Magnetism in Re-based ferrimagnetic double perovskites

Abstract

We have investigated spin and orbital magnetic moments of the Re 5d ion in the double perovskites A2FeReO6 (A = Ba, Sr, Ca) by X-ray magnetic circular dichroism (XMCD) at the Re L(2,3) edges. In these ferrimagnetic compounds an unusually large negative spin and positive orbital magnetic moment at the Re atoms was detected. The presence of a finite spin magnetic moment in a 'non-magnetic' double perovskite as observed in the double perovskite Sr2ScReO6 proves that Re has also a small, but finite intrinsic magnetic moment. We further show for the examples of Ba and Ca that the usually neglected alkaline earth ions undoubtedly also contribute to the magnetism in the ferrimagnetic double perovskites.

References in corpus (13)

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• Strong ferromangnetism and weak antiferroamgnetism in double perovskites: Sr${}_2$Fe{/it M}O${}_6$ ({/it M}=Mo, W and Re)
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• Properties of the ferrimagnetic double-perovskite A_{2}FeReO_{6} (A=Ba and Ca)
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• Theory of Transition Temperature of Magnetic Double Perovskites
• Direct evidence of the orbital contribution to the magnetic moment in AA'FeReO6 double perovskites
• Magnetic moments of W 5d in Ca2CrWO6 and Sr2CrWO6 double perovskites
• Strong correlation effects of the Re 5$d$ electrons on the metal-insulator transition in Ca${}_2$FeReO${}_6$
• Comment on "Systematics of the Induced Magnetic Moments in 5d Layers and the Violation of the Third Hund's Rule"

Cited by in corpus (8)

• Origin of Magnetism and trend in $T_c$ in Cr-based double perovskites: Interplay of two driving mechanisms
• Double perovskite heterostructures: Magnetism, Chern bands, and Chern insulators
• Magnetism and spin-orbit coupling in Ir-based double perovskites La${}_{(}2-x$Sr${}_x$CoIrO${}_6$
• Spin-orbit coupling controlled ground state in Sr${}_2$ScOsO${}_6$
• Structural and metal-insulator transitions in rhenium based double perovskites via orbital ordering
• Spin-orbital locked magnetic excitations in a half-metallic double perovskite Ba2FeReO6
• Theory of metallic double perovskites with spin orbit coupling and strong correlations; application to ferrimagnetic Ba2FeReO6
• Re-t2g-splitting-driven semiconductor gaps in ferrimagnetic double perovskite Ca2MReO6 (M=Cr,Fe) from first principles