Neutron scattering study of magnetic excitations in a 5d-based double-perovskite Ba2FeReO6

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Title
Neutron scattering study of magnetic excitations in a 5d-based double-perovskite Ba2FeReO6
Author(s)
Plumb, K.W.; Cook, A.M.; Clancy, J.P.; Kolesnikov, A.I.; Byung Chul Jeon; Tae Won Noh; Paramekanti, A.; Young-June Kim
Publication Date
2013-05
Journal
PHYSICAL REVIEW B, v.87, no.18, pp.184412-1 - 184412-7
Publisher
AMER PHYSICAL SOC
Abstract
Motivated by exploring spin-orbit-coupled magnetism in 5d-based transition metal oxides (TMOs) beyond the iridates, we present a powder inelastic neutron scattering study of magnetic excitations in Ba2FeReO6-a member of the double-perovskite family of materials which exhibit half-metallic behavior and high Curie temperatures T-c. We find clear evidence of two well-defined dispersing magnetic modes in its low-temperature ferrimagnetic state. We develop a local moment model, which incorporates the interaction of Fe spins with spin-orbital locked magnetic moments on Re and show that it captures our experimental observations. This allows us to extract moment sizes and exchange couplings, explain the magnitude of T-c, and infer that magnetostructural locking terms are weak. Our study further opens up Re-based compounds as model systems to explore the interplay of strong correlations and spin-orbit coupling in 5d TMOs.
URI
https://pr.ibs.re.kr/handle/8788114/1333
ISSN
2469-9950
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Files in This Item:
2013-05-10-Physical Review B-Condensed Matter and Materials Physics.pdfDownload

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