Influence of oxygen doping on critical fields in MgB2 bulk superconductors
Loading...
Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
IOP Publishing Ltd
Abstract
In this work we studied the influence of SnO2 doping on the critical fields and temperatures
of MgB2 bulk samples. Bulk samples were made by mixing ex-situ MgB2 powder with 5 wt% SnO2
powder and then pressing the mixed powders into pellets using a pressure of 2000 psi. The bulk
pellets were sintered at 900⁰C in a furnace under flowing Ar. The samples were quenched to room
temperature after dwelling at 900⁰C for 5h. XRD, SEM, and magnetic measurements were made on
doped and control samples. XRD showed a decomposition of the SnO2 and very slight reductions in
the a-axis and c-axis lattice parameters of theMgB2 phase. M-T (Magnetization-Temperature) curves
showed a decrease in Bc2 of approximately 1 T in the temperature range of 24 K - 39 K with SnO2
additions as compared to the control samples.
Description
Keywords
Citation
D. Zhang et. al. 2017 IOP Conf. Ser.: Mater. Sci. Eng. 279 012025. https://doi.org/10.1088/1757-899X/279/1/012025