http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Si<SUB>1-x</SUB>Mn<SUB>x</SUB>Te<SUB>1.5</SUB> 단결정의 구조적, 광학적, 자기적 특성에 관한 연구
황영훈(Younghun Hwang),엄영호(Youngho Um),조성래(Sunglae Cho) 한국자기학회 2006 韓國磁氣學會誌 Vol.16 No.3
We have investigated the Mn concentration-dependent structural, optical, magnetic properties in IV-VI diluted magnetic semiconductor Si<SUB>1-x</SUB>Mn<SUB>x</SUB>Te<SUB>1.5</SUB> crystals prepared by the vertical Bridgman technique. X-ray studies showed the single crystalline hexagonal crystal structure. From the optical absorption measurements energy band gap were found to decreases with increasing x and temperature. From the magnetization measurements the samples had ferromagnetic ordering with Curie temperature T<SUB>C</SUB> about 80 K. With increasing Mn concentration, the average magnetic moments per Mn atom determined from the saturated magnetization increased.
묽은 자성 반도체 Cd<SUB>1 - x</SUB>Mn<SUB>x</SUB>Te의 자기 광학적 특성과 응용성 연구
황영훈(Younghun Hwang),엄영호(Youngho Um),조성래(Sunglae Cho) 한국자기학회 2009 韓國磁氣學會誌 Vol.19 No.5
We investigated the magneto-optical properties and application of diluted magnetic semiconductors Cd<SUB>1 ? x</SUB>Mn<SUB>x</SUB>Te crystals with various Mn contents grown using a vertical Bridgman method. This material crystallizes in the zinc-blende structure for values of x < 0.82. The band-gap energy was depended on Mn mole fraction x linearly and increased with decreasing temperature. The Faraday rotation was increased as the photon energy increased near to that of the fundamental band gap and its increased with increasing Mn mole fraction. Optical isolator using the Cd<SUB>0.62</SUB>Mn<SUB>0.38</SUB>Te crystal shows that the isolation and insertion loss are 45 ㏈ and 0.35 ㏈ at 650 ㎚, respectively.
Faraday Rotation of Diluted Magnetic Semiconductors Cd₁-x-yMnxHgyTe Single Crystals
황영훈(Younghun Hwang),김혜경(HyeKyeong Kim),엄영호(YoungHo Um),박효열(Hyoyeol Park),진광수(Gwangsoo Jeen) 한국자기학회 2004 한국자기학회 학술연구발표회 논문개요집 Vol.14 No.2
Cd_(1-x-y)Mn_xHg_yTe single crystals were grown by using the vertical Bridgman method. The Verdet constant was evaluated as a function of the photon energy by using the result for the Faraday rotation. Th Verdet curve was well fitted by using a single-oscillator method and shifted downward at y≥0 due to the exchange interaction. The Faraday rotation decreased linearly with increasing magnetic field from 0 KG to 8 KG.
스마트 윈도우 응용을 위한 광 투과 조절 가능 다공성 엘라스토머 제작
신미라(Mira Shin),이영은(Youngeun Lee),김진경(Jinkyung Kim),심건우(Gun Woo Sim),엄영호(Youngho Eom),김세움(Se-Um Kim),김대석(Dae Seok Kim) 한국고분자학회 2021 폴리머 Vol.45 No.6
연구에서는 압착을 통해 투과도 조절이 가능한 다공성 실리콘 엘라스토머 필름을 제작하고 이를 기반으로 한 스마트 윈도우 응용을 제안한다. Isopropyl alcohol 수용액이 Ecoflex 전구체와 상분리가 되는 것을 이용해 Ecoflex 몸체에 다공성 구조를 가진 필름을 제작하였다. 수백 nm에서 수십 μm 크기의 기공이 Ecoflex 몸체와 굴절률 차이로 가시광 영역에서 산란을 일으키고 필름 압착 시 기공이 닫히면서 투과도 조절이 가능함을 보였다. 광 투과도를 가역적으로, 1초 이하의 빠른 반응속도로 조절할 수 있으며 반복 구동에도 열화가 매우 적음을 확인하였다. 나아가 스마트 윈도우 응용을 위해, 다공성 Ecoflex 필름이 삽입된 압착형 창문을 제작하여 응용성을 시연하였다. 이 다공성 Ecoflex 필름의 제작 공정이 매우 단순하며, 실내 온도 및 조도 유지를 전기적 에너지 없이 가능한 에너지 절약형 스마트 윈도우의 기반 기술로 응용될 수 있다. In this study, we propose a smart window application based on a porous silicone elastomer film that can control light transmittance by compression. A porous elastomeric film was produced by emulsification of isopropyl alcohol aqueous solution in a platinum-catalyzed silicone known as an Ecoflex. It was shown that pores with a size of several hundred nanometers to several tens of micrometers induce light-scattering in the visible light region due to the difference in refractive index with the Ecoflex matrix, and the transmittance could be controlled as the pores were closed by applying compression on the film thickness. It was confirmed that the transmittance can be reversibly adjusted with a fast reaction rate of less than 1 second, and the deterioration is very small even in repeated driving. Furthermore, for smart window application, a press-type window with a porous Ecoflex film was demonstrated. The fabrication process is very simple and economically preferred, and it can be applied as a base technology for an energy-saving smart window that can maintain indoor temperature and illumination without electrical energy.