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Vol.36, No.2, 264 ~ 271, 1998
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| Title |
| Microstructure and Giant Magnetoresistance Effect of Co-Cu Alloy Ribbons |
| 김익준 , 심도화명 , 박용호 , 정해용 , 배차헌 Ick Jun Kim , Kazuaki Fukamichi , Yonga Ho Park , Hae Yong Jeong , Cha Hurn Bae |
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| Abstract |
| Giant magnetoresistance(GMR) has been investigated for Co_xCu_(100)-x liquid quenched ribbons. Solid solutions were obtained for a concentration with X<15, and the microstructure associated with the spinodal decomposition produced by isothermal aging for Co_(10)Cu_(90) ribbons is closely correlated with the giant magnetoresistance. In the phase decomposition in the constant wave length region, the MR ratio due to the spin dependent scattering increases with the increase in the surface-to-volume ratio. By longer aging, the MR ratio decreases with the increase of the wavelength, while the field dependence of the MR ratio becomes larger in low field due to the coalescence of the magnetic particles. On the other hand, the lower isothermal aging temperature, the shorter periodic fluctuation of the composition, and accordingly the largest MR ratio of 8.1% is achieved by aging at 673K for 166h. |
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