Granado, E. ; Huang, Q. ; Lynn, J. W. ; Gopalakrishnan, J. ; Greene, R. L. ; Ramesha, K. (2002) Spin-orbital ordering and mesoscopic phase separation in the double perovskite Ca2FeReO6 Physical Review B, 66 (6). 064409_1-064409_5. ISSN 0163-1829
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Official URL: http://link.aps.org/doi/10.1103/PhysRevB.66.064409
Related URL: http://dx.doi.org/10.1103/PhysRevB.66.064409
Abstract
Neutron powder diffraction measurements on Ca2FeReO6 reveal that this double perovskite orders ferrimagnetically and shows anomalous lattice parameter behavior below TC=521K. Below ~300K and ~160K we observe that the high-T monoclinic crystal structure separates into two and three monoclinic phases, respectively. A magnetic field suppresses the additional phases at low T in favor of the highest-T phase. These manifestations of the orbital degree of freedom of Re 5d electrons indicate that these electrons are strongly correlated and the title compound is a Mott insulator, with competing spin-orbitally ordered states.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 12881 |
| Deposited On: | 11 Nov 2010 08:33 |
| Last Modified: | 02 Jun 2011 10:46 |
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