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Permalloy / Al₂O₃ / Co 접합의 자기터널 효과
이민숙(M. S. Lee),송현주(H. J. Song),장현숙(H. S. Jang),김미양(M. Y. KIM),이장로(J. R. Rhee),이용호(Y. H. Lee) 한국자기학회 1993 韓國磁氣學會誌 Vol.3 No.1
Magnetoresistance was studied for the ferromagnetic tunneling junction in permalloy / Al₂O₃ / Co prepared by evaporation in a vacuum of 1 × 10^(-6) Torr. We measured voltage-current characteristic and magnetic valve effect of prepared ferromagnetic tunneling junction sample. We investigated field-dependency of tunnel resistance by Wheat-stone bridge method and measured magnetic hysteresis curve by vibrating sample magnetometer. The tunneling is confirmed by measuring voltage-current characteristic. The hysteresis curve of magnetoresistance corresponds well with that of magnetization. The magnetoresistance ratio △R/R is 0.6% at room temperature.
이장로(J. R. Rhee),장현숙(H. S. Jang),김미양(M. Y. Kim),이용호(Y. H. Lee),손봉균(P. K. Shon) 한국자기학회 1992 韓國磁氣學會誌 Vol.2 No.2
Studies have been done experimentally to investigate the effects of the Fe sublayer thickness on magnetization, anisotropy, and Kerr rotation in 8.8Å Tb/ XÅ Fe (X = 5.4~11) compositionally modulated films prepared in a multiple-gun sputtering chamber with rotating table. The ranges of Fe sublayer thickness required for perpendicular anisotropy were determined. The interface and volume anisotropy energies for Tb/Fe films were estimated. The annealing tempereture dependence of magnetic and magneto-optic properties has been discussed.