MAGNETIC-PROPERTIES OF POLYCRYSTALLINE R1.5CE0.5SR2CU2NBO10 (R=EU, ND, AND SM) HIGH-T(C) SUPERCONDUCTING CERAMICS

被引：5

作者：

BENNAHMIAS, M

BELLO, AF

BACK, D

RADOUSKY, HB

GOODWIN, TJ

KLAVINS, P

SHELTON, RN

机构：

[1] LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550

[2] UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.48.6525

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic characterization has been performed on the superconducting members of the R1.5Ce0.5Sr2Cu2NBO10 (R = Eu, Nd, and Sm) series. These materials are related to the YBa2Cu3O7-delta structure through the replacement of the CuO chains with NbO2 planes, and the single rare-earth elements with a R2O2 fluorite structure. Measurements of the lower critical-field curve, irreversibility line, volume fraction, Meissner fraction, and magnetic relaxation are reported for each compound. No evidence of intergrain weak-link behavior down to 0.1 Oe is observed. Estimates of the zero-field intragrain critical current density from high-field hysteresis curves taken at 6 K for the Nd-, Sm-, and Eu-based systems are 2.7 x 10(4), 3.3 x 10(4), and 4.7 x 10(4) A/cm2, respectively.

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页码：6525 / 6532

页数：8

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