Bias magnetic effect using compound magnetic wire sensor in AC magnetic field

Abe, Susumu; Ikenaga, T.; Suwa, Kenichiro; Matsushita, A.

doi:10.1109/20.539305

Cited by 2 publications

(2 citation statements)

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“…It was found that because of the magnetic permeability of the wire, magnetic flux around the pickup coil strengthened, and the electromotive force increased to a certain degree. The magnetization of the hard core was also reversed by the applied field above 80 Oe, which resulted in lower output voltage from the wire 6) . The voltage was expected to be saturated or more decreasing even though the magnetic field exceeded 100 Oe.…”

Section: A D V a N C E P U B L I C A T I O Nmentioning

confidence: 99%

“…When the stress was released, two layers appeared: the outer layer, called soft layer, which had a coercive force of 20 Oe, and the inner layer, called the hard core, which had a coercive force of 80 Oe. Details on the magnetic properties of twisted FeCoV wires and torsion stress dependence have been reported by Abe et al 6,7) . This magnetic wire exhibits a uniaxial magnetic anisotropy along its length direction.…”

Section: Fecov Wirementioning

confidence: 99%

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Power Supply for Medical Implants by Wiegand Pulse Generated from Magnetic Wire

et al. 2018

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Implantable medical devices are utilized in the human body for maintaining good health. As these devices are becoming increasingly functionalized, supplying power to them has become very important. Instead of batteries, technologies for wireless power supplies are being developed, such as inductive coupling or piezoelectric elements. However, we propose the use of magnetic wires for this purpose. Inside these wires, a fast magnetization reversal, called a "large Barkhausen jump," occurs due to an applied magnetic field. This reversal induces a large pulse voltage in pick-up coils, which is called a "Wiegand pulse." By applying this pulse as an electric source, a higher electric power is expected compared with the conventional method using a sinusoidal excitation field. A wire core coil was prepared, and open-circuit voltage was measured. In addition, DC voltage and electric power were measured by connecting the wire core coil to a rectifier. The experimental results confirmed the superiority of using a Wiegand pulse at an applied magnetic field intensity of 60 Oe and a frequency of lower than 10 kHz.

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Section: A D V a N C E P U B L I C A T I O Nmentioning

confidence: 99%

Section: Fecov Wirementioning

confidence: 99%

Power Supply for Medical Implants by Wiegand Pulse Generated from Magnetic Wire

et al. 2018

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

1998

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This paper concerns with the magnetic sensor using a vicalloy wire with uniaxial anisotropy and torsion stress. In the magnetic sensor using a compound magnetic wire, the relationship among the wire length, magnetization state and the output voltage based on the large Barkhausen jump was investigated. When the specimen wire was short, magnetizations of soft and hard layers was stable only when they are in anti-parallel due to demagnetizing field. This result indicated that the large output voltage might be obtained when the ratio of length to diameter of the wire was more than 100. Consequently, the pulse voltage V, as high as 2 mV/turn mas obtained in the compound wire even with diameter as fine as of 0.1 mm and length as small as 10 mm.Iiirles Term-compound magnetic layer, demagnetizing field, sensor, torsion stress, vicalloy wire.

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Bias magnetic effect using compound magnetic wire sensor in AC magnetic field

Cited by 2 publications

References 4 publications

Power Supply for Medical Implants by Wiegand Pulse Generated from Magnetic Wire

Power Supply for Medical Implants by Wiegand Pulse Generated from Magnetic Wire

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

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