Dependence of large Barkhausen jump on length of a vicalloy fine wire with torsion stress

Abe, Susumu; Matsushita, A.; Naoe, M.

doi:10.1109/20.706534

Cited by 13 publications

(3 citation statements)

References 2 publications

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“…Due to the magnetic anisotropy, the wire is preferably magnetized in one of the two directions along the wire axis (Abe et al, 1997). No matter how slow the external magnetic field changes, the transition between these two bi-stable states, often referred to as the macroscopic Barkhausen effect, takes place almost instantaneously (Abe et al, 1998;Huening and Backes, 2020). It is associated with a release of magnetic energy that can be picked up as induction voltage in a surrounding coil.…”

Section: Wiegand Effectmentioning

confidence: 99%

Energy analysis of a wireless sensor node powered by a Wiegand sensor

Wiegner

Völker

Mainz

et al. 2023

J. Sens. Sens. Syst.

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Abstract. This article describes an Internet of things (IoT) sensing device with a wireless interface which is powered by the energy-harvesting method of the Wiegand effect. The Wiegand effect, in contrast to continuous sources like photovoltaic or thermal harvesters, provides small amounts of energy discontinuously in pulsed mode. To enable an energy-self-sufficient operation of the sensing device with this pulsed energy source, the output energy of the Wiegand generator is maximized. This energy is used to power up the system and to acquire and process data like position, temperature or other resistively measurable quantities as well as transmit these data via an ultra-low-power ultra-wideband (UWB) data transmitter. A proof-of-concept system was built to prove the feasibility of the approach. The energy consumption of the system during start-up was analysed, traced back in detail to the individual components, compared to the generated energy and processed to identify further optimization options. Based on the proof of concept, an application prototype was developed.

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Section: Wiegand Effectmentioning

confidence: 99%

Energy analysis of a wireless sensor node powered by a Wiegand sensor

Wiegner

Völker

Mainz

et al. 2023

J. Sens. Sens. Syst.

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“…The Wiegand effect was initially observed in NiFe alloy wire by John R. Wiegand in 1974 [1,2]. It was reported that the wire made of FeCoV alloy offered optimum performance in generating the Wiegand effect [3][4][5][6][7][8][9]. The diameter of the Wiegand wire used in the prior research was about 0.25 mm.…”

Section: Wiegand Effectmentioning

confidence: 99%

Magnetic Reference Mark in a Linear Positioning System Generated by a Single Wiegand Pulse

Lien

Chang

2022

Sensors

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A Wiegand sensor is composed of a strip of Wiegand wire and a pick-up coil. The research presented in this paper examines and characterizes the fast magnetization reversal in a Wiegand wire, which leads to changes in magnetic flux density in its pick-up coil to produce the so-called Wiegand pulse to be used as a reference mark in a linear positioning system. It was observed in this research that the magnitude and duration of the pulse voltage were independent of driving frequency, indicating that Wiegand effect sensors could be ideal for use as zero-speed transducers. The repeatability of the Wiegand pulse was found to vary with different magnetic flux intensities of external magnetic field, as well as the angle between the magnetic induction line and the Wiegand wire. Through calibrated experimental and numerical parametric studies, the mechanism for producing repeatable Wiegand pulses to be used as a reference mark for precision liner positioning systems was revealed, which represents the novelty of this research. On the basis of this mechanism, the optimal design combination of the Wiegand sensor’s position with respect to the magnetization source can be obtained. Utilizing commercially available Wiegand sensors, it was demonstrated in this research that with a Wiegand pulse serving as a magnetic reference mark, positioning repeatability of 0.3 um could be achieved, which is on the same order as optical scales. The work presented in this research has engineering implications as well as offering scientific insights into magnetization mechanisms for generating enough magnetic remanence to produce a Barkhausen jump, resulting in repeatable Wiegand for use as a reference mark in a linear positioning system.

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“…A bistable magnetic structure is formed in FeCoV wires by twisting and annealing treatments. The magnetic properties of FeCoV wires have been reported in terms of annealing and torsion stress [19,20]. After the wires are twisted, their outer layers near the surface become magnetically soft with a low coercivity, whereas the center core remains magnetically hard with a high coercivity [20].…”

Section: Introductionmentioning

confidence: 99%

Surface Magnetization Reversal of Wiegand Wire Measured by the Magneto-Optical Kerr Effect

et al. 2021

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The Wiegand wire is known to exhibit a unique feature of fast magnetization reversal in the magnetically soft region accompanied by a large Barkhausen jump. We clarified a significant difference between the magnetization reversals at the surface and at the entire cross section of a Wiegand wire. We conducted magnetization measurements based on the magneto-optical Kerr effect and applied conventional methods to determine the magnetization curves. The switching field of the magnetization reversal at the surface was greater than that at the initiation of a large Barkhausen jump. Our analysis suggests that the outer surface layer exhibits low coercivity.

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Dependence of large Barkhausen jump on length of a vicalloy fine wire with torsion stress

Cited by 13 publications

References 2 publications

Energy analysis of a wireless sensor node powered by a Wiegand sensor

Energy analysis of a wireless sensor node powered by a Wiegand sensor

Magnetic Reference Mark in a Linear Positioning System Generated by a Single Wiegand Pulse

Surface Magnetization Reversal of Wiegand Wire Measured by the Magneto-Optical Kerr Effect

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