On the superconducting and magnetic properties of HoNbO3-δ and EuNbO3-δ complex oxides

被引：12

作者：

Strukova, GK ^{[1
]}

Shovkun, DV ^{[1
]}

Zverev, VN ^{[1
]}

Batov, IE ^{[1
]}

Zver'kov, SA ^{[1
]}

Khasanov, SS ^{[1
]}

机构：

[1] Inst Solid State Phys, Chernogolovka 1424232, Moscow, Russia

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2001年 / 351卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

superconducting transition; magnetic transition; AC susceptibility;

D O I：

10.1016/S0921-4534(00)01643-9

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Complex oxide compounds of niobium and rare-earth elements, HoNbO3-delta and EuNbO3-delta, have been synthesized, and their magnetic and superconducting properties have been studied. Both these compounds are superconductors with transition temperatures T-c = 15 and 6 K, respectively. The properties of these compounds are strongly affected by the content of oxygen, in particular, T-c drops with this parameter. The compounds are paramagnetic at temperatures higher than T-c. The HoNbO6-delta magnetic susceptibility follows the Curie law, and the effective susceptibility of Ho ions mu (eff) = 9.0. The EuNbO3-delta susceptibility is described by the Curie-Weiss law with the Curie temperature Theta (c) = 4.4 K, and the effective susceptibility of Eu ions mu (eff) = 6.5. The possibility of coexistence of superconductivity and ferromagnetism in EuNbO3-delta is discussed. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：363 / 370

页数：8

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