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안일중(I . J . Ahn),박용수(Y . S . Park),김종오(J . O . Kim),김용민(Y . M . Kim) 대한산부인과학회 1998 Obstetrics & Gynecology Science Vol.41 No.12
A 29-years old womon visited for high MS AFP level checked at private clinic and we performed amniocentesis for amniotic fluid AFP and phenotyping. The phenotype of the fetus was 47 XXY. After genetic counseling, the patient and her husband determined to take pregnancy termination.
김택수(T. S. Kim),김종오(C. O. Kim),이중환(J. W. Lee),윤선진(S. J. Yun),김좌연(J. Y. Kim) 한국자기학회 1996 韓國磁氣學會誌 Vol.6 No.5
Thin films of Fe-Zr-N were fabricated by rf magnetron reactive sputtering method. The saturation magnetization and coercivity as functions of annealing temperature and partial pressure of nitrogen gas, effective permeability at high frequencies, and thermal stability were investigated. Magnetic softness was exhibited in the composition range of Fe_(72-78)Zr_(7-10)N_(15-18) which was boundary between polycrystalline and amorphous structure. These films exhibited magnetic softness with saturation magentic flux density of 1.55 T and effective permeability of about 3000 at 1 ㎒. These films also exhibited thermal stability by sustaining effective permeability of 2500 or above as the temperature was raised to 550 ℃. It is assumed that good magnetic softness is obtained because grain growth of α-Fe is prohibited due to the precipitation of ZrN nanocrystals. The grain sizes of α-Fe films were 40~50 Å and the grain sizes of ZrN nanocrystals were 10~15 Å.
비정질 Fe - Co - RE - B (RE=Nd, Sm, Gd, Tb) 합금의 자기적 성질
김경섭(K. S. Kim),유성초(S. C. Yu),김창식(C. S. Kim),김종오(J. O. Kim) 한국자기학회 1991 韓國磁氣學會誌 Vol.1 No.2
The temperature-dependent magnetization curves of amorphous Fe-Co-(Nd, Sm, Gd, Tb)-B alloys were measured using a vibrating sample magnetometer from 77 K up to 900 K. The spin wave stiffness constants and the range of the exchange interaction were calculated from the saturation magnetization values at 0 K, Curie temperatures and the Bloch coefficients estimated from the saturation magnetization curves. The low temperature dependence of magnetization is in good agreement with Bloch relation, Ms(T)=Ms(O) (1-BT^(3/2)-CT^(5/2)). The spin wave stiffness constant and the range of exchange interaction are decreased by substitution of heavy rare earth (Tb, Gd).