http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
FeMX(M = Mo, Ta, X=N, C) 박막의 자기 특성 및 미세구조 변화
신동훈(D. H. Shin),최운(W. Choi),김형준(H. J. Kim),남승의(S. Y. Nam),안동훈(D. H. Ahn) 한국자기학회 1995 韓國磁氣學會誌 Vol.5 No.5
Magnetic properties of FeMoN, FeMoTaN, FeTaN and FeTaC films deposited by DC magnetron reactive sputter were investigated, and correlated with their microstructure. FeMoN films were not showen the soft magnetic properties, because of generated Fe₂Mo, Fe_(3-2)N and Fe₄N phases. Ta added films, however, effectivly retarded the α-Fe grain growth and suppressed the generation of Fe nitrides or carbides during heat treatement. The soft magnetic properties of Bs: 15 kG, Hc: 0.25 Oe, μ' 4000(at 5 ㎒), and Bs: 14.5 kG, Hc: 0.25 Oe, μ': 2700 (5㎒) were observed in Fe_(78.8)Ta_(8.5)N_(12.7) and Fe_(75.6)Ta_(8.l)C_(16.3) films, respectively.
FSA를 적용한 초고압 지중송전 XLPE케이블의 부분방전 진단기술
신동훈(D-H Shin),이용성(Y-S Lee),양종석(J-S Yang),박노준(N-J Park),박대희(D-H Park) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
We studied the improved detecting method on Partial Discharge occurred in EHV power cable. In this field, we usually applied the several sensor for partial discharge. This is metal foil employed with the capacity foil-sensor. We detected the partial discharge through regularly array standard foil-sensor for the better improvement of existed foil-sensor in this research. This test is progressed in real EHV liveline, we analyzed that compare existed foil-sensor to detect character of FSA(Foil Sensor Array) for this test. From this result, detective character of fabricated FSA showed better result than existed foil-sensor.
100 ㎚ T-gate의 InGaAs/InAlAs/GaAs metamorphic HEMT 소자 제작 및 특성에 관한 연구
김형상(H. S. Kim),신동훈(D. H. Shin),김순구(S. K. Kim),김형배(H. B. Kim),임현식(Hyunsik Im),김현정(H. J. Kim) 한국진공학회(ASCT) 2006 Applied Science and Convergence Technology Vol.15 No.6
본 논문에서는 100 ㎚ 게이트 길이를 갖는 InGaAs/InAlAs/GaAs MHEMT(metamorphic high electron mobility transistors)m의 DC와 RF 특성을 분석 하였다. 이중 노광 방법으로 ZEP520/P(MMA-MAA)/ PMMA 3층 구조의 레지스터와 게이트 길이 100 ㎚인 T-게이트를 제작하였다. 게이트의 단위 폭이 70 m인 2개의 게이트와 길이가 100 ㎚로 제작된 MHEMT를 DC 및 RF특성을 조사하였다. 최대 드레인 전류 밀도는 465 ㎃/㎜, 상호전달 컨덕턴스는 844 mS/㎜이, RF 측정으로부터 전류 이득 차단 주파수는 192 ㎓와 최대 진동주파수 310 ㎓인 특성을 보였다. We present the DC and RF characteristics of 100 ㎚ gate length InGaAs/InAlAs/GaAs metamorphic high electron mobility transistors (MHEMTs). We fabricated the T-gate with 100 ㎚ foot print by using a positive resist ZEP520/P(MMA-MAA)/PMMA trilayer by double exposure method. The fabricated 100 ㎚ MHEMT with a 70 ㎛ unit gate width and two fingers were characterized through dc and rf measurements. The maximum drain current density of 465 ㎃/㎜ and extrinsic transconductance (gm) of 844 mS/㎜ were obtained with our devices. From rf measurements, we obtained the current gain cut-off frequency (fT) of 192 ㎓, and maximum oscillation frequency (fmax) 310 ㎓.
상온 및 액체질소 온도에서 고속 중성자 조사된 원자로 압력 용기의 취화 현상에 관한 연구
김형배(H. B. Kim),김형상(H. S. Kim),김순구(S. K. Kim),신동훈(D. H. Shin),유연봉(Y. B. Yu),고정대(J. D. Ko) 한국자기학회 2005 韓國磁氣學會誌 Vol.15 No.2
The embrittlement of fast neutron-irradiated reactor pressure vessel (RPV) steels was investigated by X-ray diffraction patterns at room temperature and Mossbauer spectroscopy at room- and liquid nitrogen-temperature. Neutron fluence on the samples were 10¹², 10¹³, 10¹⁴, 10^(15), 10^(16), 10^(17), 10^(18) n/㎠. The X-ray diffraction patterns showed that the structure of the neutron unirradiated sample was bcc type, where as but the neutron irradiated samples with the fluence higher than 1017 n/㎠ were so severely damaged, that bcc type structure disappeared. The Mossbauer spectra of all samples showed superposition of two or more sextets. In this paper all Mossbauer spectra were fitted by three set of sextet. The isomer shift and quadrupole splitting values were found around zero. At liquid nitrogen temperature, magnetic hyperfine field and absorption area increase rapidly S1 sextet in the samples of 1017~1018 n/㎠ neutron fluences. And at room temperature, magnetic hyperfine field and absorption increased rapidly at S1 sextet in the samples of 1017~1018 n/㎠ neutron fluences. This rapid increase of magnetic hyperfine field and absorption area were inferred to be caused by the change of (56)^Fe, (55)^Mn into (57)^Fe due to by neutron irradiation.
FeTaNC 초미세결정박막의 반응가스 분압에 따른 자기특성 변화
고태혁(T. H. Koh),신동훈(D. H. Shin),김형준(H. J. Kim),남승의(S. E. Nam),안동훈(D. H. Ahn) 한국자기학회 1996 韓國磁氣學會誌 Vol.6 No.3
Magnetic properties and microstructures of FeTaNC thin films, which were deposited by magnetron reactive sputtering method, were investigated as a function of CH₄ and N₂ gas partial pressures. Magnetic properties of FeTaNC films depended on total reactive gas pressure as well as CH₄/N₂ pressure ratios. For reactive gas partial pressures of 5~10%, optimum magnetic properties were observed in the FeTaNC films with proper CH₄/N₂ ratio. On the other hand, at 15 % of gas partial pressure, FeTaN and FeTaC films showed superior properties to FeTaNC films. Above 15%, the magnetic properties of films rapidly degraded due to an excess incorporation of C and/or N atoms. Excellent soft magnetic properties of 17 kG of Bs, 0.3 Oe of Hc, and 4000 of μ′ (at 5 ㎒) were obtained in the FeTaNC films. High permeabilities of FeTaNC films could be explained by the Fe lattice distortion caused by N atoms, hence reduction of magnetic anisotopy. While precipitated TaN and TaC particles effectively supress the growth of α-Fe grains leading to a good soft magentic properties, FeN and FeC phases such as Fe₃N, Fe₄N, Fe_xC have detrimental effects.