Magnetism driven ferroelectricity above liquid nitrogen temperature in Y2CoMnO6

Abstract

We report multiferroic behavior in double perovskite Y2CoMnO6 with ferroelectric transition temperature Tc = 80K. The origin of ferroelectricity is associated with magnetic ordering of Co2+ and Mn4+ moments in a up-up-down-down arrangement. The saturation polarization and magnetization are estimated to be 65 uC/m2 and 6.2 Bohr magneton/f.u. respectively. The magnetoelectric coupling parameter, on the other hand, is small as a 5 Tesla field suppresses the electric polarization by only ~8%. This is corroborated with observed hysteretic behaviour at 5K that remains unsaturated even upto 7 Tesla. A model based on exchange-striction is proposed to explain the observed high temperature ferroelectricity.

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• Multiglass properties and magnetoelectric coupling in uniaxial anisotropic spin-cluster-glass Fe2TiO5
• A-site driven ferroelectricity in strained ferromagnetic L2NiMnO6 thin films
• Multicaloric effect in multiferroic Y2CoMnO6
• Ferromagnetism and the Effect of Free Charge Carriers on Electric Polarization in Y_2NiMnO_6 Double Perovskite
• Magnetic entropy change and critical exponents in double perovskite Y2NiMnO6
• Strong magnetoelectric coupling in mixed ferrimagnetic-multiferroic phases of a double perovskite
• Metamagnetic behavior and effect of field cooling on sharp magnetization jumps in multiferroic Y2CoMnO6
• Unraveling the magnetic interactions and spin state in insulating Sr${}_{2-x}$La${}_x$CoNbO${}_6$
• Ferroelectricity induced by ferriaxial crystal rotation and spin helicity in a B-site-ordered double-perovskite multiferroic In2NiMnO6
• Evidence for Multiferroic Characteristics in NdCrTiO5
• The ferroelectric polarization of Y2CoMnO6 aligns along the b-axis: the first-principles calculations
• Electronic structure and magnetic properties of 3d-4f double perovskite material
• Large Magnetocaloric effect and magnetic phase transitions in Nd${}_2$NiMnO${}_6$
• Improper Ferroelectricity in Helicoidal Antiferromagnet Cu3Nb2O8
• Structure, magnetic and dielectric properties in nano-crystalline Yb${}_2$CoMnO${}_6$
• Emergence of spin-phonon coupling in a Gd-doped Y${}_2$CoMnO${}_6$ double perovskite oxide: a combined experimental and ab-initio study
• Synthesis, Structural and Optical Properties of (ALa)(FeMn)O6 (A = Ba and Sr) Double Perovskites
• Novel dielectric anomalies due to spin-chains above and below Neel temperature in Ca3Co2O6
• Suppression of magnetic phase transition at high magnetic field and non-Debye's nature of nano-crystalline Gd${}_2$CoMnO${}_6$: a detail study of physical properties