Coupling of ferroelastic strain and ferroelectric phase transition in NiMnGa/Pb0.97La0.02(Zr0.95Ti0.05)O3 bilayered films
Coupling of ferroelastic strain and ferroelectric phase transition in NiMnGa/Pb0.97La0.02(Zr0.95Ti0.05)O3 bilayered films
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DOI：
10.1016/j.ceramint.2018.06.176
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发表时间：
2018-10
影响因子：
5.2
通讯作者：
Changan Wang;X. Fang;A. Zhang;M. Zeng;Z. Fan;Deyang Chen;Xingsen Gao;Xubing Lu
中科院分区：
文献类型：
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作者：
Changan Wang;X. Fang;A. Zhang;M. Zeng;Z. Fan;Deyang Chen;Xingsen Gao;Xubing Lu
材料中机械、电气和磁性参数之间的耦合效应为创造新的设备功能提供了令人兴奋的机会。在这里，我们制备了磁性形状记忆合金Ni-Mn-Ga(NMG)和反铁电材料Pb0.97La0.02Zr0.95Ti0.05O3(PLZT)的双层复合薄膜。X射线衍射、磁化强度和磁畴测量表明，NMG顶层在退火过程中发生了奥氏体-马氏体相变。同时，观察到PLZT亚层的AFE向铁电转变，这可以归因于界面应力耦合。定量的残余应力分析表明，在热处理过程中，PLZT层中的残余应力变化高达300Mpa，证实了NMG和PLZT层之间的铁弹性应力传递。这些结果为界面弹性耦合驱动复合膜的多功能开辟了一条新的途径。
Coupling effects among mechanical, electrical and magnetic parameters in a material provide exciting opportunity for creating novel device functionalities. Here, bilayer composite films combining magnetic shape memory alloy Ni-Mn-Ga (NMG) and antiferroelectric (AFE) Pb0.97La0.02Zr0.95Ti0.05O3(PLZT) have been fabricated. X-ray diffraction, magnetization, and magnetic domain measurements demonstrated an austenite-martensite transformation of NMG top-layer during the annealing. Meanwhile, an AFE to ferroelectric transition of the PLZT sub-layer is observed, which can be attributed to the interfacial stress coupling. The quantitative residual stress analysis revealed that the change of residual stress in the PLZT layer is up to 300 MPa during the annealing, confirming the ferroelastic stress transfer between the NMG and PLZT layers. These results open up a new pathway for interfacial elastic coupling driven multi-functionalities in composite films.