Phase formation of superconducting MgB2 at ambient pressure

Bulletin of materials science

A Talapatra¹  A Sarkar¹  S K Bandyopadhyay¹  P Barat¹  Pintu Sen¹ 

[1] Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700 064, India$$Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700 064, IndiaVariable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700 064, India$$

关键词: MgB2;    low-pressure synthesis;    superconductivity.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

MgB₂ superconductor has been synthesized using a simple technique at ambient pressure. The synthesis was carried out in helium atmosphere over a wide range of temperatures. Magnesium was employed in excess to the stoichiometry to prevent the decomposition of MgB₂. Samples of MgB₂ thus prepared have been almost free from MgO as compared to other methods. Resistivities of the samples are quite low with residual resistivity ratio (RRR) of around 3. ð‘�??_c (ð‘�?? = 0) is 38.2â€�??38.5 K with 𝛥ð�?��??_c of 0.6â€�??1.0 K. Comparative studies of various methods of low pressure synthesis have been presented.

【 授权许可】

Unknown