The incommensurate structure of high-T<sub>c</sub> superconductors in the Bi-Sr-Ca-Cu-O system
D Y Yang; J Q Li; F H Li; Y Q Zhou; L Q Chen; Y Z Huang; Z Y Ran; Z X Zhao; D Y Yang; Inst. of Phys., Acad. Sinica, Beijing, China; J Q Li; Inst. of Phys., Acad. Sinica, Beijing, China; F H Li; Inst. of Phys., Acad. Sinica, Beijing, China; Y Q Zhou; Inst. of Phys., Acad. Sinica, Beijing, China; L Q Chen; Inst. of Phys., Acad. Sinica, Beijing, China; Y Z Huang; Inst. of Phys., Acad. Sinica, Beijing, China; Z Y Ran; Inst. of Phys., Acad. Sinica, Beijing, China; Z X Zhao; Inst. of Phys., Acad. Sinica, Beijing, China
Журнал:
Superconductor Science and Technology
Дата:
1988-08-01
Аннотация:
The new superconductor BiSrCaCu<sub>2</sub>O<sub>y</sub> with T<sub>c</sub> above 80 K has been studied by electron diffraction and high-resolution electron microscopy. The crystal structure is observed to be one-dimensional incommensurate. The unit cell of the average structure is orthogonal with cell parameters a=0.539 nm, b=0.541 nm, c=3 nm. The periodicity of the incommensurate modulation is 2.53 nm and the direction of modulation is slightly deviated form the b axis.
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