Incipient Orbital Order in Half-Metallic $Ba_2FeReO_6$

Azimonte, C and Cezar, JC and Granado, E and Huang, Q and Lynn, JW and Campoy, JCP and Gopalakrishnan, J and Ramesha, K (2007) Incipient Orbital Order in Half-Metallic $Ba_2FeReO_6$. In: Physical Review Letters, 98 (1). 017204-1-017204-4.

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Abstract

Largely unquenched Re 5d orbital magnetic moments in half-metallic $Ba_2FeReO_6$ drive a symmetry lowering transition from a cubic paramagnet to a compressed tetragonal (c/a < 1) ferrimagnet below TC\sim 305 K, with a giant linear magnetoelastic constant and the spins lying spontaneously along the unique tetragonal axis. The large orbital magnetization and degree of structural deformation indicate proximity to a metal-insulator transition. These results point to an incipient orbitally ordered state in the metallic ferrimagnetic phase.

Item Type:	Journal Article
Publication:	Physical Review Letters
Publisher:	The American Physical Society
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:	14 Mar 2007
Last Modified:	19 Sep 2010 04:34
URI:	http://eprints.iisc.ac.in/id/eprint/9706

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