CHARACTERIZATION OF OXYGEN-DEFICIENT PHASES APPEARING IN REDUCTION OF THE PEROVSKITE-TYPE LANIO3 TO LA2NI2O5

被引：48

作者：

MORIGA, T

USAKA, O

NAKABAYASHI, I

KINOUCHI, T

KIKKAWA, S

KANAMARU, F

机构：

[1] UNIV TOKUSHIMA,FAC INTEGRATED ARTS & SCI,TOKUSHIMA 770,JAPAN

[2] OSAKA UNIV,INST SCI & IND RES,IBARAKI,OSAKA 567,JAPAN

来源：

SOLID STATE IONICS | 1995年 / 79卷

关键词：

PEROVSKITE; TOPOTACTIC INTERCALATION DEINTERCALATION; LANTHANUM NICKEL TRIOXIDE;

D O I：

10.1016/0167-2738(95)00070-M

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：

Topotactic vacuum reduction of the perovskite-type LaNiO3 was performed with aluminum metal powder as a reducing agent. An orthorhombic single phase of oxygen-deficient LaNiO2.5+x (0.1 less than or equal to x less than or equal to 0.15) was successfully prepared. LaNiO3-z (z less than or equal to 0.25) with the rhombohedral perovskite-type structure showed metallic conductivity and Pauli paramagnetism, whereas the oxygen-deficient phase LaNiO2.60 was semiconductive and was considered to be ferromagnetic below 230 K. The effective magnetic moment of LaNiO2.60 was 1.7 mu B, which suggests that LaNiO2.60 is composed of octahedrally-coordinated Ni3+ ions and square-planarly-coordinated Ni+ ions, as seen in La2Ni2O5.

引用

页码：252 / 255

页数：4

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