A novel ferrimagnetic irido-cuprate:: IrSr2GdCu2O8

被引：17

作者：

Dos Santos-Garcia, A. J.

Aguirre, Myriam H.

Moran, E.

Puche, R. Saez

Alario-Franco, M. A. ^{[1
]}

机构：

[1] Univ Complutense, Dept Quim Inorgan, Lab Quim Estado Solido, E-28040 Madrid, Spain

[2] Univ Complutense, Fac Quim, Lab Complutense Altas Pres, E-28040 Madrid, Spain

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2006年 / 179卷 / 05期

关键词：

irido-cuprate; high pressure synthesis; ferrimagnetism; crystal structure; microstructure;

D O I：

10.1016/j.jssc.2005.12.038

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We have performed all investigation of the structural, microstructural and magnetic properties of the new compound IrSr2GdCu2O8. The sample was prepared under high temperature (similar to 1393 K) and high-pressure conditions (similar to 60 Kbars) in a Belt type apparatus. X-ray diffraction (XRD) analysis shows that this irido-cuprate is isostructural with the corresponding Ru-1212 phase. Structurally, this material shows an interesting hierarchy of ordering phenomena, whose observation actually depends on the technique used to analyze the material: from a "simple" cell a(p) x a(p) x 3a(p) which is supported by XRD, through a "diagonal" one, similar to root 2a(p) x root 2a(p) x 3a(p) as seen by SAED, to a microdomain texture of this last one cell supported by HREM. A ferrimagnetic Ir-IV-Gd-III spin ordering is observed below 15 K. The iridium oxidation state seems to be + 4. (C) 2006 Elsevier Inc. All rights reserved.

引用

页码：1296 / 1302

页数：7

共 44 条

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