Tunable Strain in Magnetoelectric ZnO Microrod Composite Interfaces.
Tunable Strain in Magnetoelectric ZnO Microrod Composite Interfaces.
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DOI：
10.1021/acsami.6b15598
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发表时间：
2017-07
影响因子：
9.5
通讯作者：
S. Hrkac;C. Koops;M. Abes;C. Krywka;Martin Müller;M. Burghammer;M. Sztucki;T. Dane;S. Kaps;Y. Mishra;R. Adelung;Julius Schmalz;M. Gerken;E. Lage;C. Kirchhof;E. Quandt;O. Magnussen;B. Murphy
中科院分区：
文献类型：
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作者：
S. Hrkac;C. Koops;M. Abes;C. Krywka;Martin Müller;M. Burghammer;M. Sztucki;T. Dane;S. Kaps;Y. Mishra;R. Adelung;Julius Schmalz;M. Gerken;E. Lage;C. Kirchhof;E. Quandt;O. Magnussen;B. Murphy
磁电复合材料中耦合元件处的本征应变对材料的性能和功能起着重要的作用。在原位X射线纳米衍射实验中，涂层诱导以及磁场诱导的复杂磁电微复合材料的耦合界面处的应变进行了研究。这些包括压电ZnO微棒涂有磁致伸缩（Fe 90 Co 10）78 Si 12 B10的非晶层。当本征应变在10-4范围内时，磁场感应应变在10-5范围内，小一个数量级。此外，两种应变叠加的应变弛豫距离约为5 μm，表明相关性。本征应变和磁场诱导应变的值可以通过棒状复合材料的直径来操纵。ZnO内的本征界面应变随棒径的减小呈指数增加，而磁场诱导应变在给定范围内呈线性增加。研究表明，烧结对磁电复合材料的性能有很大的影响，导致了强烈增强的应变场和磁响应。
The intrinsic strain at coupled components in magnetoelectric composites plays an important role for the properties and function of these materials. In this in situ X-ray nanodiffraction experiment, the coating-induced as well as the magnetic-field-induced strain at the coupled interface of complex magnetoelectric microcomposites were investigated. These consist of piezoelectric ZnO microrods coated with an amorphous layer of magnetostrictive (Fe90Co10)78Si12B10. While the intrinsic strain is in the range of 10-4, the magnetic-field-induced strain is within 10-5, one order of magnitude smaller. Additionally, the strain relaxation distance of around 5 μm for both kinds of strain superposes indicating a correlation. The value of both intrinsic and magnetic-field-induced strain can be manipulated by the diameter of the rodlike composite. The intrinsic interface strain within the ZnO increases exponentially by decreasing the rod diameter while the magnetic-field-induced strain increases linearly within the given range. This study shows that miniaturizing has a huge impact on magnetoelectric composite properties, resulting in a strongly enhanced strain field and magnetic response.