The crystal structures and magnetic properties of Ba2LaRuO6 and Ca2LaRuO6 |
| |
Authors: | P.D. Battle J.B. Goodenough R. Price |
| |
Affiliation: | Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, England |
| |
Abstract: | Profile analysis of high-resolution, powder neutron-diffraction data was used to refine the previously reported structures of the ordered, distorted perovskites Ba2LaRuO6 and Ca2LaRuO6. Low-temperature neutron diffraction experiments showed that, at 2K, the former is a Type IIIa antiferromagnet while the latter is Type I. Both compounds have an ordered magnetic moment of per Ru5+ ion. The Néel temperature of Ba2LaRuO6 was determined to be 29.5K, and the covalent mixing between the ruthenium and nearest-neighbor anions is described by A2π = 8.2 ± 1% for Ba2LaRuO6 and 8.6 ± 1% for Ca2LaRuO6. The ionic radius of a Ru5+ ion is 0.56 Å. These data are consistently interpreted within the framework of a strongly correlated, half-filled π1 band. Extension of this interpretation to the magnetic data for the perovskites CaRuO3 and SrRuO3 leads to a fundamental theoretical prediction. |
| |
Keywords: | Author to whom correspondence should be addressed. |
本文献已被 ScienceDirect 等数据库收录! |
|