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Spatially resolved ultrafast magnetic dynamics initiated at a complex oxide heterointerface

机译:在复杂氧化物异质界面处引发的空间分辨超快磁动力学

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摘要

Static strain in complex oxide heterostructures has been extensively used to engineer electronic and magnetic properties at equilibrium. In the same spirit, deformations of the crystal lattice with light may be used to achieve functional control across heterointerfaces dynamically. Here, by exciting large-amplitude infrared-active vibrations in a LaAlO_3 substrate we induce magnetic order melting in a NdNiO_3 film across a heterointerface. Femtosecond resonant soft X-ray diffraction is used to determine the spatiotemporal evolution of the magnetic disordering. We observe a magnetic melt front that propagates from the substrate interface into the film, at a speed that suggests electronically driven motion. Light control and ultrafast phase front propagation at heterointerfaces may lead to new opportunities in optomagnetism, for example by driving domain wall motion to transport information across suitably designed devices.
机译:复杂氧化物异质结构中的静态应变已广泛用于平衡状态下的电子和磁性性质。本着同样的精神,可以利用光使晶格变形来动态地实现跨异质界面的功能控制。在这里,通过激发LaAlO_3基板中的大振幅红外主动振动,我们在NdNiO_3薄膜中通过异质界面诱导了磁序熔化。飞秒共振软X射线衍射用于确定磁性无序的时空演化。我们观察到磁熔体前沿从基材界面传播到薄膜中,其速度暗示着电子驱动的运动。异质界面上的光控制和超快相前传播可能会带来新的光磁机会,例如,通过驱动畴壁运动来在适当设计的设备之间传输信息。

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  • 来源
    《Nature Materials》 |2015年第9期|883-888|共6页
  • 作者单位

    Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany,Center for Free Electron Laser Science, 22761 Hamburg, Germany;

    Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ Delft, The Netherlands;

    Department of Quantum Matter Physics, Universite de Geneve, 1211 Geneve, Switzerland;

    Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany,Center for Free Electron Laser Science, 22761 Hamburg, Germany;

    Department of Quantum Matter Physics, Universite de Geneve, 1211 Geneve, Switzerland,London Centre for Nanotechnology and Department of Physics and Astronomy, University College London, London WC1H 0AH, UK;

    Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany,Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, UK,Diamond Light Source, Didcot OX11 0DE, UK;

    Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany,Center for Free Electron Laser Science, 22761 Hamburg, Germany;

    Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA;

    Advanced Light Source, Lawrence Berkeley Laboratory, Berkeley, California 94720, USA;

    The Stanford Institute for Materials and Energy Sciences (SIMES), Stanford Linear Accelerator Center (SLAC) National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA;

    Linac Coherent Light Source, Stanford Linear Accelerator Center (SLAC) National Accelerator Laboratory, Menlo Park, California 94025, USA;

    Linac Coherent Light Source, Stanford Linear Accelerator Center (SLAC) National Accelerator Laboratory, Menlo Park, California 94025, USA;

    Linac Coherent Light Source, Stanford Linear Accelerator Center (SLAC) National Accelerator Laboratory, Menlo Park, California 94025, USA;

    Linac Coherent Light Source, Stanford Linear Accelerator Center (SLAC) National Accelerator Laboratory, Menlo Park, California 94025, USA;

    Linac Coherent Light Source, Stanford Linear Accelerator Center (SLAC) National Accelerator Laboratory, Menlo Park, California 94025, USA;

    Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, UK,Centre for Quantum Technologies, National University of Singapore, Singapore 117543, Singapore;

    Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, UK,Centre for Quantum Technologies, National University of Singapore, Singapore 117543, Singapore;

    Department of Quantum Matter Physics, Universite de Geneve, 1211 Geneve, Switzerland;

    Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA;

    Diamond Light Source, Didcot OX11 0DE, UK;

    Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany,Center for Free Electron Laser Science, 22761 Hamburg, Germany,Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, UK;

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