Granado, E and Huang, Q and Lynn, JW and Gopalakrishnan, J and Greene, RL and Ramesha, K (2002) Spin-orbital ordering and mesoscopic phase separation in the double perovskite Ca2FeReO6. In: Physical Review B: Condensed Matter and Materials Physics, 66 (6). 064409.
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Neutron powder diffraction measurements on Ca2FeReO6 reveal that this double perovskite orders ferrimagnetically and shows anomalous lattice parameter behavior below T-C=521 K. Below similar to300 K and similar to160 K 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:||Journal Article|
|Additional Information:||Copyright of this article belongs to The American Physical Society.|
|Department/Centre:||Division of Chemical Sciences > Solid State & Structural Chemistry Unit|
|Date Deposited:||28 Jul 2011 06:43|
|Last Modified:||28 Jul 2011 06:43|
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