Magnetic Control of Ferroelectric Polarization in a Self-formed Single Magnetoelectric Domain of Multiferroic Ba3NbFe3Si2O14

作者: Nara Lee , Young Jai Choi , Sang-Wook Cheong

DOI: 10.1063/1.4866187

关键词: Néel temperatureMultiferroicsFerroelectricityMaterials scienceMagnetoelectric effectCondensed matter physicsPolingPerpendicularMagnetic fieldPolarization (waves)

摘要: We have discovered strong magnetoelectric (ME) effects in the single chiral-helical magnetic state of single-crystalline langasite Ba3NbFe3Si2O14 that is crystallographically chiral. The ferroelectric polarization, predominantly aligned along the a axis below the Nèel temperature of∼ 27 K, changes in a highly non-linear fashion in the presence of in-plane magnetic fields (H) perpendicular to the a axis (H//b*). This ME effect as well as smaller ME effects in other directions exhibit no poling dependence, suggesting the presence of a self …

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