External stress enhanced magnetoelectric coupling in multiferroic heterostructures

被引：14

作者：

Bai, G. ^{[1
,2
]}

Gong, X. ^{[2
,3
]}

Liu, Z. G. ^{[1
,2
]}

Xia, Y. D. ^{[1
,2
]}

Yin, J. ^{[1
,2
]}

机构：

[1] Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[3] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 112卷 / 11期

基金：

中国国家自然科学基金;

关键词：

BATIO3-COFE2O4; NANOSTRUCTURES; FILMS;

D O I：

10.1063/1.4769432

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A phenomenological thermodynamic theory is used to investigate the effect of external mechanical stress on the magnetoelectric coupling in ferroelectric PbTiO3 or organic P(VDF-TrFE)/ferromagnetic Terfenol-D heterostructures. The results showed that the effects of external stress on the value of polarization strain sensitivity and magnetoelectric (ME) polarization coefficient for PbTiO3 and P(VDF-TrFE) are opposite, in which the electrostrictive constants play a significant role. However, the external stress has similar influence on the value of ME voltage coefficient in the two heterostructures. The compressive stress increases their ME voltage coefficient, and a peak appears near the stress of 200 MPa, in qualitative agreement with the experiment result. It is proposed that external stress might provide a new way to enhance or adjust magnetoelectric coupling in multiferroic heterostructures. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769432]

引用

页数：6

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