Magnetism driven ferroelectricity above liquid nitrogen temperature in Y2CoMnO6
TLDR
In this article, the multiferroic behavior in double perovskite Y2CoMnO6 with ferroelectric transition temperature Tc = 80 K was reported.Abstract:
We report multiferroic behaviour in double perovskite Y2CoMnO6 with ferroelectric transition temperature Tc = 80 K. Both X-ray diffraction and neutron scattering data confirm a centro-symmetric crystal structure of space group P21/n at room temperature. The saturation polarization and magnetization are estimated to be 65 μC/m2 and 6.2 μB/f.u. respectively. The magneto-electric coupling parameter, on the other hand, is small as a 5 T field suppresses the electric polarization by only ∼8%. The origin of ferroelectricity is associated with magnetic ordering of Co2+ and Mn4+ moments in ↑↑-↓↓ arrangement. A model based on exchange-striction is proposed to explain the observed high temperature ferroelectricity.read more
Citations
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Giant zero field cooled spontaneous exchange bias effect in phase separated La1.5Sr0.5CoMnO6
J. Krishna Murthy,A. Venimadhav +1 more
TL;DR: In this paper, the authors reported a giant zero field cooled exchange bias (ZEB) effect (∼0.65 T ) in La1.5Sr0.5CoMnO6 sample.
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Giant magnetocaloric effect in Gd2NiMnO6 and Gd2CoMnO6 ferromagnetic insulators
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Giant magnetocaloric effect in Gd2NiMnO6 and Gd2CoMnO6 ferromagnetic insulators
TL;DR: In this paper, the magnetocaloric effect in double perovskite Gd2NiMnO6 (GNMO) and GCMO samples was investigated by magnetic and heat capacity measurements.
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Griffiths phase, spin-phonon coupling, and exchange bias effect in double perovskite Pr2CoMnO6
TL;DR: In this article, the authors studied the phonon behavior of double perovskite Pr2CoMnO6 and showed that phonon softening extends up to TG.
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Magnetism-Driven Ferroelectricity in Double Perovskite Y2NiMnO6
Jie Su,Jie Su,Zhusheng Yang,X. M. Lu,Jikang Zhang,Lin Gu,Chaojing Lu,Qinghao Li,J.-M. Liu,Juehua Zhu +9 more
TL;DR: The origin of the ferroelectricity is associated with the combination of Ni(2+)/Mn(4+) charge ordering and the ↑↑↓↓ spin ordering.
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TL;DR: The discovery of ferroelectricity in a perovskite manganite, TbMnO3, where the effect of spin frustration causes sinusoidal antiferromagnetic ordering and gigantic magnetoelectric and magnetocapacitance effects are found.
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TL;DR: Spatial maps of coupled antiferromagnetic and ferroelectric domains in YMnO3 are obtained by imaging with optical second harmonic generation and lead to a configuration that is dominated by the ferroelectromagnetic product of the order parameters.
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Conduction at domain walls in oxide multiferroics
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TL;DR: The observation of room-temperature electronic conductivity at ferroelectric domain walls in the insulating multiferroic BiFeO(3) shows that the conductivity correlates with structurally driven changes in both the electrostatic potential and the local electronic structure, which shows a decrease in the bandgap at the domain wall.
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Multiferroics: Past, present, and future
TL;DR: In this article, theorists and experimentalists have found promising new ways to get two traditional foes (ferroelectricity and magnetism) to coexist, and they have proposed new methods to get them to work in concert.