HgO-added YBa2Cu3O7-𝛿 superconductors

Pramana

P S R Krishna1¹  R K Singh²  Vilas Shelke¹  Shovit Bhattacharya¹  Rajneesh Mohan1¹  Kiran Singh¹  Mangalesh Dixit¹  N K Gaur¹ 

[1]Department of Physics, Barkatullah University, Bhopal 462 026, India$$

[2]M.P. Bhoj Open University Bhopal 462 016, India$$

关键词: Superconductivity;    solid-state reaction method;    HgO addition;    neutron diffraction.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

The HgO-added YBa2Cu3O7-𝛿 (YBCO) superconductor has been studied for its structural and superconducting properties. Polycrystalline YBCO samples were synthesized through solid-state reaction method by adding HgO in different concentrations without using oxygen annealing. All the samples showed a sharp superconducting transition temperature around 90 K. The X-ray diffraction patterns of all the samples revealed monophasic Y-123 nature. The structural studies were carried out by neutron scattering and Rietveld analysis. The neutron scattering revealed that Hg is not incorporated in the Y-123 system and has shown optimum oxygen concentration. The significant role played by the HgO is to provide oxygen ambient through its decomposition, thus changing the oxygen balance in favour of high Cu-valence state.

【 授权许可】

Unknown