Zhang Bruce, Kalaswad Matias, Rutherford Bethany X, Misra Shikhar, He Zihao, Wang Haohan, Qi Zhimin, Wissel Ashley E, Xu Xiaoshan, Wang Haiyan
School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States.
School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States.
ACS Appl Mater Interfaces. 2020 Nov 18;12(46):51827-51836. doi: 10.1021/acsami.0c14424. Epub 2020 Nov 9.
Materials with magneto-optic coupling properties are highly coveted for their potential applications ranging from spintronics and optical switches to sensors. In this work, a new, three-phase Au-Fe-LaSrFeO (LSFO) hybrid material grown in a vertically aligned nanocomposite (VAN) form has been demonstrated. This three-phase hybrid material combines the strong ferromagnetic properties of Fe and the strong plasmonic properties of Au and the dielectric nature of the LSFO matrix. More interestingly, the immiscible Au and Fe phases form Au-encapsulated Fe nanopillars, embedded in the LSFO matrix. Multifunctionalities including anisotropic optical dielectric properties, plasmonic properties, magnetic anisotropy, and room-temperature magneto-optic Kerr effect coupling are demonstrated. The single-step growth method to grow the immiscible two-metal nanostructures (i.e., Au and Fe) in the complex hybrid material form opens exciting new potential opportunities for future three-phase VAN systems with more versatile metal selections.
具有磁光耦合特性的材料因其在自旋电子学、光开关和传感器等潜在应用中备受青睐。在这项工作中，展示了一种以垂直排列纳米复合材料（VAN）形式生长的新型三相金 - 铁 - 镧锶铁氧体（LSFO）混合材料。这种三相混合材料结合了铁的强铁磁特性、金的强等离子体特性以及LSFO基体的介电性质。更有趣的是，互不相溶的金和铁相形成了嵌入LSFO基体中的金包裹铁纳米柱。展示了包括各向异性光学介电性质、等离子体性质、磁各向异性和室温磁光克尔效应耦合在内的多功能性。以复杂混合材料形式生长互不相溶的双金属纳米结构（即金和铁）的单步生长方法，为未来具有更多样化金属选择的三相VAN系统开启了令人兴奋的新潜在机遇。
