Multiferroic behavior in the new double-perovskite Lu${}_2$MnCoO${}_6$

Abstract

We present a new member of the multiferroic oxides, Lu${}_2$MnCoO${}_6$, which we have investigated using X-ray diffraction, neutron diffraction, specific heat, magnetization, electric polarization, and dielectric constant measurements. This material possesses an electric polarization strongly coupled to a net magnetization below 35 K, despite the antiferromagnetic ordering of the $S=3/2$ Mn${}^{4+}$ and Co${}^{2+}$ spins in an $\uparrow \uparrow \downarrow \downarrow$ configuration along the c-direction. We discuss the magnetic order in terms of a condensation of domain boundaries between $\uparrow \uparrow$ and $\downarrow \downarrow$ ferromagnetic domains, with each domain boundary producing a net electric polarization due to spatial inversion symmetry breaking. In an applied magnetic field the domain boundaries slide, controlling the size of the net magnetization, electric polarization, and magnetoelectric coupling.

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Cited by in corpus (37)

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• Understanding the Magnetic Puzzles of Double Perovskites A2FeOsO6 (A=Ca, Sr)
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• Magnetic properties of double perovskite $L{n}_2$CoIrO${}_6$ ($Ln$ = Eu, Tb, Ho): hetero-tri-spin $3d$-$5d$-$4f$ systems
• Giant Exchange Bias in the Single-layered Ruddlesden-Popper Perovskite SrLaCo0.5Mn0.5O4
• Ferroelectricity induced by ferriaxial crystal rotation and spin helicity in a B-site-ordered double-perovskite multiferroic In2NiMnO6
• The ferroelectric polarization of Y2CoMnO6 aligns along the b-axis: the first-principles calculations
• Multiferroicity with coexisting isotropic and anisotropic spins in Ca${}_3$Co${}_{2-x}$Mn${}_x$O${}_6$
• Spin reorientation and disordered rare earth magnetism in Ho${}_2$FeCoO${}_6$
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• Magnetodielectric coupling and multi-blocking effect in the Ising-chain magnet Sr2Ca2CoMn2O9
• Structural transition, spontaneous formation of strong singlet dimers and metamagnetism in $S=3/2$ magnetoelastic spin chains