Abstract
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% of (Nd, Eu, Gd)2BaCuO5 (NEG211) second phase by varying the amount of Pt from 0.25 to 3 mol%. Scanning electron and transmission electron microscopic observations demonstrate that 0.5 mol% Pt is the optimum quantity to refine the 211 particles, leading to a dramatic increase in the critical current density. An addition of 2-3 mol% Pt results in the formation of relatively large NEG211 particles. Jc values increase with increasing Pt content up to 0.5 mol% and then decrease thereafter. A high critical current density of 70 000 A cm-2 at T = 77 K and an applied field of 2.2 T (H ∥ c axis) is achieved in the sample with 0.5 mol% Pt. Our results demonstrate that the Pt addition is critical to the refinement of the 211 particle size and thus for the enhancement of the critical current density.
| Original language | English |
|---|---|
| Pages (from-to) | 105-109 |
| Number of pages | 5 |
| Journal | Superconductor Science and Technology |
| Volume | 12 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1999 Feb |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Effect of platinum addition on the microstructure and critical current density in (Nd, Eu, Gd)-Ba-Cu-O. / Miryala, Muralidhar; Koblischka, Michael Rudolf; Murakami, Masato.
In: Superconductor Science and Technology, Vol. 12, No. 2, 02.1999, p. 105-109.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of platinum addition on the microstructure and critical current density in (Nd, Eu, Gd)-Ba-Cu-O
AU - Miryala, Muralidhar
AU - Koblischka, Michael Rudolf
AU - Murakami, Masato
PY - 1999/2
Y1 - 1999/2
N2 - 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% of (Nd, Eu, Gd)2BaCuO5 (NEG211) second phase by varying the amount of Pt from 0.25 to 3 mol%. Scanning electron and transmission electron microscopic observations demonstrate that 0.5 mol% Pt is the optimum quantity to refine the 211 particles, leading to a dramatic increase in the critical current density. An addition of 2-3 mol% Pt results in the formation of relatively large NEG211 particles. Jc values increase with increasing Pt content up to 0.5 mol% and then decrease thereafter. A high critical current density of 70 000 A cm-2 at T = 77 K and an applied field of 2.2 T (H ∥ c axis) is achieved in the sample with 0.5 mol% Pt. Our results demonstrate that the Pt addition is critical to the refinement of the 211 particle size and thus for the enhancement of the critical current density.
AB - 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% of (Nd, Eu, Gd)2BaCuO5 (NEG211) second phase by varying the amount of Pt from 0.25 to 3 mol%. Scanning electron and transmission electron microscopic observations demonstrate that 0.5 mol% Pt is the optimum quantity to refine the 211 particles, leading to a dramatic increase in the critical current density. An addition of 2-3 mol% Pt results in the formation of relatively large NEG211 particles. Jc values increase with increasing Pt content up to 0.5 mol% and then decrease thereafter. A high critical current density of 70 000 A cm-2 at T = 77 K and an applied field of 2.2 T (H ∥ c axis) is achieved in the sample with 0.5 mol% Pt. Our results demonstrate that the Pt addition is critical to the refinement of the 211 particle size and thus for the enhancement of the critical current density.
UR - http://www.scopus.com/inward/record.url?scp=0033076987&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033076987&partnerID=8YFLogxK
U2 - 10.1088/0953-2048/12/2/009
DO - 10.1088/0953-2048/12/2/009
M3 - Article
AN - SCOPUS:0033076987
VL - 12
SP - 105
EP - 109
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
SN - 0953-2048
IS - 2
ER -