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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.
이재광,권태송,박기택,김철구,조육 연세대학교 자연과학연구소 1984 學術論文集 Vol.13 No.-
Thomas-Fermi 근사와 Resta의 모델을 사용하면 r-공간의 반도체 유전함수를 계산할 수 있다. 그러나 절대온도 OK에서는 반도체에 Resta의 모델을 적용하는 것이 개념상 곤란하므로, Lannoo와 Allan의 모델과 TF방정식을 이용하여 Resta모델의 문제점을 해결한 간단하고 해석적인 유전함수를 구하였다. 이때 구한 유전함수는 Resta의 결과에 비하여 정밀한 수치계산 값과 더 잘 일치하였다. r-space dielectric function can be obtained by using the Thomas-Fermi approximation and the Resta’s model. However, the Resta’s model encounters a conceptual difficulty when applied to semiconductors at the absolute zero temperature. By applying the Lannoo and Allan model to the Thomas-Fermi equation, we obtained a simple and analytic dielectric constant which is at the same time free of the difficulties encounted in the Resta’s model. The obtained dielectric function gives a better agreement with a more elaborate numerical calculation than the Resta’s result.