Citation:
Meng Jian, Ren Yufang, Li Xiaoguang. EFFECT OF DOPED V B ELEMENTS ON ELECTRONIC STRUCTURE OF YBa2Cu3O7-y[J]. Chinese Journal of Applied Chemistry,
;1993, 10(4): 26-29.
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Superconductors of type YBa2Cu3-xMxO7-y(My=V,Nb,Ta;x=0.0~0.7) have been prepared. No phase-transition from orthorhombie to tetragonal for x≤0.6 were found by X-ray diffractometry. The lattice parameters of the system vary with the number of x. The D.C. resistivities and the values of Hall effect measured at room temperature showed a progressive increase, but the concentration and the mobility of the carrier decreased gradually with the increase of x. This reveals that the partial substitution by the element of the V B group affects the electronic structure of the superconductor. The change of the electronic structure has been discussed in terms of the crystal field theory.
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Keywords:
- yttrium,
- vanadium,
- niobium,
- tantalum,
- superconductor,
- electronic structure
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