The effect of Nd<sub>2</sub>BaO<sub>4</sub> addition on the melt-textured Nd-Ba-Cu-O superconductor
In-Gann Chen; Haw-Jer Liu; In-Gann Chen; Department of Materials Science and Engineering, National Cheng Kung University, Tainan, Taiwan 70101, Republic of China; Haw-Jer Liu; Department of Materials Science and Engineering, National Cheng Kung University, Tainan, Taiwan 70101, Republic of China
Журнал:
Superconductor Science and Technology
Дата:
2000-06-01
Аннотация:
Nd-Ba-Cu-O samples with superior T<sub>c</sub> and J<sub>c</sub> can be produced with the process in low oxygen partial pressure, the so-called oxygen-controlled melt-growth (OCMG) method. A previous report indicated that T<sub>c</sub> as high as 88 K can be achieved by processing in air with the addition of Nd<sub>2</sub>BaO<sub>4</sub> (Nd210). However, the J<sub>c</sub>(H,T) data and the effect of amount added on their superconducting properties were not studied in detail. This report reveals a systematic study of the effect of Nd<sub>2</sub>BaO<sub>4</sub> additions as well as the processing oxygen partial pressure on the microstructure evolution and the superconducting properties.
250.1Кб