2001/04/29 by M. I. Tsindlekht, Tsindlekht, M. I., I. Felner +1
Physics and Astronomy · #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0104565
arxiv created 2001/04/29 · openalex publication_date 2001/04/29 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report the experimental study of linear and nonlinear ac properties of two types of samples of MgB2 prepared by different technologies. A commercial sample (Alfa Aesar) demonstrates two stages of a broad phase transition, whereas home-made metallic sample have one sharp transition. The temperature dependence of the rectified signal shows two peaks for the commercial and one peak for the metallic samples. Two types of weak links (intergrain and intragrain) are responsible for the nonlinear response of these samples. The properties of these weak links are discussed.