• Title/Summary/Keyword: 거대 자기저항

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Characteristics of Mineral Mg Dissolving Sensor in Edible Water using GMR-SV Device (거대자기저항 스핀밸브 소자를 이용한 음용수 미네랄 Mg 용해센서 특성 연구)

  • Lee, Ju-Hee;Kim, Da-Woon;Kim, Min-Ji;Park, Kwang-Seo;Kang, Joon-Ho;Lee, Sang-Suk
    • Journal of the Korean Magnetics Society
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    • v.18 no.5
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    • pp.174-179
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    • 2008

  • The measurement dissolution sensor system using GMR-SV device with magnetic sensitivity of 0.8 %/Oe and Mg-film thick of 200 nm and Mg-foil thick of 50 mm was fabricated and characterized. During the water dissolving process of Mg-film and Mg-foil, the subtle variation of magnetic field by the decrease of current in solenoid was detected by the GMR-SV sensor. The variations of Mg bubble number and ORP as a function of time for three different kinds of edible, tap, and distilled water, are measured and compared. A After 45 min, the speed of fast dissolving Mg was shown the order of edible > tap > DI water. The variation of output magnetoresistance as a function of dissolved time of Mg-film and Mg-foil for edible water, which is composed of mineral content of $0.8{\sim}5.4\;mg/l$ was investigated. The response times for the dissolution in edible water were 5 min and 20 min, respectively. From the measurement of dissolving time and speed for Mg-film and Mg-foil using GMR-SV device, the mineral Mg sensor system in edible water can be possible to develop.

  • https://doi.org/10.4283/JKMS.2008.18.5.174 인용 PDF KSCI

Effects of NiFeCo of NiFe Insertion Layers on the Giant Magnetoresistance Behavior of Ni/Cu Artificial Superlattice (Ni/Cu 인공초격자에서 NiFeCo 및 NiFe 계면 삽입층이 거대자기저항 거동에 미치는 영향)

  • 송용진;주승기
    • Journal of the Korean Magnetics Society
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    • v.5 no.6
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    • pp.963-967
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    • 1995

  • Ultra thin layers of NiFeCo or NiFe were inserted at the interfaces of Ni and Cu to form a multilayer structure. In case of inserting a NiFe layer, the magnetoresistance was about 6%, the saturation magnetic field was 50 Oe and the hysteresis of R-H (resistance-magnetic field) was very small. In case of inserting a NiFeCo layer, the magnetoresistance increased to about 7% but the saturation magnetic field and hysteresis were also increased. The increase of the output under biased magnetic field was much larger in case of inserting a NiFe layer because of relatively smaller hysteresis in R-H behavior.

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A Study on the Characteristics of Giant Magneto Resistance using Multi Layers (다층막을 이용한 거대자기저항(GMR)의 특성 연구)

  • Kim, Byeong-Woo;Lee, Young-Seok
    • Transactions of the Korean Society of Automotive Engineers
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    • v.16 no.5
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    • pp.113-118
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    • 2008

  • We have developed an integrated giant magneto resistance using not only circuit but also integrating technique with semiconductor for automobile application. It has four elements used for giant magneto resistance sensor. Ni-Fe/Cu multi layers were prepared on a glass substrate by magnetron sputtering. The dependence of magneto resistance on the thickness of the Ni-Fe and Cu layers was investigated. The MR ratio showed a saturated a peak at Cu layer $10{\AA}$, Ni-Fe layer $50{\AA}$, where the MR ratio is about 8.7% at room temperature. By means of Ni-Fe multi film and specific integrating technique, these new giant magneto resistance sensor showed excellent resistance characteristics.

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