Dynamic Ferrimagnetic Order in a Highly Distorted Double Perovskite Y2CoRuO6

Y2CoRuO6 was synthesized as a B-site ordered double perovskite with distorted monoclinic P21 /n symmetry and an average tilting of the CoO6 and RuO6 octahedra of ψ̅ = 19.7°. DC magnetization measurements show a ferrimagnetic transition at around 82 K. Although long-range ferrimagntic order is suppor...

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Bibliographic Details
Published in:Chemistry of materials 2018-10, Vol.30 (20), p.7047-7054
Main Authors: Deng, Zheng, Retuerto, Maria, Liu, Sizhan, Croft, Mark, Stephens, Peter W, Calder, Stuart, Li, Wenmin, Chen, Bijuan, Jin, Changqing, Hu, Zhiwei, Li, Man-Rong, Lin, Hong-Ji, Chan, Ting-Shan, Chen, Chien-Te, Kim, Sun Woo, Greenblatt, Martha
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Language:English
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Summary:Y2CoRuO6 was synthesized as a B-site ordered double perovskite with distorted monoclinic P21 /n symmetry and an average tilting of the CoO6 and RuO6 octahedra of ψ̅ = 19.7°. DC magnetization measurements show a ferrimagnetic transition at around 82 K. Although long-range ferrimagntic order is supported by neutron diffraction studies, aging phenomena in time-dependent isothermal magnetization, frequency dependence of AC susceptibility, and a smeared peak in the specific heat together reveal spin glass-like dynamics. The magnetic subtleties resemble chaotic behavior as previously observed in some ferro- or ferrimagnetic materials that exhibit spin glass-like dynamics. It is argued that the magnetic dynamics in Y2Co­RuO6 mainly stem from competition between antiferromagnetic Co↑-O-(Ru)-O-Co↓/​Ru↑-O-(Co)-O-Ru↓ and antiferromagnetic Co↑-O-Ru↓ interactions, besides a degree of Co:Ru antisite disorder. Herein, the B-site ordered Y2Co­RuO6 offers a model to explore the intriguing dynamics in correlated 3d–4d transition metal double perovskites.
ISSN:0897-4756
1520-5002
DOI:10.1021/acs.chemmater.8b02728