Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Magneto-impedance effect of CoFeSiBNi amorphous magnetic films

CoFeSiBNi 아몰퍼스 합금의 자기-임피던스 효과

  • Lee, Seung-Hun (Nano-Science Research Division, Korea Institute of Science and Technology) ;
  • Park, Byung-Kyu (School of electrical engineering, Korea Univ.) ;
  • Hwang, Sung-Woo (School of electrical engineering, Korea Univ.) ;
  • Moon, Sung (Nano-Science Research Division, Korea Institute of Science and Technology)
  • 이승훈 (한국과학기술연구원 나노과학연구본부) ;
  • 박병규 (고려대학교 전기전자전파공학부) ;
  • 황성우 (고려대학교 전기전자전파공학부) ;
  • 문성욱 (한국과학기술연구원 나노과학연구본부)
  • Published : 2007.09.29
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Abstract

Soft ferromagnetic materials are very useful for many sensors using magnetic materials demanding high permeability, low coercivity and low hysteresis loss. Among them, FeCoSiBNi amorphous magnetic films show a good impedance change (about 5.01 %/Oe, at 10 MHz) by the exterinal magnetic field in this experiment. The magnetic films are produced by melt-spun method, one of the rapid solidification process. Ribbon shape wires were made from the films, and let them annealed in DC magnetic field to increase the maximum Giant Magneto Impedance ratio. Field annealing decreases the stress and changes the effective anisotropy. Thus, we can find that the impedance change (200.47 %) is improved and the fabricated magnetic wire has characteristics of good sensor element.

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References

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