Impact of magnetization and hyperfine field distribution on high magnetoelectric coupling strength in BaTiO3-BiFeO3 multilayers

被引：14
|
作者：
Jochum, Johanna K. [1 ]
Lorenz, Michael [2 ]
Gunnlaugsson, Haraldur P. [3 ]
Patzig, Christian [4 ]
Hoeche, Thomas [4 ]
Grundmann, Marius [2 ]
Vantomme, Andre [3 ]
Temst, Kristiaan [3 ]
Van Bael, Margriet J. [1 ]
Lazenka, Vera
机构：
[1] Katholieke Univ Leuven, Lab Vaste Stoffys Magnetisme, Celestijnenlaan 200D, B-3001 Leuven, Belgium
[2] Univ Leipzig, Felix Bloch Inst Festkorperphys, Linnestr 5, D-04103 Leipzig, Germany
[3] Katholieke Univ Leuven, Inst Kern Stralingsfys, Celestijnenlaan 200D, B-3001 Leuven, Belgium
[4] Fraunhofer Inst Mikrostruktur Werkstoffen & Syst, Ctr Appl Microstruct Diagnost, Walter Hulse Str 1, D-06120 Halle, Germany
来源：
NANOSCALE | 2018年 / 10卷 / 12期
关键词：
D O I：
10.1039/c8nr00430g
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Correlations were established between the hyperfine field distribution around the Fe atoms, the multiferroic properties, and the high magnetoelectric coefficient in BaTiO3-BiFeO3 multilayer stacks with variable BiFeO3 single layer thickness, down to 5 nm. Of key importance in this study was the deposition of Fe-57 - enriched BiFeO3, which enhances the sensitivity of conversion electron Mossbauer spectroscopy by orders of magnitude. The magnetoelectric coefficient alpha(ME) reaches a maximum of 60.2 V cm(-1) Oe(-1) at 300 K and at a DC bias field of 2 Tesla for a sample of 15 x (10 nm BaTiO3-5 nm BiFeO3) and is one of the highest values reported so far. Interestingly, the highest alpha(ME) is connected to a high asymmetry of the hyperfine field distribution of the multilayer composite samples. The possible mechanisms responsible for the strong magnetoelectric coupling are discussed.
引用
收藏
页码：5574 / 5580
页数：7
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