Direct observations of pseudo-binary NdBa2Cu3Ox-Ba3Cu10O13 phase diagram and NdBa2Cu3Ox crystallization under reduced oxygen atmosphere

被引：7

作者：

Aswal, DK ^{[1
]}

Shinmuar, M ^{[1
]}

Hayakawa, Y ^{[1
]}

Kumagawa, M ^{[1
]}

机构：

[1] Shizuoka Univ, Elect Res Inst, Hamamatsu, Shizuoka 4328011, Japan

来源：

JOURNAL OF CRYSTAL GROWTH | 1999年 / 200卷 / 3-4期

基金：

日本学术振兴会;

关键词：

phase diagram; crystallization; high temperature optical microscopy; Ba3Cu10O13; NdBa2Cu3Ox;

D O I：

10.1016/S0022-0248(99)00043-3

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The pseudo-binary NdBa2Cu3Ox-Ba3Cu10O13 phase diagrams and the crystallization of NdBa2Cu3Ox have been in situ observed using high-temperature optical microscope under three different oxygen atmospheres namely 1%, 0.1% and 0.0097% oxygen in argon. It has been observed that the liquidus line becomes narrower both in composition and temperature with decreasing oxygen pressure. This result suggested that under reduced oxygen atmosphere, the NdBa2Cu3Ox crystals could only be grown from a peritectic melt consisting of Nd4Ba2Cu2O10 and liquid. The crystallization temperature of NdBa2Cu3Ox was found to decrease logarithmically with decreasing oxygen content in the atmosphere. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：427 / 434

页数：8

共 15 条

[1] In situ measurement of the growth rate of YBa2Cu3Ox single crystals [J].

Aswal, DK ;

Shinmura, M ;

Hayakawa, Y ;

Kumagawa, M .

JOURNAL OF CRYSTAL GROWTH, 1999, 197 (1-2) :379-382

[2] In situ observation of melting/dissolution, nucleation and growth of NdBa2Cu3Ox by high temperature optical microscopy [J].

Aswal, DK ;

Shinmura, M ;

Hayakawa, Y ;

Kumagawa, M .

JOURNAL OF CRYSTAL GROWTH, 1998, 193 (1-2) :61-70

[3]

ASWAL DK, UNPUB J INORGANIC MA

[4]

ASWAL DK, IN PRESS STUDIES HIG, V29

[5]

ASWAL DK, IN PRESS ADV SUPERCO, V11

[6] CRYSTAL-STRUCTURE OF THE SUPERCONDUCTOR BA1.8ND1.2CU3O7-Y [J].

IZUMI, F ;

TAKEKAWA, S ;

MATSUI, Y ;

IYI, N ;

ASANO, H ;

ISHIGAKI, T ;

WATANABE, N .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1987, 26 (10) :L1616-L1619

[7] Phase diagrams in the solid solution Nd-Ba-Cu-O system and NdBa2Cu3O7-δ single crystals growth by the traveling-solvent floating-zone method [J].

Kuroda, K ;

Itoi, K ;

Okano, J ;

Segawa, S ;

Abe, K ;

Choi, IH ;

Unoki, H ;

Koshizuka, N .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1997, 36 (11) :6730-6736

[8] NONSTOICHIOMETRY AND DECOMPOSITION OF LA1+ZBA2-ZCU3OY AND LA4BACU5O13-W [J].

LINDEMER, TB ;

SPECHT, ED ;

MACDOUGALL, CS ;

TAYLOR, GM ;

PYE, SL .

PHYSICA C, 1993, 216 (1-2) :99-110

[9] Melt-processed light rare earth element-Ba-Cu-O [J].

Murakami, M ;

Sakai, N ;

Higuchi, T ;

Yoo, SI .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1996, 9 (12) :1015-1032

[10] Effect of oxygen partial pressure on the neodymium solubility in Ba-Cu-O solvent [J].

Nakamura, M ;

Kambara, M ;

Umeda, T ;

Shiohara, Y .

PHYSICA C, 1996, 266 (3-4) :178-182

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