발간논문

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Vol.28, No.11, 957 ~ 964, 1990
Title
Magnetic Properties of Amorphous Co - Y Thin Film alloys
한석희S . H . Han, 김광윤K . Y . Kim, 김희중H . J . Kim, 이정중J . J . Lee, 강일구I . K . Kang
Abstract
The magnetic properties of amorphous Co-Y thin films prepared by RF magnetron sputtering have been investigated. The saturation magnetization of Co-Y alloy is linearly decreased with increasing Y content, and the magnetic moments of Co-Y alloys larger than those of Friedel`s theory were interpreted by the atomic size effect. The coercive force is drastically decreased at about 8 at.% Y which is the minimum solute concentration to get the amorphous phase. The solute concentration of film is monotonously increased with increasing Ar pressure, and the coercive force shows the lowest values at the Ar pressure of 5 mTorr. Effective permeability in hard direction of thin film produced in magnetic field is lower at low Frequencies but higher at high frequencies above 100 ㎑ than those of easy direction. The rotating magnetic field annealing is effective to increase the effective permeability at overall frequency range.
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