STRUCTURAL AND PHYSICAL CHARACTERIZATION OF NDNIO3 SYNTHESIZED BY A SOL-GEL METHOD

被引：9

作者：

BLASCO, J ^{[1
]}

GARCIA, J ^{[1
]}

PROIETTI, MG ^{[1
]}

CHABOY, J ^{[1
]}

机构：

[1] INFN,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY

来源：

SOLID STATE IONICS | 1993年 / 63-5卷

关键词：

D O I：

10.1016/0167-2738(93)90163-W

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

NdNiO3-x has been synthesized at low oxygen pressure using a sol-gel process. This method gives an oxygen deficient phase with a value of x around 0.1 as determined by thermogravimetric analysis. X-ray diffraction powder data and Ni K-edge EXAFS measurements show that this compound belongs to the orthorhombic crystalline system and not to the rhombohedral one as it has been reported elsewhere. Different sintering processes give samples with different grain sizes that show similar magnetic and electrical behaviour. All these samples have a strong metal-insulator transition at 210 K and their resistivity curves show a large thermal hysteresis that could be related to the lack of oxygen stoichiometry. No contribution of magnetic Ni ion have been deduced from the magnetic susceptibility measurements. Moreover, no magnetic anomaly has been detected at the metal-semiconductor phase transition.

引用

页码：585 / 592

页数：8

共 12 条

[1] SERIES OF OXIDIZED TRIVALENT NICKEL COMPOUNDS DERIVED FROM PEROVSKITE [J].