Electric polarization observed in single crystals of multiferroic Lu2MnCoO6

Abstract

We report electric polarization and magnetization measurements in single crystals of double perovskite Lu2MnCoO6 using pulsed magnetic fields and optical second harmonic generation (SHG) in DC magnetic fields. we observe well-resolved magnetic field-induced changes in the electric polarization in single crystals and thereby resolve the question about whether multiferroic behavior is intrinsic to these materials or an extrinsic feature of polycrystals. We find electric polarization along the crystalline b-axis, that is suppressed by applying a magnetic fields along c-axis and advance a model for the origin of magnetoelectric coupling. We furthermore map the phase diagram using both capacitance and electric polarization to identify regions of ordering and regions of magnetoelectric hysteresis. This compound is a rare example of coupled hysteretic behavior in the magnetic and electric properties. The ferromagnetic-like magnetic hysteresis loop that couples to hysteretic polarization can be attributed not to ordinary ferromagnetic domains, but to the rich physics of magnetic frustration of Ising-like spins in the axial next-nearest neighbor interaction model.

arXiv comment5 pages, 5 figures

References in corpus (8)

• Multiferroics: different ways to combine magnetism and ferroelectricity
• Multiferroic behavior in the new double-perovskite Lu${}_2$MnCoO${}_6$
• 3:1 magnetization plateau and suppression of ferroelectric polarization in an Ising chain multiferroic
• Strong ferromagnetic-dielectric coupling in multiferroic Lu2CoMnO6 single crystals
• Magnetoelectric effects in an organo-metallic quantum magnet
• Magnetically-induced electric polarization in an organo-metallic magnet
• Multiferroicity with coexisting isotropic and anisotropic spins in Ca${}_3$Co${}_{2-x}$Mn${}_x$O${}_6$
• Multiferroic behavior in trimerized Mott insulators

Cited by in corpus (8)

• Anisotropic magnetic properties and giant rotating magnetocaloric effect in double-perovskite Tb2CoMnO6
• Strong magnetoelectric coupling in mixed ferrimagnetic-multiferroic phases of a double perovskite
• Topological solitons and bulk polarization switch in collinear type II multiferroics
• Simple microscopic model for magneto-electric coupling in type-II antiferromagnetic multiferroics
• Evidence for the Alternating Next-Nearest Neighbor model in the dynamic behavior of a frustrated antiferromagnet
• Exploring magneto-electric coupling through lattice distortions: insights from a pantograph model
• 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