Effect of platinum addition on the microstructure and critical current density in (Nd, Eu, Gd)-Ba-Cu-O
作者： M Muralidhar , M R Koblischka , M Murakami
DOI: 10.1088/0953-2048/12/2/009
关键词: Superconductivity 、 Platinum 、 Phase (matter) 、 Particle size 、 Analytical chemistry 、 Critical current 、 Microstructure 、 Scanning electron microscope 、 Materials science 、 Magnetic susceptibility
摘要: We have studied the microstructure and magnetic properties of oxygen-controlled-melt-growth (OCMG) processed (Nd, Eu, Gd)-Ba-Cu-O superconductors, which contain about 40 mol% (NEG211) second phase by varying amount Pt from 0.25 to 3 mol%. Scanning electron transmission microscopic observations demonstrate that 0.5 is optimum quantity refine 211 particles, leading a dramatic increase in critical current density. An addition 2-3 results formation relatively large NEG211 particles. values with increasing content up then decrease thereafter. A high density 70 000 at T = 77 K an applied field 2.2 ( axis) achieved sample Pt. Our refinement particle size thus for enhancement
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