Abstract
We used dc magnetization and transport measurement to estimate the superconducting critical current densities ( J c) of polycrystalline MgB 2 sintered under high temperature and high pressure. We measured the current–voltage ( I–V) characteristics and found the existence of a vortex-glass phase in the field–temperature ( H–T) plane. This is notable in that the vortex-glass phase can be observed even in a polycrystalline specimen, which suggests that the supercurrent is not sensitive to the grain boundaries. Moreover, the transport (intergrain) J c seems to be comparable to a magnetic (intragrain) J c.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
