• Proceedings of the Korean Magnestics Society Conference
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• 1997.11a
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• pp.72-73
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• 1997

• Proceedings of the Korean Magnestics Society Conference
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• 2004.06a
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• pp.200-200
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• 2004

• Proceedings of the Korean Magnestics Society Conference
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• 2013.12a
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• pp.79-80
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• 2013

• Journal of the Korean Magnetics Society
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• v.19 no.6
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• pp.191-196
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• 2009

Magnetic bias phenomena of field-annealed CoFeSiB amorphous ribbons showing asymmetric giant magnetoimpedance was investigated by MOKE method. The specimens removed the crystalline layer at one surface side by chemical etching were prepared and measured magnetization curves by MOKE to investigate the effect of the crystalline layer on magnetization of inner soft amorphous phase. We observed the shift of hysteresis loop, and concluded that the crystalline layer exerts bias field effect on inner soft amorphous phase and the direction of bias filed is opposite to the magnetization direction of surface crystalline layer.

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.11a
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• pp.137-137
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• 1998

• Journal of the Korean Magnetics Society
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• v.19 no.4
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• pp.138-141
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• 2009

We studied the effects of Saccharin on the properties of electroplated Ni-Fe Permalloy thin films. When 0 to 1 ${\mu}mol/L$ of Saccharin was added to the plating electrolyte, the grain sizes of the deposits are found to decrease, which reduces the surface roughness and the coercivity and increases the permeability and magnetoimpedance. The reduction in the grain sizes is strongly correlated with increases in the incremental permeability and the magnetoimpedance. We demonstrated that Saccharine is a useful additive for the electrodeposition of soft Permalloy thin films and that the softness can be adjusted by varying the concentration of Saccharin.

• Journal of the Korean Magnetics Society
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• v.23 no.6
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• pp.205-208
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• 2013

The width dependence of Delta E has been studied by impedance resonance method in Fe-rich amorphous ribbon of as received state. It can be explained by single domain model include effective magnetic field $H_{eff}$ and demagnetization factor $N_d$. Wider width ribbon's effective is smaller than narrow it. Young's modulus also smaller than narrow width. These result well agreement in calculation. It has been also studied that linear magnetic field sensor using width dependence of Delta E under the field range 0 Oe~80 Oe. The sensitivity of the sensor was found to be 95 Hz/Oe.

• 한국초전도학회:학술대회논문집
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• v.10
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• pp.311-314
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• 2000

자기차폐형 고온초전도한류기에서 철심의 포화 문제와 더불어 가장 문제가 되는 것은 공극의 크기이다. 고온초전도 tube 와 철심 또는 일차 권선과 초전도 tube 사이에서의 공극은 정상상태에서 불필요한 전압강하의 원인이 된다. 이러한 전압강하는 시스템에서의 불안정성을 초래할 수 있기 때문에, 공극의 결정은 고온초전도한류기의 설계에 있어 가장 중요한 요소가 된다. 또한, 사고 발생시 나타나는 고온초전도한류기의 임피던스는 사고 전류를 제한하는 주요한 요소이다. 다양한 parameter의 변화를 통하여 고온초전도한류기의 임피던스변화를 관찰하였고, 임피던스 변화에 따른 전류제한 효과를 시뮬레이션을 통해 확인하였다. 시뮬레이션의 결과를 이용하여 440v급 Rod type 고은초전도한류기를 설계하였으며, 동작 특성을 해석하였다.

• Proceedings of the Korean Magnestics Society Conference
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• 2004.12a
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• pp.80-80
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• 2004

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1999.11a
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• pp.73-76
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• 1999

In this thesis, we fabricate a zero-magnetostrictive amorphous ribbon measure the impeadance effect, and then Investigate possibility as a sensor material. $Co_{72.5}$F $e_{0.5}$M $o_{2}$ $B_{15}$ S $i_{5}$ is used as composition of specimen alloy. We first melt the specimen in high frequency induction furnace and then rapidly quench it by using single roll technique. As the result, we obtain a ribbon where thickness is 12${\mu}{\textrm}{m}$, width is 1mm and length is 93mm. Consequently, it is proved through this study that zero-magnetostrictive amorphous ribbon can be used as an excellent magnetic sensor material.rial.l.