Microwave absorption studies of MgB2 superconductor

Pramana

V C Sahni¹  R M Kadam²  D K Aswal¹  Shashwati Sen¹  Ajay Singh¹  M K Bhide1²  M D Sastry²  S K Gupta¹  Manmeet Kaur¹ 

[1] Technical Physics and Prototype Engineering Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$;Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$

关键词: MgB2 superconductor;    microwave absorption;    EPR.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Microwave absorption studies have been carried out on MgB2 superconductor using a standard X-band EPR spectrometer. The modulated low-field microwave absorption signals recorded for polycrystalline (grain size ∼ 10𝜇m) samples suggested the absence of weak-link character. The field dependent direct microwave absorption has been found to obey a $sqrt{H}$ dependence with two different slopes, which indicated a transition from strongly pinned lattice to flux flow regime.

【 授权许可】

Unknown