A novel ferrimagnetic irido-cuprate: IrSr{sub 2}GdCu{sub 2}O{sub 8}
- Laboratorio de Quimica del Estado Solido, Departamento de Quimica Inorganica, and Laboratorio Complutense de Altas presiones, Facultad de Quimica, Universidad Complutense, EU 28040 Madrid (Spain)
We have performed an investigation of the structural, microstructural and magnetic properties of the new compound IrSr{sub 2}GdCu{sub 2}O{sub 8}. The sample was prepared under high temperature ({approx}1393K) and high-pressure conditions ({approx}60Kbars) 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{sub p}xa{sub p}x3a{sub p} which is supported by XRD, through a 'diagonal' one, {approx}2a{sub p}x2a{sub p}x3a{sub p} as seen by SAED, to a microdomain texture of this last one cell supported by HREM. A ferrimagnetic Ir{sup IV}-Gd{sup III} spin ordering is observed below 15K. The iridium oxidation state seems to be +4.
- OSTI ID:
- 20784987
- Journal Information:
- Journal of Solid State Chemistry, Vol. 179, Issue 5; Other Information: DOI: 10.1016/j.jssc.2005.12.038; PII: S0022-4596(05)00641-9; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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