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박춘만(C. M. Park),강세권(S. K. Kang),이경복(K. B. Lee),김철구(C. K. Kim),남균(K. Nahm),장경호(K. H. Chang),김윤배(Y. B. Kim),김창석(C. S. Kim) 한국자기학회 1992 韓國磁氣學會誌 Vol.2 No.1
Deuterium was injected into melt-spun ribbons of α-Fe_(90)Zr_(10) using the electrolytic hydrogenation method, and the magnetic properties of these α-DxFe_(90)Zr_(10) ribbons were studied. By comparing these results with those of α-HxFe_(91)Zr_9, the effects of phonons to magnetic properties were investigated. The Curie temperature Tc and the spontaneous magnetizations of the D_(47)Fe_(90)Zr_(10) and the Fe_(90)Zr_(10) were studied using the Mossbauer spectroscopy. From these investigations, it was found that the Curie temperature of DxFe_(90)Zr_(10) was 75K higher than that of Fe_(90)Zr_(10). It was believed that this indicated the importance of local deformation to the amorphous magnetism. Also by comparing the spontaneous magnetizations of D_(47)Fe_(90)Zr_(10) with those of Fe_(90)Zr_(10) as a function of temperature, it was found that the deuterium injection reduced the fluctuation of exchange integral.
Cu / Co 다층 박막에서의 거대 자기 저항과 자기 비등방성
박춘만(C. M. Park) 한국자기학회 2003 韓國磁氣學會誌 Vol.13 No.6
The anomalous angular modulation of magnetoresistance in Co/Cu multilayers is explained assuming substrate-induced magnetic anisotropy. The magnetic parameters of Co/Cu multilayers is determined using angular modulation of magnetoresistance and theoretical model including substrate-induced anisotropy. This mechanism introduces a new possible way of modulating the giant magnetoresistance.
박춘만(C. M. Park),이상훈(S. H. Lee),김승훈(Seung Hoon Kim),장희동(Hee Dong Jang) 한국자기학회 2003 韓國磁氣學會誌 Vol.13 No.1
We have grown Dy_xBi_(3-x)Fe_5O_₁₂ (x=0.5, 1.0, 1.5, 2.0) magnetic garnet thin films upon Al₂O₃ and GGG substrate using Pechini process. The annealing temperature to get single phase Dy_xBi_(3-x)Fe_5O₁₂ garnet is dependent on substrate, i.e. the annealing temperature for GGG substrate is 50℃ lower than that for Al₂O₃ substrate. The grains of garnet thin film grown on GGG (111) plane align along [111] direction, and in this case the hysteresis curve does not saturate up to H = 5000 Oe. We attribute this phenomenon to rotation magnetization process. The maximum amount of Bi substitution in polycrystalline Dy_xBi_(3-x)Fe_5O₁₂ thin film prepared by Pechini process is restricted to 2.0 Bi atom/unit cell, and this value is less than that in single garnet crystall grown by LPE method.