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216 results on '"Yu, Y.S."'

30. Enhanced L10 ordering and (001) orientation in FePt: Ag nanocomposite films by monatomic layer deposition

Author

Yu, Y.S., George, T.A., Li, W.L., Yue, L.P., Fei, W.D., Haibo Li, and Sellmyer, D.J.

Subjects
Iron alloys -- Magnetic properties, Iron alloys -- Electric properties, Magnetic recorders and recording -- Analysis, Noise control -- Methods, Platinum -- Magnetic properties, Platinum -- Electric properties, Silver -- Magnetic properties, Silver -- Electric properties, Business, Electronics, Electronics and electrical industries
Published
2010

41. Performance of a large scale scintillating fiber tracker using VLPC readout

Author

Adams, D., Adams, M., Baumbaugh, B., Bertram, I., Bross, A., Casey, D., Chang, S., Chung, M., Cooper, C., Cretsinger, C., Demina, R., Fanourakis, G., Ferbel, T., Grunendahl, S., Hinson, J., Howell, B., Johari, H., Kang, J.S., Kim, C.L., Kim, S.K., Koltick, D., Lobkowicz, R., Margulies, S., Moromisato, J., Narain, M., Park, C.H., Park, Y.M., Reucroft, S., Ruchti, R., Solomon, J., VonGoeler, E., Warchol, J., Wayne, M., Won, E., and Yu, Y.S.

Subjects
United States. Fermi National Accelerator Laboratory -- Equipment and supplies, Nuclear track detectors -- Evaluation, Business, Electronics, Electronics and electrical industries
Abstract

A large scale scintillating fiber tracker using visible light photon counter (VLPC) readout was built as a prototype for the upgraded D0 central tracker. This prototype has been under test at Fermilab for six months using cosmic rays. A description of the components of the tracker including the photodetector, fibers, lightguides, ribbons, and DAQ is given. Preliminary results on detected photon yield, position resolution, efficiency and VLPC performance are presented.

Published
1995

48. Fabrication and characterization of metal-semiconductor field-effect-transistor-type quantum devices.

Author

Son, S.H., Cho, K.H., Hwang, S.W., Kim, K.M., Park, Y.J., Yu, Y.S., and Ahn, D.

Subjects
METAL semiconductor field-effect transistors, LOW temperatures, QUANTUM tunneling, FIELD-effect transistors, GALLIUM arsenide, IONIZATION (Atomic physics)
Abstract

Quantum dot transistors and nanowire transistors are fabricated from a metal-semiconductor field-effect-transistor-type wafer and are characterized at low temperatures. Clear single-electron tunneling and various quantum effects, such as transport through excited states and negative differential resistance, are observed in our wire device. Our data suggest that the potential fluctuation of the heavily doped GaAs layer has a much larger characteristic length than interimpurity spacing, and that this is due to the low ionization rate (approximately 10%) of the dopant atoms at 4.2 K. © 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2004
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49. Effects of total thickness on (001) texture, surface morphology, and magnetic properties of [[Fe/Pt].sub.n] multilayer films by monatomic layer deposition

Author

Yu, Y.S., George, T.A., Li, W.L., Yue, L.P., Fei, W.D., Haibo Li, Mei Liu, and Sellmyer, D.J.

Subjects
Annealing -- Usage, Iron alloys -- Structure, Iron alloys -- Magnetic properties, Iron alloys -- Electric properties, Magnetization -- Analysis, Platinum -- Electric properties, Platinum -- Magnetic properties, Silicon -- Electric properties, Silicon -- Thermal properties, Sputtering (Physics) -- Usage, Physics
Abstract

Atomic-scale [[Fe/Pt].sub.n] multilayer films with different total thickness are prepared on thermally oxidized Si (100) substrates by monoatomic layer deposition and effects of the total thickness on (001) texture, surface morphology and magnetic properties of the postannealed films are examined. The total thickness of the films has affected the exchange-coupling interaction among FePt magnetic grains and the magnetization reversal process.

Published
2010

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