Correlation of magnetoelectric coupling in multiferroic BaTiO3-BiFeO3 superlattices with oxygen vacancies and antiphase octahedral rotations

被引：61
作者：
Lorenz, Michael [1 ]
Wagner, Gerald [2 ]
Lazenka, Vera [3 ]
Schwinkendorf, Peter [1 ]
Modarresi, Hiwa [3 ]
Van Bael, Margriet J. [4 ]
Vantomme, Andre [3 ]
Temst, Kristiaan [3 ]
Oeckler, Oliver [2 ]
Grundmann, Marius [1 ]
机构：
[1] Univ Leipzig, Inst Expt Phys 2, D-04103 Leipzig, Germany
[2] Univ Leipzig, Inst Mineral Kristallog & Mat Wissensch, D-04275 Leipzig, Germany
[3] Katholieke Univ Leuven, Inst Kern & Stralingsfys, B-3001 Leuven, Belgium
[4] Katholieke Univ Leuven, Lab Vaste Stoffys & Magnetisme, B-3001 Leuven, Belgium
来源：
APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 01期
关键词：
ELECTRON-DIFFRACTION;
D O I：
10.1063/1.4905343
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Multiferroic (BaTiO3-BiFeO3) x 15 multilayer heterostructures show high magnetoelectric (ME) coefficients alpha(ME) up to 24 V/cm.Oe at 300 K. This value is much higher than that of a single-phase BiFeO3 reference film (alpha(ME) = 4.2 V/cm.Oe). We found clear correlation of ME coefficients with increasing oxygen partial pressure during growth. ME coupling is highest for lower density of oxygen vacancy-related defects. Detailed scanning transmission electron microscopy and selected area electron diffraction microstructural investigations at 300 K revealed antiphase rotations of the oxygen octahedra in the BaTiO3 single layers, which are an additional correlated defect structure of the multilayers. (C) 2015 AIP Publishing LLC.
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页数：5
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