The relationship of electrical properties of Mn-doped Ba_(0.92)Ca_(0.08)TiO_3PTCR (positive temperature coefficient resistance) ceramics with two sintering schedules wasdiscussed. Using TEM (transmission electron micr...The relationship of electrical properties of Mn-doped Ba_(0.92)Ca_(0.08)TiO_3PTCR (positive temperature coefficient resistance) ceramics with two sintering schedules wasdiscussed. Using TEM (transmission electron microscope) combined with EDS (energy dispersive X-rayspectrometer), the Mn ions distributed at grain boundaries were analyzed. The results show that thePTCR effect of Mn-doped PTCR ceramics is more dependent on the sintering schedule than those of Mnfree. The phenomenon may be caused by the valence states variance of Mn ions segregated at the grainboundaries.展开更多
Network management system of LMDS system may be divided into two levels,one is for the whole network called NMS in which the whole access network is included,another is a tool to be used to monitor and configure the l...Network management system of LMDS system may be divided into two levels,one is for the whole network called NMS in which the whole access network is included,another is a tool to be used to monitor and configure the local remote terminals. Specific software can be developed,or one may just telnet to the展开更多
The electron transports in micro-architecture semiconductor are simulated using vertical SOI nMOSFET with different models. Some details in transport can be presented by changing channel length, channel thickness and ...The electron transports in micro-architecture semiconductor are simulated using vertical SOI nMOSFET with different models. Some details in transport can be presented by changing channel length, channel thickness and drain voltage. An interesting phenomenon similar to collimation effect in mesoscopic system is observed. This may suggest the quite intriguing possibility that scattering may open new channel in sufficiently narrow devices. Key words semiconductor - MOSFET - transport - mesoscopic system CLC number TN 303 - TN 304 Foundation item: Supported by the National Defense Foundation of China(99J2. 4. 1. JW0514)Biography: TONG Jian-nong(1961-), male, Ph. D candidate, Senior engineer, research direction: IC design.展开更多
Films of amorphous DyFeCo were deposited on glass substrates using RF sputtering deposition system. The thickness dependence of the coercivity of DyFeCo films prepared under the same sputtering conditions was investig...Films of amorphous DyFeCo were deposited on glass substrates using RF sputtering deposition system. The thickness dependence of the coercivity of DyFeCo films prepared under the same sputtering conditions was investigated. It is found that the composition is nearly thickness independent, while the coercivity is shown to increase with the film thickness increasing at the beginning, then above a certain thickness decrease with the thickness increasing. The thickness dependence of the coercivity is believed to be due to microstructure-induced variations in the short-range order during the film growth. Key words magneto-optical films - coercivity - microstructure CLC number O 469 Foundation item: Supported by the Natural Science Foundation of Hubei Province and State Key Laboratory of Functional for Informatics, Shanghai Institute of Metallurgy, Chinese Academy of Science (2001B060)Biograph: Xiong Rui (1967-), male, Associate professor, Ph. D, research direction: condensed matter physics.展开更多
基金This work is financially supported by the Postdoctoral Research Foundation of the Chinese Education Ministry (No. 023202238)
文摘The relationship of electrical properties of Mn-doped Ba_(0.92)Ca_(0.08)TiO_3PTCR (positive temperature coefficient resistance) ceramics with two sintering schedules wasdiscussed. Using TEM (transmission electron microscope) combined with EDS (energy dispersive X-rayspectrometer), the Mn ions distributed at grain boundaries were analyzed. The results show that thePTCR effect of Mn-doped PTCR ceramics is more dependent on the sintering schedule than those of Mnfree. The phenomenon may be caused by the valence states variance of Mn ions segregated at the grainboundaries.
文摘Network management system of LMDS system may be divided into two levels,one is for the whole network called NMS in which the whole access network is included,another is a tool to be used to monitor and configure the local remote terminals. Specific software can be developed,or one may just telnet to the
文摘The electron transports in micro-architecture semiconductor are simulated using vertical SOI nMOSFET with different models. Some details in transport can be presented by changing channel length, channel thickness and drain voltage. An interesting phenomenon similar to collimation effect in mesoscopic system is observed. This may suggest the quite intriguing possibility that scattering may open new channel in sufficiently narrow devices. Key words semiconductor - MOSFET - transport - mesoscopic system CLC number TN 303 - TN 304 Foundation item: Supported by the National Defense Foundation of China(99J2. 4. 1. JW0514)Biography: TONG Jian-nong(1961-), male, Ph. D candidate, Senior engineer, research direction: IC design.
文摘Films of amorphous DyFeCo were deposited on glass substrates using RF sputtering deposition system. The thickness dependence of the coercivity of DyFeCo films prepared under the same sputtering conditions was investigated. It is found that the composition is nearly thickness independent, while the coercivity is shown to increase with the film thickness increasing at the beginning, then above a certain thickness decrease with the thickness increasing. The thickness dependence of the coercivity is believed to be due to microstructure-induced variations in the short-range order during the film growth. Key words magneto-optical films - coercivity - microstructure CLC number O 469 Foundation item: Supported by the Natural Science Foundation of Hubei Province and State Key Laboratory of Functional for Informatics, Shanghai Institute of Metallurgy, Chinese Academy of Science (2001B060)Biograph: Xiong Rui (1967-), male, Associate professor, Ph. D, research direction: condensed matter physics.
