首页> 外文OA文献 >Effects of biaxial strain on the improper multiferroicity in \u3ci\u3eh\u3c/i\u3e-LuFeO\u3csub\u3e3\u3c/sub\u3e films studied using the restrained thermal expansion method
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Effects of biaxial strain on the improper multiferroicity in \u3ci\u3eh\u3c/i\u3e-LuFeO\u3csub\u3e3\u3c/sub\u3e films studied using the restrained thermal expansion method

机译:双轴应变对不良多铁性的影响研究使用的薄膜研究使用的薄膜是不合适的多铁性的...原文链接 约束热膨胀法

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摘要

Elastic strain is potentially an important approach in tuning the properties of the improperly multiferroic hexagonal ferrites, the details of which, however, have been elusive due to experimental difficulties. Employing the method of restrained thermal expansion, we have studied the effect of isothermal biaxial strain in the basal plane of h-LuFeO3 (001) films. The results indicate that a compressive biaxial strain significantly enhances the K3 structural distortion (the order parameter of the improper ferroelectricity), and the effect is larger at higher temperatures. The compressive biaxial strain and the enhanced K3 structural distortion together cause an increase in the electric polarization and a reduction in the canting of the weak ferromagnetic moments in h-LuFeO3, according to our first principles calculations. These findings are important for understanding the strain effect as well as the coupling between the lattice and the improper multiferroicity in h-LuFeO3. The experimental elucidation of the strain effect in h-LuFeO3 films also suggests that the restrained thermal expansion can be a viable method to unravel the strain effect in many other thin film materials.
机译:弹性应变可能是调节不合适的多铁性六角形铁氧体性能的重要方法,但是由于实验困难,其细节难以捉摸。利用抑制热膨胀的方法,我们研究了h-LuFeO3(001)薄膜基面上等温双轴应变的影响。结果表明,压缩双轴应变显着增强了K3结构畸变(铁电性不正确的有序参数),并且在较高温度下影响更大。根据我们的第一个原理计算,压缩双轴应变和增强的K3结构变形共同导致h-LuFeO3中的电极化增加和弱铁磁矩的倾斜减小。这些发现对于理解应变效应以及h-LuFeO3中晶格与不合适的多铁性之间的耦合非常重要。对h-LuFeO3薄膜中应变效应的实验说明也表明,抑制热膨胀可能是揭示许多其他薄膜材料中应变效应的可行方法。

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