Addition of Ho2O3 of different types to MgB2 in the ex-situ Spark Plasma Sintering: Simultaneous control of the critical current density at low and high magnetic fields

作者：Aldica G; Popa S; Enculescu M; Batalu D; Miu L; Ferbinteanu M; Badica P^*

来源：Materials Chemistry and Physics, 2014, 146(3): 313-323.

DOI：10.1016/j.matchemphys.2014.03.030

• Superconductors
• Sintering
• Microstructure
• Superconductivity

Two different types of Ho2O3 powders (showing a much different morphology) were added to MgB2 in the ex-situ Spark Plasma Sintering (SPS). In the 5-25 K range, the first Ho2O3 powder type does not significantly suppress the critical current density J(c) at low magnetic fields and the second one enhances it at high fields, while their mixture simultaneously controls J(c) at both small and high magnetic fields so that the decrease is small at low fields and there is a notable enhancement at high fields when compared to pristine sample. The

• 出版日期2014-8-14