High-temperature in situ observation of Nd–Sm–Ba–Cu–O system by laser-scanning microscopy

• Published in: Physica. C, Superconductivity Vol. 357; pp. 702 - 705
• Main Authors: Banzai, S., Sakai, N., Takazawa, N., Yoshizawa, S., Osabe, G., Otsuka, M., Murakami, M.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2001
• Subjects: In situ observation; Mixing RE elements; Neodymium; Phase diagram; Samarium; 74.72; Neodymium; 74.70; Mixing RE elements; Phase diagram; 74.25.D; In situ observation; Samarium
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/S0921-4534(01)00321-5

We have studied the quasi-binary phase diagrams of RE–Ba–Cu–O systems, in which rare earth (RE) site is composed of Nd, Sm and its mixture, along the line connecting RE123 and Ba
3Cu
5O
y
(035) in 1% O
2 and 21% O
2 in Ar. The nucleation and melting of REBa
2Cu
3O
y
and RE
2BaCuO
5/RE
4Ba
2Cu
2O
10 were observed in situ and the liquidus lines were determined using a laser-scanning microscope. Phase identification was performed on the samples quenched from high temperatures through X-ray powder diffraction measurements and electron probe microanalysis.