STRUCTURAL INSTABILITIES IN SUPERCONDUCTOR Y-Ba-Cu-O STUDIED BY POSITRON ANNIHILATION

Shaojie Wang; Xiaohua Li; Yilong Chen; Shiqing Li; Guohua Feng; Zhu Wang; Ang Chen; Biaorong Li

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STRUCTURAL INSTABILITIES IN SUPERCONDUCTOR Y-Ba-Cu-O STUDIED BY POSITRON ANNIHILATION

研究论文 | 更新时间：2022-08-16

- STRUCTURAL INSTABILITIES IN SUPERCONDUCTOR Y-Ba-Cu-O STUDIED BY POSITRON ANNIHILATION
- 核技术 Vol. 12, Issue 7, (1989)
- 作者机构：
  
  1.武汉大学
  2.华中理工大学
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：17 November 1988，
  
  Published：1989-07
- 稿件说明：
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Shaojie Wang, Xiaohua Li, Yilong Chen, et al. STRUCTURAL INSTABILITIES IN SUPERCONDUCTOR Y-Ba-Cu-O STUDIED BY POSITRON ANNIHILATION[J]. 核技术, 1989, 12(7): 387-390.
DOI：

Shaojie Wang, Xiaohua Li, Yilong Chen, et al. STRUCTURAL INSTABILITIES IN SUPERCONDUCTOR Y-Ba-Cu-O STUDIED BY POSITRON ANNIHILATION[J]. 核技术, 1989, 12(7): 387-390. DOI：

摘要

本文测量了在100-300K之间随着温度变化的Y-Ba-Cu-O的正电子寿命和多普勒展宽

发现正电子寿命和S参数在130K和260K附近有异常的变化

这意味着与超导相变有关

并认为这些结果是与氧空位的有序度的再调整引起的晶格不稳性相联系.

Abstract

The positron lifetime and Doppler broadening were measured as a function of temperature between 100K and 300K for Y-Ba-Cu-O superconductor. There are anomalous changes in the positron lifetimes and S parameters near 130K and 260K which imply that some phase transitions related to superconductivity happenned there. The results were discussed in terms of the lattice instabilities which may caused by the ordering readjustment of oxygen vacancies.

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references

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Zhao Zhongxian et al . , Int. J. Mod. Phys. , B1 （ 1987 ）, 179 .

He Yusheng , ibid , B1 （ 1987 ）, 351 .

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Chen yilong et al . , Submited to:"Int. conf. on mössbauer effect applidation" , （ Budapest , 1989 ）.

P. Kirkegadd and M. Eldrup , Comp. Phys. Commun. , 7 （ 1974 ）, 401 .

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