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DEVELOPMENT OF PVC WAVEGUIDE SENSOR FOR MEASUREMENT OF Ca^(++) CONCENTRATION
Kim, Kyung H.,Minamitani, H.,Hisamoto, H.,Suzuki, K.,Kang, S.W.,Sasaki, K. 경북대학교 센서기술연구소 1994 센서技術學術大會論文集 Vol.5 No.1
In this paper, a PVC optical thin film waveguide sensor is proposed which can select a specific ion and measure its concentration depending on materials added into waveguide. In order to investigate the applicability of this sensor to Ca^(++) measurement, the waveguide was fabricated with poly vinyl chloride (PVC), bis ethyl hexyl phthalate (BEHP), lipophilic anionic dye (LAD-3), and ionophore (K23E1) which reacts on Ca^(++). For this purpose, we applied the sensor to sample solution whose CaCl_(2) concentration was gradually altered. In this experiment, we found that this thin film waveguide possessed good light propagation. In addition, it showed the chemical reaction to Ca^(++) enough to select Ca^(++) and measure its concentration. These findings suggested that the proposed PVC optical thin film waveguide ion sensor was very effective in selecting Ca^(++) and measuring its concentration. Also, it will be expected that this sensor is applicable to various ions other than Ca^(++).
Seung-Seok Ha,Nam-Hee Kim,Chun-Yeol You,Sukmock Lee,Ohta, K.,Maruyama, T.,Konishi, K.,Nozaki, T.,Suzuki, Y.,Van Roy, W. IEEE 2009 IEEE transactions on magnetics Vol.45 No.6
<P>We investigated the magnetic anisotropy of ultrathin bcc-Fe (001) films with a fcc-Au(001) cover layer, grown onto GaAs (001) (4 times 1) and (2 times 6)/(3 times 6) reconstructed surfaces. The magneto-optical Kerr effect hysteresis loops revealed existence of a strong in-plane uniaxial magnetic anisotropy in the Fe films grown on both the surfaces. Details of the in-plane uniaxial anisotropy (K<SUB>U</SUB>), cubic anisotropy (K<SUB>C</SUB>), and effective demagnetization field (4piM<SUB>eff</SUB>) were studied by Brillouin light scattering method. We observed a stronger reduction of K<SUB>U</SUB>, K<SUB>C</SUB>, and 4piM<SUB>eff</SUB> in thinner Fe layers (below 1.3 nm) grown on both the surfaces. In the case of Fe films grown on GaAs (4 times 1) surface, anisotropies observed were smaller than that for the (2 times 6)/(3 times 6) surface. This reflects the role of surface structure in determining the magnetic anisotropies.</P>
Preparation and Properties of Inverse Perovskite Mn3GaN Thin Films and Heterostructures
H. Tashiro,R. Suzuki,T. Miyawaki,K. Ueda,H. Asano 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
Thin films and heterostructures of Mn3GaN with an inverse perovskite structure were grownepitaxially on SrTiO3 (001) and (La0.18Sr0.82)(Al0.59Ta0.41)O3 (001) (LSAT) substrates by ionbeam sputtering, and their structural and electrical properties have been investigated. Mn3GaNepitaxial thin films showed metallic behavior of temperature-dependent resistivity with a smallmaximum at 290-340 K. The maximum resistivity could be attributed to the magnetic transitionfrom antiferromagnetism to paramagnetism. It has been found that epitaxial heterostructuresformed by ferroelectric Ba0.7Sr0.3TiO3 and Mn3GaN layers exhibit a large magnetocapacitanceeffect of more than 2000% in an applied magnetic filed of 1.5 T.
Abe, K.,Hieda, K.,Hiraide, K.,Hirano, S.,Kishimoto, Y.,Kobayashi, K.,Moriyama, S.,Nakagawa, K.,Nakahata, M.,Ogawa, H.,Oka, N.,Sekiya, H.,Shinozaki, A.,Suzuki, Y.,Takeda, A.,Takachio, O.,Ueshima, K.,Um North-Holland Pub. Co 2013 Physics letters: B Vol.719 No.1
A search for light dark matter using low-threshold data from the single phase liquid xenon scintillation detector XMASS, has been conducted. Using the entire 835 kg inner volume as target, the analysis threshold can be lowered to 0.3 keVee (electron-equivalent) to search for light dark matter. With low-threshold data corresponding to a 5591.4 kg@?day exposure of the detector and without discriminating between nuclear-recoil and electronic events, XMASS excludes part of the parameter space favored by other experiments.
Photoluminescence of Modulation-Doped ZnSe:Te Grown by Using MBE
K. Imai,Y. Ichinohe,M. Kanamori,K. Kyoh,K. Honma,Na. Kimura,No. Kimura,T. Sawada,K. Suzuki,G. Shigaura 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.5
Modulation-doped ZnSe:Te samples, which indicate quite strong emissions at 2.68 (S1) and 2.42 (S2) eV at low temperatures, have been grown by using MBE. The samples consist of a ZnSe-ZnTe superstructure with ultra-thin ZnTe layers. The sample, which has S1 and S2 emission bands simultaneously, has a carrier transfer process from the S1 to the S2 state. The process leads to a super-linear dependence of the intensity of the S1 emission on the excitation intensity. We predict that the S1 and the S2 band construct a double well potential in the sample which indicates both emissions simultaneously. Modulation-doped ZnSe:Te samples, which indicate quite strong emissions at 2.68 (S1) and 2.42 (S2) eV at low temperatures, have been grown by using MBE. The samples consist of a ZnSe-ZnTe superstructure with ultra-thin ZnTe layers. The sample, which has S1 and S2 emission bands simultaneously, has a carrier transfer process from the S1 to the S2 state. The process leads to a super-linear dependence of the intensity of the S1 emission on the excitation intensity. We predict that the S1 and the S2 band construct a double well potential in the sample which indicates both emissions simultaneously.
An Introduction to the Extraction , Melting and Casting Technologies of Titanium Alloys
Suzuki, K . 대한금속재료학회(대한금속학회) 2001 METALS AND MATERIALS International Vol.7 No.6
The processes of Ti extraction, melting and casting are outlined. In addition, the major process technologies for the precision casting of titanium alloys are studied through a series of basic experiments on such fundamental phenomena as the absorption of oxygen into the sub-surface of the castpart from the molding material, mold filling and defect formation, and the formation of microstructures. Quantitative models for the phenomena being developed based on experimental results may support the production of titanium alloy castparts free from the surface hardened layer and casting defects, and with uniform microstructure throughout the castpart.