Supergiant magnetoimpedance effect in a glass-coated microwire <i>LC</i> resonator

Kim, Yong-Seok; Yu, Seong‐Cho; Le, Anh‐Tuan; Kim, Chong-Oh; Rhee, J.R.; Vázquez, M.; Hwang, Myung-Joo; Lee, Heebok

doi:10.1063/1.2165598

Cited by 9 publications

(7 citation statements)

References 6 publications

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“…This also differs from what was observed in GMI curves relating to the ferromagnetic resonance in the high-frequency range 1-10 GHz for Co-based microwires [11,12]. In the present work, the appearance of a GMI multiple-peak feature can be determined not only by the LC-resonance circuit [5], but is also related to the formation of standing magnetic waves within the sample [4]. If this is the case [4], any change in microwire dimension can cause a change in the number of GMI peaks.…”

Section: Resultscontrasting

confidence: 88%

“…Both methods have proved useful for developing ultrasensitive magnetic sensors, which meet specific engineering requirements. In our recent work [5], we discovered a super-giant magnetoimpedance (SGMI) effect in a glasscoated microwire LC-resonator in which the LC-resonator was directly constructed on a glass-coated magnetic microwire by forming two capacitive terminal electrodes at the ends of the microwire without direct contact to its ferromagnetic core. The sudden changes in magnetoimpedance around the resonance frequency were observed, and the SGMI effect reached an extremely high value, 400 000%, by precisely tuning frequency around the resonance frequency.…”

Section: Introductionmentioning

confidence: 99%

“…This discovery has led to the development of high-performance magnetic sensors which can operate in the high-frequency region. However, understanding the complex nature of SGMI phenomena in such a glass-coated microwire LC-resonator was not completed [5,6] and this thus warrants further study.…”

Section: Introductionmentioning

confidence: 99%

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Influences of annealing and wire geometry on the giant magnetoimpedance effect in a glass-coated microwire LC-resonator

Le¹,

Phan²,

Kim³

et al. 2007

J. Phys. D: Appl. Phys.

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The influence of annealing and of wire geometry on the giant magnetoimpedance (GMI) effect in a glass-coated microwire LC-resonator were systematically investigated. It was found that annealing magnetic microwires significantly varied the permeability and hence the GMI ratio, whereas the magnetoimpedance response was sensitively altered with varying wire geometry of the LC-resonator. The magnitude of GMI is determined by the soft magnetic characteristics of the microwire and the effect of LC-resonance, while the multiple-peak GMI feature can be attributed to the LC-resonance circuit and the formation of standing magnetic waves within the sample. Interestingly, the GMI ratio reached the largest values of 400 000% and 270 000% at the resonance frequencies of 518.51 MHz and 146.32 MHz for Co83.2B3.3Si5.9Mn7.6 and Co67Fe3.8Ni1.4B11.5Si14.6Mo1.7 samples, respectively. The corresponding magnetic-field sensitivities of GMI are about 218 000%/Oe and 135 000%/Oe. These results are interesting for the development of a new family of ultra-sensitive and high-frequency magnetic sensors. The feature of a LC-resonance circuit can be used for improving the sensitivity of GMI-based magnetic sensors while selecting the working frequency.

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Section: Resultscontrasting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

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Influences of annealing and wire geometry on the giant magnetoimpedance effect in a glass-coated microwire LC-resonator

Le¹,

Phan²,

Kim³

et al. 2007

J. Phys. D: Appl. Phys.

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“…Usually when talking about improving the GMI effect, we mainly focus on the optimization of sandwich film, including the material properties and geometrical parameter such as thickness and width. Recently there are reports that the introduction of the capacitance could also increase the GMI effect [10].…”

Section: Article In Pressmentioning

confidence: 99%

The investigation of giant magnetoimpedance effect in meander NiFe/Cu/NiFe film

Zhang

Zhou

Cao

2008

Journal of Magnetism and Magnetic Materials

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“…Both methods have proved useful for developing ultrasensitive magnetic sensors that can operate at very high frequencies [71][72][73][74][75][76][77][78][79][80]. In particular, Kim et al [81] have recently demonstrated the superior features of LC filter-type magnetoimpedance sensors.…”

Section: Introductionmentioning

confidence: 97%

Advanced Magnetic Microwires as Sensing Elements for LC-Resonant-Type Magnetoimpedance Sensors: A Comprehensive Review

Phan

2011

J Supercond Nov Magn

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In recent years, all modern vehicles and transport means use a vast variety of sensors and transducers. The operation of all medical instruments is also based on sensors and transducers. Industry is also employing more and more transducers for the monitoring and control of production lines. Therefore, the sensing technology has been driven by the increasing needs for enhanced sensitivity, improved stability, high reliability, and lower costs. For this purpose, we have proposed and developed novel two LC resonant-type magnetoimpedance (LCMI) sensor devices utilizing soft magnetic microwires as a sensing element, giving an emphasis on the use of resonance effect from LCcomponents and the rapid permeability change of the magnetic microwires to significantly improve the sensitivity performance of sensors. This article aims to provide a comprehensive analysis of the design and operation of these devices. After a description of magnetic core materials, circuit designs and fabrication techniques is given, the details of all experimental measurements are presented. The characterizations of constructed LCMI sensor devices are systematically analyzed, and the physical origins of magneto-resonant phenomena, field, and frequency dependences in these LCMI sensor devices are addressed. Influences of processing parameters on the sensing characteristics of LCMI sensors are also discussed. This enables the optimal conditions to fabricate high-performance magnetic sensing devices.

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Supergiant magnetoimpedance effect in a glass-coated microwire LC resonator

Cited by 9 publications

References 6 publications

Influences of annealing and wire geometry on the giant magnetoimpedance effect in a glass-coated microwire LC-resonator

Influences of annealing and wire geometry on the giant magnetoimpedance effect in a glass-coated microwire LC-resonator

The investigation of giant magnetoimpedance effect in meander NiFe/Cu/NiFe film

Advanced Magnetic Microwires as Sensing Elements for LC-Resonant-Type Magnetoimpedance Sensors: A Comprehensive Review

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