1985
DOI: 10.1063/1.336058
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Magnetoresistive thin-film sensor with permanent magnet biasing film

Abstract: Magnetic characteristics have been investigated for a magnetoresistive thin-film sensor biased using a permanent magnet thin film. Here, Co-Pt thin film is applied to the device as a bias film. Such microlithographed Co-Pt thin films show the same magnetic properties as as-sputtered films. Biasing strength depends on the permanent magnet film thickness, its composition or magnetic properties, and the biasing angle. The output of the sensor is very high.

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Cited by 25 publications
(4 citation statements)
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“…However, permanent magnet fi lms used in microelectronics can only be made from materials which are suitable for use with integrated circuit technology. Permanent magnet fi lms are used to bias magnetically soft active layers of magnetoresistors of magnetoresistive integrated circuits (MIC) on silicon substrates Vyacheslav S. Zayonchkovskiy, e-mail: zajonc4340@gmail.com [1][2][3][4]. Such MICs are used to produce contactless current sensors and read/write heads of disk drives.…”
Section: Introductionmentioning
confidence: 99%
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“…However, permanent magnet fi lms used in microelectronics can only be made from materials which are suitable for use with integrated circuit technology. Permanent magnet fi lms are used to bias magnetically soft active layers of magnetoresistors of magnetoresistive integrated circuits (MIC) on silicon substrates Vyacheslav S. Zayonchkovskiy, e-mail: zajonc4340@gmail.com [1][2][3][4]. Such MICs are used to produce contactless current sensors and read/write heads of disk drives.…”
Section: Introductionmentioning
confidence: 99%
“…The in-plane bias of magnetoresistors is created in order to neutralise the Barkhausen effect. The high-quality magnet fi lms described in [4] were based on precious metals, which increased the cost of such magnets signifi cantly. An alternative to using precious metals is to create magnets using dispersion-hardened alloys (DHA) based on the Fe-Cr-Co system with micron range thickness, also known as the Kaneko alloy [1,5], and the Al-Ni-Co system [6].…”
Section: Introductionmentioning
confidence: 99%
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“…Nevertheless, due to the short length of the interactions, such nanostructures are hard to implement for thick active layers in the 100 nm-1µm range. The use of permanent magnet-induced boundary fi s has also been investigated using SmCo 1 or CoPt 2 and was proven to be efficient for biasing magnetoresistive layers up to 200 nm and several hundred oersteds. In any case, the typical length of the system along the biasing direction did not exceed a few hundred microns.…”
Section: Introductionmentioning
confidence: 99%