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Spin-orbital ordering and mesoscopic phase separation in the double perovskite Ca2FeReO6

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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Official URL: http://prb.aps.org/abstract/PRB/v66/i6/e064409


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
Depositing User: Ms V Mangala
Date Deposited: 28 Jul 2011 06:43
Last Modified: 28 Jul 2011 06:43
URI: http://eprints.iisc.ac.in/id/eprint/39407

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