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Your search keyword '"Jinggeng, Zhao"' showing total 3 results
Start Over Author "Jinggeng, Zhao" Journal journal of the american chemical society
3 results on '"Jinggeng, Zhao"'

1. Structure stability and compressibility of iron-based superconductor Nd([O.sub.0.88][F.sub.0.12])FeAs under high pressure

Author

Jinggeng Zhao, Luhong Wang, Dawei Dong, Zhiguo Liu, Genfu Chen, Dan Wu, Jianlin Luo, Nanlin Wang, Yong Yu, Changqing Jin, and Quanzhong Guo

Subjects
Iron -- Chemical properties, Neodymium -- Chemical properties, Phase transformations (Statistical physics) -- Analysis, Superconductors -- Mechanical properties, Superconductors -- Chemical properties, X-rays -- Diffraction, X-rays -- Usage, Chemistry
Abstract

The isostructural phase transition is observed in iron-based superconductor Nd([O.sub.0.88][F.sub.0.12])FeAs under high pressure. Diamond anvil cell (DAC) techniques with an in situ angle dispersive synchrotron X-ray diffraction are used to create high pressure.

Published
2008

2. Struture stability and compressibility of iron-based superconductor Nd(O0.88F0.12)FeAs under high pressure

Author

Dan Wu, Dawei Dong, Quanzhong Guo, Nanlin Wang, Jianlin Luo, Changqing Jin, Genfu Chen, Zhiguo Liu, Haozhe Liu, Yong Yu, Jinggeng Zhao, and Luhong Wang

Subjects
Superconductivity, Phase transition, Condensed matter physics, Rietveld refinement, Chemistry, General Chemistry, Biochemistry, Catalysis, Isothermal process, Tetragonal crystal system, Iron-based superconductor, Colloid and Surface Chemistry, Phase (matter), Isostructural
Abstract

The high-pressure angle-dispersive X-ray diffraction experiments on the iron-based superconductor Nd(O0.88F0.12)FeAs were performed up to 32.7 GPa at room temperature. An isostructural phase transition starts at approximately 10 GPa. When pressure is higher than 13.5 GPa, Nd(O0.88F0.12)FeAs completely transforms to a high-pressure phase, which remains the same tetragonal structure with a larger a-axis and smaller c-axis than those of the low-pressure phase. The ambient conditions isothermal bulk moduli B0 are derived as 102(2) and 245(9) GPa for the low-pressure phase and high-pressure phase, respectively. The structure analysis based on the Rietveld refinement methods shows the difference of pressure dependence of the Fe-As and Nd-(O, F) bonding distances, as well as As-Fe-As and Nd-(O, F)-Nd angles between the low-pressure phase and high-pressure phase.

Published
2008

3. Struture Stability and Compressibility of Iron-Based Superconductor Nd(O0.88F0.12)FeAs under High Pressure.

Author

Jinggeng Zhao, Luhong Wang, Dawei Dong, Zhiguo Liu, Haozhe Liu, Genfu Chen, Dan Wu, Jianhin Luo, Nanhin Wang, Yong Yu, Changqing Jin, and Quanzhong Guo

Subjects
*INDUSTRIAL chemistry, *HIGH pressure (Technology), *PROPERTIES of matter, *HIGH pressure (Science), *PRESSURE
Abstract

The article reports on the structure stability and compressibility of iron-based superconductor Nd(O0.88F0.12)FeAs under high pressure. It discusses research on La(O1-xFxFeAs (x=0.05-0.12) and the use of Nd(O0.88F0.12)FeAs to examine properties under high pressure. An experiment using a diamond anvil cell technique with an angle-dispersive synchroton X-ray diffraction technique resulted in pressure-induced structural transition.

Published
2008
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