"CaCu2O3" - A nonstoichiometric compound: Structural disorder and magnetic properties
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
In the compounds MgCu2O3 and CaCu2O3 the Cu and O atoms are connected topologically in the same way as in the fascinating spin-ladder compound SrCu2O3. In contrast to the latter, the Cu-O-Cu bonding angle corresponding to the "rungs" is significantly less than 180° in MgCu2O3 and CaCu2O3. As a consequence, the magnetic susceptibility is quite different compared with that of SrCu2O3. Single-phase samples of CaCu2O3 revealed a deficiency of Ca, a balancing excess in Cu, and an oxygen deficiency corresponding to Ca1-xCu2+xO3-δ. The excess Cu atoms, which are located near the Ca sites, are in the 3d10 state. The deficiency of oxygen causes a Curie term in the magnetic susceptibility due to the interruption of Cu-O-Cu bonds. From the overall behavior of the susceptibility an antiferromagnetic or dering at a Néel temperature of about 27 K is concluded.
Details
Originalsprache | Englisch |
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Seiten (von - bis) | 1995-2002 |
Seitenumfang | 8 |
Fachzeitschrift | Materials research bulletin |
Jahrgang | 36 |
Ausgabenummer | 11 |
Publikationsstatus | Veröffentlicht - 15 Sept. 2001 |
Peer-Review-Status | Ja |
Externe IDs
ORCID | /0000-0002-2391-6025/work/166325880 |
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Schlagworte
ASJC Scopus Sachgebiete
Schlagwörter
- A. oxides, B. crystal growth, C. X-ray diffraction, D. crystal structure, D. magnetic properties