http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김철기(C. G. Kim),김호철(H. C. Kim),윤석수(S. S. Yoon),박덕근(D. G. Park),홍준화(J. H. Hong),지세환(S. H. Jee) 한국자기학회 1998 韓國磁氣學會誌 Vol.8 No.2
The complex magnetic susceptibility of as-quenched and proton irradiated amorphous ribbons of Fe_(81)B_(13.5)Si_(3.5)C₂ was measured in the frequency range 10 ㎑ ~ 10 ㎒. The frequency spectra of real and imaginary parts of susceptibility showed a typical Debye-type relaxation. Relatively high relaxation frequency, ~3 ㎒ observed in the present work suggested that domain rotation is involved in the relaxation process. The susceptibility at the low frequency decreased with the irradiation, while that at high frequency increased due to the increasing defect density. The relaxation frequency of domain rotation shifted toward higher frequency. due to the increasing pinning force against domain motion by the irradiation.
유권상(K. S. Ryu),김철기(C. G. Kim),김중복(J. B. Kim),김현아(H. A. Kim) 한국자기학회 1996 韓國磁氣學會誌 Vol.6 No.1
We have constructed a displacement sensor for measuring dynamic magnetostriction of an amorphous ribbon under alternating magnetic field using fiber optic Fabry-Perot interferometer. The signal of the sensor was dependent on the index matching oil and the optical isolator. The resolution of the sensor was 30 Å and the measured peak to peak magnetostriction of the amorphous ribbon Fe_(81)B_(13.5)Si_(3.5)C₂ was 28×10^(-6).
Rabi 핵자기 공명법을 이용한 다전류 솔레노이드의 자장균일도 향상
김철기(C.G. Kim),유권상(K.S. Ryu),우병칠(B.C. Woo),김창석(C.S. Kim) 한국자기학회 1992 韓國磁氣學會誌 Vol.2 No.3
The multicurrent method composed of a main and auxiliary currents was used to make the uniform field near the solenoid center. The auxiliary currents were determined to give the spherical symmetry in the field uniformity from the Legendre polynomials. Rabi's NMR system using polarized flowing water has been constructed and the field of a 4-current solenoid has been determined from the resonance frequency. The field uniformity along the solenoid axis has been improved by adjusting the auxiliary currents.
우병칠(B.C. Woo),박포규(P.G. Park),김철기(C.G. Kim),유권상(K.S. Ryu),김창석(C.S. Kim) 한국자기학회 1992 韓國磁氣學會誌 Vol.2 No.2
In the measurement of proton gyromagnetic ratio by a low field technique, the compensation of earth's field is required to keep a zero-field space. The constant earth's fild is compensated by a current flowing through a Helmholtz coil, whereas small time-varying component is compensated automatically by a closed loop of feedback system. A feedback amplifier, and two three-dimensional Helmholtz coils having the same coil constant have been constructed in order to compensate the earth's field. field. Preliminary test performed at the ordinary laboratory showed that the time-varying field of ± 100 nT and the constant field have been reduced to the level of ± 10 nT using the compensating system.