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物理学报. 1989, 38(6): 1021-1025.
doi: 10.7498/aps.38.1021.
PrBa2Cu3O7-δ的制备和电子结构
- 收稿日期: 1988-10-11
- 刊出日期: 1989-03-05
摘要: 采用固相反应法制备了正交单相PrBa2Cu3O7-δ样品.运用标准直流四引线法测量了该样品的电阻,发现它随温度的变化呈半导体行为.通过XPS测量表明,样品中明显合有Pr4+.最后从能带结构讨论了PtBa2Cu307-δ不超导的原因.
English Abstract
THE PREPARATION AND ELECTRONIC STRUCTURE OF PrBa2Cu3O7-δ
- Received Date:
11 October 1988
- Published Online:
05 March 1989
Abstract: Single phase samples of PrBa2Cu3O7-δ with orthorhombic structure were prepared by solid State reaction method. Resistance measurement was performed by a standard dc four-probe technique. It is found that the resistance exhibits semiconductor-like behavior. Results of XPS measurement indicate obviously the existence of Pr4+ in PrBa2Cu3O7-δ. Finally, the band structure was used to discuss the reasor why PrBa2Cu3O7-δ does not show superconductivity.
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