Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Velocity Change of Magneto Surface Acoustic Wave (MSAW) in (Fe1-xCox)89Zr11 Amorphous Films (II)

(Fe1-xCox)89Zr11 비정질 자성막에서의 자기표면탄성파 속도변화(II)

  • Kim, Sang-Won (Electromagnetic Materials laboratory, Materials & Proesses Research Center, Research Institute of Industrial Science and Technology)
  • 김상원 (포항산업과학연구원 재료공정연구센터 금속·코팅재료연구팀)
  • Published : 2002.04.01
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Abstract

The effect of field annealing on the velocity changes of magneto surface acoustic wave (MSAW) devices has been investigated for deposited $(Fe_{1-x}Co_x)_{89}Zr_{11}$ (x = 0~1.0) amorphous films. By means of two step field annealing at $195^{\circ}C$ for 10 minute in the magnetic field of 130 Oe, the MSAW device with x=0.4 film among the devices showed the superior velocity change of 0.1 %. This gigantic value was obtained in the DC bias field of 40 Oe at the exciting frequency of 8.7 MHz. It was confirmed that such behavior was due to the variation of differential permeability caused by an optimal stress within the magnetic film.

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References

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