THE SYNTHESIS, BY TRIETHYLAMMONIUMOXALATE COPRECIPITATION, AND SUPERCONDUCTING PROPERTIES OF Y(BA1-XSRX)2CU4O8

Journal article

Superconductivity has been investigated in the system Y(Ba1-xSrx)2Cu4O8 (0 ≤ x ≤ 0.5). The samples were prepared by triethylammoniaoxalate coprecipitation at ambient oxygen pressure. The superconducting transition temperature, Tc, increased from a value of 85 K (x = 0) to 90 K (x = 0.1 - 0.2) and then decreased to 64 K at x = 0.5. For compositions beyond the solubility limit (x = 0.3), the magnitude of dTc dx was high, ca. 45 K from 0.3 to 0.5. The maximum Tc, 90 K, recorded from samples in the range x = 0.1 ∼ 0.2, were confirmed by magnetization measurements. These results are in contrast to those obtained from the Y(Ba1-xSrx)2Cu3O7 system, in which Tc decreased monotonically from 93 to 82 K for 0 ≤ x ≤ 0.5. © 1991.

Authors: Liu, R; Ho, J; Chang, C; Edwards, P

• Publication status: Published
• Journal: JOURNAL OF SOLID STATE CHEMISTRY
• Volume: 92
• Issue: 1
• Pages: 247-252
• Publication date: 1991-05-01
• DOI: 10.1016/0022-4596(91)90265-J
• EISSN: 1095-726X
• ISSN: 0022-4596
• Language: English