搜索结果: 16-30 共查到“理学 Ba”相关记录91条 . 查询时间(0.062 秒)
Mesoporous Ba/MCM-41 type materials (Ba/MCM-41) with high Ba/Si molar ratios between 0.025 and 0.1 were synthesized by direct hydrothermal synthesis. The samples were characterized by XRD, nitrogen ad...
Late Campanian Rudist Assemblages and Biometrical Analysis of Pseudopolyconites from Bačevica (Eastern Serbia)
Rhythms succession Biometrical analyses
2010/12/20
The lithological and faunal succession cropping out close to the famous palaeontological locality of Bacevica (Eastern Serbia) is described along a very discontinuous and ill-exposed section. Since th...
Mesoporous Ba/MCM-41 type materials (Ba/MCM-41) with high Ba/Si molar ratios between 0.025 and 0.1 were synthesized by direct hydrothermal synthesis. The samples were characterized by XRD, nitrogen ad...
High spatial resolution monitoring of the activity of BA supergiant winds
High spatial resolution the activity BA supergiant winds
2011/1/13
There are currently two optical interferometry recombiners that can provide spectral resolutions better than 10000, AMBER/VLTI operating in the H-K bands, and VEGA/CHARA, recently commissioned, opera...
Antiferromagnetic ordering in the absence of a structural distortion in Ba(Fe{1-x}Mn{x})2As2
Stripe Antiferromagnetic structural distortio
2010/11/22
Neutron and x-ray diffraction studies of Ba(Fe1−xMnx)2As2 for low doping concentrations (x 6 0.176)reveal that at a critical concentration, 0.102 < x < 0.118, the tetragonal-to orthorhombic tran...
Commensurate antiferromagnetic ordering in Ba(Fe{1-x}Co{x})2As2 determined by x-ray resonant magnetic scattering at the Fe K-edge
Commensurate antiferromagnetic x-ray resonant magnetic Fe K-edge
2010/11/22
We describe x-ray resonant magnetic diffraction measurements at the FeK-edge of both the parent BaFe2As2 and superconducting Ba(Fe0.953Co0.047)2As2 compounds. From these high-resolution measurements w...
Electronic States and Superconducting Transition Temperature based on the Tomonaga-Luttinger liquid in Pr$_{2}$Ba$_{4}$Cu$_{7}$O$_{15-\delta}$
Pr2Ba4Cu7O15− first-principles calculations CuO double chain superconductivity
2010/11/17
An NQR experiment revealed superconductivity of Pr2Ba4Cu7O15− (Pr247) to be realized
on CuO double chain layers and suggests possibility of novel one-dimensional(1D) superconduc-
tivity. To c...
Influenced of Fe buffer thickness on the crystalline quality and the transport properties of Fe/Ba(Fe1-xCox)2As2 bilayers
buffer thickness crystalline quality transport properties
2010/11/17
The implementation of an Fe buffer layer is a promising way to obtain epitaxial growth of Co-doped BaFe2As2 (Ba-122). However, the crystalline quality and the superconducting properties of Co-doped Ba...
Symmetry breaking orbital anisotropy on detwinned Ba(Fe1-xCox)2As2 above the spin density wave transition
Symmetry breaking orbital anisotropy detwinned Ba
2010/11/17
Nematicity, defined as broken rotational symmetry, has recently been observed in the competing phases in proximity to the superconducting phase in the high TC cuprates (1-2). Similarly, the new iron-b...
Normal state resistivity of Ba$_{1-x}$K$_x$Fe$_2$As$_2$: evidence for multiband strong-coupling behavior
Normal state resistivity multiband strong-coupling behavior
2010/11/19
We present theoretical analysis of the normal state resistivity in multiband superconductors in the framework of Eliashberg theory. The results are compared with measurements of the temperature depend...
Calorimetric Evidence for Nodes in the Overdoped Ba(Fe$_{0.9}$Co$_{0.1}$)$_{2}$As$_{2}$
Calorimetric Evidence
2010/11/25
We present low-temperature specific heat of the electron-doped Ba(Fe0.9Co0.1)2As2, which does
not show any indication of an upturn down to 400 mK, the lowest measuring temperature. The
lack of a Sch...
Critical-doping universality for cuprate superconductors: Oxygen nuclear-magnetic-resonance investigation of Ca(x)La(1-x)Ba(1.75-x)La(0.25+x)Cu(3)O(y)
cuprate superconductors Oxygen nuclear-magnetic-resonance investigation
2010/11/18
The critical doping levels in cuprates, where the ground state changes its nature (from an an-
tiferromagnet to a spin glass to superconductor to metal), are not universal. We investigate the origin ...
铽配合物Tb(BA)3phen的有机电致发光
稀土 配合物 电致发光
2010/3/22
合成了一类新型稀土配合物Tb(BA)3phen，将其掺杂到导电聚合物PVK中获得了纯正、明亮的绿光发射。用这种搀杂体系分别制作了单层发光器件和双层器件。对于单层器件，掺杂浓度为1∶5，甩膜转速1 000 r·min-1时器件的发光效果最好，起亮电压为10 V，最大亮度在21 V时可达26.8 cd·m-2。双层器件用AlQ作为电子传输层，通过改变其厚度得到了发光性能较好的用AlQ作为电子传输材料的...
Bi-Ba-Fe-O-Cl棱柱形微米-纳米管
微米管 纳米管 正交晶系 光电极
2009/12/9
用固体反应直接生长法合成一种过渡金属氯氧化合物无机纳米微米管.它具有特殊的四方棱柱外形.根据SEM测定，该纳米微米管外径为100～500 nm, 有的更小，内径是外径的五分之三,约60－300 nm.根据XRD、TEM 和SEM测定，这种纳米微米管晶体属于正交晶系，其晶格常数为a=0.5864(2)nm, b=0.6032(2)nm, c=2.972(2)nm.具有半导体性质. 由log(1/ρ...