Evolution of the charge- and strain-mediated magnetoelectric coupling effect in the La0.7Sr0.3MnO3/BaTiO3 bilayer

被引：23
|
作者：
Li, Tingxian [1 ]
Zhang, Feipeng [2 ]
Li, Kuoshe [3 ]
Wang, Hongwei [1 ]
Tang, Zhenjie [1 ]
机构：
[1] Anyang Normal Univ, Coll Phys & Elect Engn, Anyang 455002, Peoples R China
[2] Henan Univ Urban Construct, Dept Math & Phys, Pingdingshan 467036, Peoples R China
[3] Grirem Adv Mat Co Ltd, Gen Res Inst Nonferrous Met, Natl Engn Res Cent Rare Earth Mat, Beijing 100088, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 638卷
基金：
中国国家自然科学基金;
关键词：
Multiferroics; Interface ME coupling; Strain-mediated; Charge-mediated; LAMINATE COMPOSITES; THIN-FILMS; MULTIFERROICS; MANGANITES; DEVICES;
D O I：
10.1016/j.jallcom.2015.03.121
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The epitaxial La0.7Sr0.3MnO3/BaTiO3 (LSMO/BTO) bilayer films with various volume fraction v of ferroelectric (FE) phase (BTO) are fabricated on (001) oriented LaAlO3 substrate. The value of v is regulated by changing the thickness of LSMO film, and fixing the thickness of BTO film. The value of v is demonstrated to play a key role in determining the interface magnetoelectric (ME) coupling coefficient (k) of the LSMO/BTO bilayers, i.e. a lower value of v leads to a lower value of k. Furthermore, as v is 0.91, experimental value of the ME voltage coefficient alpha(E) is higher than its calculated value, which indicates that the main ME coupling mechanism have evolved from strain-mediated to charge-mediated. This result can provide an available method for the design of multiferroic composite bilayer films with adjustable ME coupling mechanism by optimizing the volume fraction of FE phase. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：344 / 348
页数：5
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