(orig.)Wilson, C COAIS Hull and C C Wilson (1992) The defect structure of anion-excess (Ca1_xYx)F2+x with x=0.06. J Sol State Chem 100 101-i 14.
采用传统的固相反应法制备铋层结构铁电陶瓷材料Ca1-xYxBi4Ti4O15+x/2(x=00.1)(简称CYBT),研究了钇离子掺杂对CYBT陶瓷的烧结、晶相组成、显微形貌及电性能的影响。Y3+的A位取代,可以改善CYBT陶瓷的烧结性能,提高体积密度和瓷体致密度。Y3+的引入促进晶粒沿c轴方向生长,晶粒各
Inverse photoemission spectroscopy has been performed for Bi2Sr2Ca1−xYxCu2O8single crystal (x=0.0) and ceramics samples (x=0.0, 0.3 and 0.5) to investigate the unoccupied electronic structure. Angle-resolved measurement on a single crystal shows that there are two bands crossing the Fermi level...
Although the compounds have a large decrease in anisotropy along the c axis, partial occupancy of Y 3+ in the Ca 2+ layer adjacent to the CuO 2 conduction plane is detrimental to the flux pinning behavior. This study suggests that the presence of defects in the proximity of the conduction...
When the oxygen contents decreased, the period of modulation in Bi 2 Sr 2 Ca 0.4 Y 0.6 Cu 2 O 8+y increased from 4.2b to 4.4b.doi:10.1016/0921-4534(91)91621-AF. MunakataT. KawanoH. YamauchiY. InouePhysica C Superconductivity
A new tetragonal high-T-c superconductor, AlSr2Ca2-xYxCu3O9 was prepared under a high pressure of 5 or 6 GPa. This phase is the n=3 member of the superconducting family AlSr2Can-1CunO2n+3. Superconductivity was observed in the range of 0 less than or equal to x less than or ...
The influence of substitution of composition elements on the thermoelectric power (TEP) and microhardness (VHN) of Bi2Sr2Ca1−xYxCu2O8+δ, with 0.0≤x≤0.75, was investigated. Experiments studying the TEP or Seebeck coefficient (S) for the examined samples yielded, with increasing x, the car...
Phase diagram and dependence of the critical temperature T c on the pressure for Tl 0.5 Pb 0.5 Sr 2 Ca 1− x Y x Cu 2 O 7Phase diagram and dependence of the critical temperature T c on the pressure for Tl 0.5 Pb 0.5 Sr 2 Ca 1− x Y x Cu 2 O 7doi:10.1016/S0921-4534(...
We report that the thermopowerQ(T) of the (La1xYx)0.67Ca0.33MnO3(x=0–0.25) magnetoresistive oxides, displays a pronounced peak at temperaturesTsclose to the ferromagnetic ordering temperature. The temperatureTsdecreases monotonously when increasingxwhereas the maximalQ(Ts) is found to increase wi...
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