MGB

作品数：175被引量：486H指数：10
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Ultrasonic Properties of the MgB_(2) Superconductor
《Chinese Physics Letters》2001年第10期1369-1370,共2页LI Shao-Chun WANG Ru-Ju LI Feng-Ying LIU Zhen-Xing ZHU Jia-Lin YU Ri-cheng JIN Chang-Qing 
Supported by the Outstanding Youth Fund of the National Natural Science Foundation of China under Grant No.59725105;the“Hundreds of Talents”Programme of the Chinese Academy of Sciences。
The sound velocities of longitudinal and shear waves are measured on a polycrystalline MgB_(2) superconductor with Tc of 39 K. The specimen used in the experiments is pressed and heated using the MgB_(2) powder. The e...
关键词：HEATED SUPERCONDUCTOR SUPERCONDUCTOR 
Isostructural Transition of MgB_(2) Under High Pressure
《Chinese Physics Letters》2001年第10期1401-1403,共3页Sun Li-ling TKikegawa WU Qi ZHAN Zai-ji WANG Wen-Kui 
Supported by the National Natural Science Foundation of China under Grant No.10004014;the synchrotron radiation experiments were carried out under Approval No.2001PF-03 of the Photon Factory.
The high-pressure behaviour of the superconductor MgB_(2) with a hexagonal structure has been investigated by the in situ synchrotron radiation x-ray diffraction method under pressures up to 42.2 GPa in a diamond anvi...
关键词：STRUCTURAL TRANSITION HEXAGONAL 
Josephson Effect in MgB_(2): Large I_(c)R_(N) Product and Superconducting Energy Gap
《Chinese Physics Letters》2001年第9期1254-1255,共2页XUAN Yi LI Zhuang-Zhi TAO Hong-Jie REN Zhi-An CHE Guang-Can ZHAO Bai-Ru ZHAO Zhong-Xian 
Supported by the State Key Program for Basic Research of China;the National Center for Research&Development on Superconductivity.
We report on the observation of the Josephson effect on the newly discovered superconductor MgB_(2) with the breakjunction technique. Similar to conventional superconductors, the I-V curve can be fitted with the resis...
关键词：technique. value. JOSEPHSON 
Superconducting MgB_(2) Thin Films with Tc ≈ 39 K Grown by Pulsed Laser Deposition
《Chinese Physics Letters》2001年第7期967-968,共2页WANG Shu-Fang DAI Shou-Yu ZHOU Yue-Liang CHEN Zheng-Hao CUI Da-Fu XU Jia-Di HE Meng LÜHui-Bin YANG Guo-Zhen 
Supported by a grant from the State Kay Program of China and the National Natural Science Foundation of China.
Superconducting MgB_(2) thin films were fabricated on Al_(2)O_(3)(0001)substrates under an ex situ processing conditions.Boron thin films were deposited by pulsed laser deposition followed by a post-annealing process....
关键词：structure. conditions. process. 
Strong Quantum Fluctuation of Vortices in Bulk Samples of the New Superconductor MgB_(2)被引量：1
《Chinese Physics Letters》2001年第6期816-819,共4页WEN Hai-Hu LI Shi-Liang ZHAO Zhi-Wen NI Yong-Ming REN Zhi-An CHE Guang-Can YANG Hai-Peng LIU Zhi-Yong ZHAO Zhong-Xian 
Supported by the National Natural Science Foundation of China under Grant No.19825111;the Ministry of Science and Technology of China(NKBRSF-G1999064602).
By using transport and magnetic measurement,the upper critical field H_(c2)(T)and the irreversibility line Hirr(T)has been determined.A big separation between H_(c2)(0)and Hirr(0)has been found showing the existence o...
关键词：temperature. QUANTUM RELAXATION 
Low Temperature Specific Heat of Superconducting MgB_(2)
《Chinese Physics Letters》2001年第6期820-822,共3页LUO Jian-Lin ZHANG Jie CHEN Zhao-Jia BAI Hai-Yang WANG Yu-Peng MENG Ji-Bao JIN Duo REN Zhi-An CHE Guang-Can ZHAO Zhong-Xian 
Supported by the National Natural Science Foundation of China under Grant No.19825111.
The specific heat of the recently discovered superconductor MgB_(2) has been measured at temperatures ranging from 4.5 to 80 K.Superconducting anomalyΔC at Tc is clearly observed.The total specific heat in normal sta...
关键词：INTERMETALLIC SUPERCONDUCTOR ELECTRONIC 
Upper Critical Field and Irreversibility Line Determined by Transport Measurement of the New Superconductor MgB_(2)
《Chinese Physics Letters》2001年第6期823-825,共3页JIN Hao WEN Hai-Hu LI Shi-Liang ZHAO Zhi-Wen NI Yong-Ming REN Zhi-An CHE Guang-Can YANG Hai-Peng LIU Zhi-Yong ZHENG Dong-Ning ZHAO Zhong-Xian 
Supported by the Ministry of Science and Technology of China(NKBRSF-G19990646);the National Natural Science Foundation of China under Grant No.19825111.
Resistive transitions of the new superconductor MgB_(2) are carried out under magnetic fields from 0 to 8 T.It is found that the irreversibility field Hirr(T)and the upper critical field Hc2(T)obtained are very close ...
关键词：ACTIVATION UPPER THERMAL 
Preparation and Characterization of the New Superconductor MgB_(2)
《Chinese Physics Letters》2001年第4期587-588,共2页SUN Yu-Ping SONG Wen-Hai DAI Jian-Ming WU Xing-Cai WANG Kai-You ZHAO Bing XIAO Hong DU Jia-Ju WEN Hai-Hu ZHAO Zhong-Xian 
Supported by the Ministry of Science and Technology of China(NKBRSF-G1999064602);the National Natural Science Foundation of China under Grant No.59872043;the Fundamental Research Bureau,Chinese Academy of Sciences.
Polycrystalline samples of the new superconductor MgB_(2) are prepared by solid state reaction using Mg and B powders.The resistance measurement shows that the onset transition temperature and zero resistance transiti...
关键词：RESISTANCE TRANSITION SUPERCONDUCTOR 
Superconducting Properties of MgB_(2) Prepared by High Pressure and Ambient Pressure
《Chinese Physics Letters》2001年第4期589-591,共3页REN Zhi-An CHE Guang-Can ZHAO Zhong-Xian CHEN Hong DONG Cheng NI Yong-Ming JIA Shun-Lian WEN Hai-Hu 
Supported by the Ministry of Science and Technology of China(NKBRSF-G19990646);the National Natural Science Foundation of China under Grant No.19825111。
The new superconductor MgB_(2) has been prepared by two ways: high pressure and ambient pressure synthesis. Their superconducting properties were measured and compared. It is found that the sample prepared by high pre...
关键词：synthesis. AMBIENT SUPERCONDUCTOR 
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