2005/11/29 by S. Sarangi, Sarangi, S., S. P. Chockalingam +3
Materials Science · Physics and Astronomy · #Alternating current #Amplitude #Condensed matter physics #Crystallite #Decoupling (probability) #FOS: Physical sciences #High-temperature superconductivity #Iron-based superconductors research #Josephson effect #Magnetic field #Materials science #Metallurgy #Optics #Physics #Physics of Superconductivity and Magnetism #Power (physics) #Superconductivity #Superconductivity (cond-mat.supr-con) #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0511703
published in arXiv (Cornell University) (Cornell University) · 10 pages, 5 figures
arxiv created 2005/11/29 · openalex publication_date 2005/11/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
AC losses of granular superconducting MgB2 were measured using non-resonant rf power absorption techniques. The presence of two band-gaps makes the temperature dependent ac loss pattern of MgB2 different from other high Tc superconductors like YBa2Cu3O and BSCCO-2223. Josephson junction decoupling plays a major role in MgB2 polycrystalline samples, both in the presence and absence of magnetic field. We studied the ac loss of MgB2 samples with different crystalline properties, grain sizes and pressures and sintered under different physical and chemical conditions. The effects of frequency and amplitude of ac current on the ac loss are discussed in detail.