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Quenched Slonczewski windmill in spin-torque vortex oscillators

机译:旋转转矩涡旋振荡器中的淬冷Slonczewski风车

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摘要

We present a combined analytical and numerical study on double-vortex spin-torque nano-oscillators and describe a mechanism that suppresses the windmill modes. The magnetization dynamics is dominated by the gyrotropic precession of the vortex in one of the ferromagnetic layers. In the other layer, the vortex gyration is strongly damped. The dominating layer for the magnetization dynamics is determined by the sign of the product between sample current and the chiralities. Measurements on Fe/Ag/Fe nanopillars support these findings. The results open up a new perspective for building high quality-factor spin-torque oscillators operating at selectable, well-separated frequency bands.
机译:我们目前对双涡旋自旋转矩纳米振荡器进行分析和数值研究,并描述了一种抑制风车模式的机制。磁化动力学由铁磁性层之一中的旋涡的旋进旋进控制。在另一层中,涡旋回旋被强烈抑制。磁化动力学的主导层取决于样品电流和手性之间的乘积符号。对Fe / Ag / Fe纳米柱的测量结果支持了这些发现。该结果为构建高质量因子自旋转矩振荡器提供了新的视角,该振荡器工作在可选择的,良好分离的频带上。

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  • 来源
    《Physical review》 |2012年第21期|214422.1-214422.6|共6页
  • 作者单位

    Peter Griinberg Institute, Electronic Properties (PGI-6) and Juelich-Aachen Research Alliance, Fundamentals of Future Information Technology (JARA-FIT), Forschungszentrum Juelich GmbH, D-52425 Juelich, Germany,Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e. V., D-01314 Dresden, Germany;

    Peter Griinberg Institute, Electronic Properties (PGI-6) and Juelich-Aachen Research Alliance, Fundamentals of Future Information Technology (JARA-FIT), Forschungszentrum Juelich GmbH, D-52425 Juelich, Germany;

    Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e. V, D-01314 Dresden, Germany;

    Peter Griinberg Institute, Electronic Properties (PGI-6) and Juelich-Aachen Research Alliance, Fundamentals of Future Information Technology (JARA-FIT), Forschungszentrum Juelich GmbH, D-52425 Juelich, Germany;

    Institut de Physique et Chimie des Materiaux de Strasbourg, Universite de Strasbourg, CNRS UMR 7504, F-67034 Strasbourg Cedex 2, France;

    Peter Griinberg Institute, Electronic Properties (PGI-6) and Juelich-Aachen Research Alliance, Fundamentals of Future Information Technology (JARA-FIT), Forschungszentrum Juelich GmbH, D-52425 Juelich, Germany;

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  • 正文语种 eng
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  • 关键词

    magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields; spin polarized transport; magnetic properties and materials;

    机译:磁电子学自旋电子学:利用自旋极化传输或集成磁场的设备;自旋极化传输;磁性和材料;

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