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Thermal Driven Giant Spin Dynamics at Three-Dimensional Heteroepitaxial Interface in Ni0.5Zn0.5Fe2O4/BaTiO3-Pillar Nanocomposites
ACS Nano ( IF 15.8 ) Pub Date : 2018-03-02 00:00:00 , DOI: 10.1021/acsnano.8b00962 Guohua Dong 1 , Ziyao Zhou 1 , Mengmeng Guan 1 , Xu Xue 1 , Mingfeng Chen 2 , Jing Ma 2 , Zhongqiang Hu 1 , Wei Ren 1 , Zuo-Guang Ye 3 , Ce-Wen Nan 2 , Ming Liu 1
ACS Nano ( IF 15.8 ) Pub Date : 2018-03-02 00:00:00 , DOI: 10.1021/acsnano.8b00962 Guohua Dong 1 , Ziyao Zhou 1 , Mengmeng Guan 1 , Xu Xue 1 , Mingfeng Chen 2 , Jing Ma 2 , Zhongqiang Hu 1 , Wei Ren 1 , Zuo-Guang Ye 3 , Ce-Wen Nan 2 , Ming Liu 1
Affiliation
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Traditional magnetostrictive/piezoelectric laminated composites rely on the two-dimensional interface that transfers stress/strain to achieve the large magnetoelectric (ME) coupling, nevertheless, they suffer from the theoretical limitation of the strain effect and of the substrate clamping effect in real ME applications. In this work, 3D NZFO/BTO-pillar nanocomposite films were grown on SrTiO3 by template-assisted pulsed laser deposition, where BaTiO3 (BTO) nanopillars appeared in an array with distinct phase transitions as the cores were covered by NiZn ferrite (NZFO) layer. The perfect 3D heteroepitaxial interface between BTO and NZFO phases can be identified without any edge dislocations, which allows effective strain transfer at the 3D interface. The 3D structure nanocomposites enable the strong two magnon scattering (TMS) effect that enhances ME coupling at the interface and reduces the clamping effect by strain relaxation. Thereby, a large FMR field shift of 1866 Oe in NZFO/BTO-pillar nanocomposite was obtained at the TMS critical angle near the BTO nanopillars phase transition of 255 K.
中文翻译：
Ni 0.5 Zn 0.5 Fe 2 O 4 / BaTiO 3-柱纳米复合材料中三维异质外延界面的热驱动巨自旋动力学
传统的磁致伸缩/压电叠层复合材料依靠传递应力/应变的二维界面来实现大的磁电（ME）耦合，但是，它们在实际的ME应用中受到了应变效应和衬底夹持效应的理论限制。在这项工作中，通过模板辅助脉冲激光沉积在SrTiO 3上生长了3D NZFO / BTO柱状纳米复合膜，其中BaTiO 3（BTO）纳米柱排列成具有明显相变的阵列，因为芯层被NiZn铁氧体（NZFO）层覆盖。可以确定BTO和NZFO相之间的完美3D异质外延界面，而没有任何边缘错位，从而可以在3D界面处进行有效的应变传递。3D结构纳米复合材料可实现强大的两磁子散射（TMS）效果，从而增强界面处的ME耦合并通过应变松弛降低夹持效果。因此，在255K的BTO纳米柱相变附近的TMS临界角处，在NZFO / BTO柱纳米复合物中获得了1866 Oe的大FMR场移。
更新日期：2018-03-02
中文翻译：
Ni 0.5 Zn 0.5 Fe 2 O 4 / BaTiO 3-柱纳米复合材料中三维异质外延界面的热驱动巨自旋动力学
传统的磁致伸缩/压电叠层复合材料依靠传递应力/应变的二维界面来实现大的磁电（ME）耦合，但是，它们在实际的ME应用中受到了应变效应和衬底夹持效应的理论限制。在这项工作中，通过模板辅助脉冲激光沉积在SrTiO 3上生长了3D NZFO / BTO柱状纳米复合膜，其中BaTiO 3（BTO）纳米柱排列成具有明显相变的阵列，因为芯层被NiZn铁氧体（NZFO）层覆盖。可以确定BTO和NZFO相之间的完美3D异质外延界面，而没有任何边缘错位，从而可以在3D界面处进行有效的应变传递。3D结构纳米复合材料可实现强大的两磁子散射（TMS）效果，从而增强界面处的ME耦合并通过应变松弛降低夹持效果。因此，在255K的BTO纳米柱相变附近的TMS临界角处，在NZFO / BTO柱纳米复合物中获得了1866 Oe的大FMR场移。
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