Melt processing and high performance of binary (Nd, Sm)-Ba-Cu-O superconductors

被引：15

作者：

Hu, A

Schätzle, P

Bieger, W

Verges, P

Fuchs, G

Krabbes, G

机构：

[1] Inst Festkorper, D-01171 Dresden, Germany

[2] Werkstofforsch Dresden, D-01171 Dresden, Germany

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1999年 / 12卷 / 05期

关键词：

D O I：

10.1088/0953-2048/12/5/310

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Binary (Nd, Sm)-Ba-Cu-O superconductors with T-c of 96 K and a high irreversibility field up to 8 T have been fabricated in air via a newly developed technique. The initial composition was controlled by using binary (Nd, Sm)(2)BaO4 as an addition. In comparison with both NdBaCuO and YBaCuO melt-textured superconductors, the present composition showed a remarkable enhancement of critical current densities in an intermediate field regime (1-3 T). Microstructural observations and compositional analysis showed that the distributions of Nd and Sm in the (Nd, Sm)-123 matrix were homogeneous while the atomic ratio between these two rare earth elements was inconsistent with that in the nominal composition. These new characteristics were thought to cohere with the different solubilities between Nd and Sm in the liquid phase. Finally, trapped magnetic field mapping showed a single-domain shape of the trapped held, which indicated the growth of a single grain in the samples.

引用

收藏

页码：301 / 307

页数：7

相关论文

共 27 条

[1] Modified processing, microstructure and improved properties of NdBaCuO bulk materials [J].

Bieger, W ;

Krabbes, G ;

Schatzle, P ;

Leistikow, A ;

Thomas, J ;

Verges, P .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 1998, 53 (1-2) :100-103

[2] Effect of high-temperature heat-treatment on the pinning properties of melt-textured Nd123 [J].

Chikumoto, N ;

Yoshioka, J ;

Otsuka, M ;

Hayashi, N ;

Murakami, M .

PHYSICA C, 1997, 281 (2-3) :253-259

[3] HIGH CRITICAL-CURRENT DENSITY OF ND(BA,ND)(2)CU3O7-DELTA SINGLE-CRYSTALS [J].

EGI, T ;

WEN, JG ;

KURODA, K ;

UNOKI, H ;

KOSHIZUKA, N .

APPLIED PHYSICS LETTERS, 1995, 67 (16) :2406-2408

[4] ANISOTROPIC CRITICAL CURRENTS IN BA2YCU3O7 ANALYZED USING AN EXTENDED BEAN MODEL [J].

GYORGY, EM ;

VANDOVER, RB ;

JACKSON, KA ;

SCHNEEMEYER, LF ;

WASZCZAK, JV .

APPLIED PHYSICS LETTERS, 1989, 55 (03) :283-285

[5] Periodic fluctuation of Ba/Nd ratio in single crystals of high-J(c) NdBa2Cu3O7-delta superconductor [J].

Hirayama, T ;

Ikuhara, Y ;

Nakamura, M ;

Yamada, Y ;

Shiohara, Y .

JOURNAL OF MATERIALS RESEARCH, 1997, 12 (02) :293-295

[6] Fabrication of melt-textured Nd123 superconductors with Nd2BaO4 addition [J].

Hu, A ;

Obradors, X ;

Gomis, V ;

Puig, T ;

Carrillo, A ;

Cardellach, E ;

Mendoza, E ;

Zhao, ZX ;

Xiong, JW .

APPLIED SUPERCONDUCTIVITY, 1998, 6 (2-5) :129-137

[7] Superconducting properties of melt-textured Nd1+xBa2-xCu3Oy prepared in air [J].

Hu, AM ;

Zhao, ZX ;

Wu, MZ ;

Wende, C ;

Strasser, T ;

Jung, B ;

Bruchlos, G ;

Gawalek, W ;

Goernert, P .

PHYSICA C, 1997, 278 (1-2) :43-48

[8] Melt-processed Sm-Ba-Cu-O superconductors trapping strong magnetic field [J].

Ikuta, H ;

Mase, A ;

Yanagi, Y ;

Yoshikawa, M ;

Itoh, Y ;

Oka, T ;

Mizutani, U .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1998, 11 (11) :1345-1347

[9] Improved HTSC bulk materials: a thermodynamic approach to processing [J].

Krabbes, G ;

Bieger, W ;

Schatzle, P ;

Wiesner, U .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1998, 11 (01) :144-148

[10] MELT-TEXTURED GROWTH AND CHARACTERIZATION OF A (ND/Y)BA2CU3O7-DELTA COMPOSITE SUPERCONDUCTOR WITH VERY HIGH CRITICAL-CURRENT DENSITY [J].

MATTHEWS, DN ;

COCHRANE, JW ;

RUSSELL, GJ .

PHYSICA C, 1995, 249 (3-4) :255-261