shaped conductors is used to manipulate the MPs towards a giant magnetoresistance (GMR) sensing element which rapidly detects the majority of MPs trapped around the square-shaped conductors. The ability to precisely transport a small number of MPs in a controlled manner over long distances by magnetic forces enables the rapid concentration of a majority of MPs to the sensing zone for detection. This is especially important in low concentration samples. The conductors are designed in such a manner so as to increase the capture efficiency as well as the precision and speed of transportation. By switching current to different conductors, MPs can be manipulated and immobilized on the innermost conductor where the GMR sensor is located. This technique rapidly guides the MPs towards the sensing zone. Secondly, for optimum measurement capability with high spatial resolution the GMR sensor is fabricated directly underneath and all along the innermost conductor to detect the stray fields originating from the MPs. Finally, a microfluidic channel is fabricated on top of this micro-chip. Experiments inside the microchannel were carried out and the MPs were successfully trapped at the sensing area.

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Contactless Flow Detection with Magnetostrictive Bilayers

Cited by 3 publications

References 0 publications

Contactless flow detection with magnetostrictive bilayers

Contactless flow detection with magnetostrictive bilayers

Out-of-plane anisotropy and low field induced magnetic domain reorientation in Al/Metglas-2605S2/Al trilayer sensors

Controlled Trapping and Detection of Magnetic Particles by a Magnetic Microactuator and a Giant Magnetoresistance (GMR) Sensor

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