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Epitaxial exchange-bias systems: From fundamentals to future spin-orbitronics

机译：外延交换偏置系统：从基础到未来的自旋双电子器件

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摘要

Exchange bias has been investigated for more than half a century and several insightful reviews, published around the year 2000, have already summarized many key experimental and theoretical aspects related to this phenomenon. Since then, due to developments in thin-film fabrication and sophisticated characterization methods, exchange bias continues to show substantial advances; in particular, recent studies on epitaxial systems, which is the focus of this review, allow many longstanding mysteries of exchange bias to be unambiguously resolved. The advantage of epitaxial samples lies in the well-defined interface structures, larger coherence lengths, and competing magnetic anisotropies, which are often negligible in polycrystalline samples. Beginning with a discussion of the microscopic spin properties at the ferromagnetic/antiferromagnetic interface, we correlate the details of spin lattices with phenomenological anisotropies, and finally connect the two by introducing realistic measurement approaches and models. We conclude by providing a brief perspective on the future of exchange bias and related studies in the context of the rapidly evolving interest in antiferromagnetic spintronics.
机译：对交换偏差的研究已经进行了半个多世纪，在2000年左右发表的一些有见地的评论已经总结了与这一现象有关的许多关键的实验和理论方面。从那时起，由于薄膜制造技术的发展和复杂的表征方法的发展，交换偏差继续显示出实质性的进步。特别是，最近对外延系统的研究是本综述的重点，这使得许多长期存在的交换偏差之谜得以明确解决。外延样品的优点在于定义明确的界面结构，较大的相干长度和竞争性的磁各向异性，这在多晶样品中通常可以忽略不计。从讨论铁磁/反铁磁界面的微观自旋特性开始，我们将自旋晶格的细节与现象学各向异性相关联，最后通过引入实际的测量方法和模型将两者联系起来。最后，在对反铁磁自旋电子学的兴趣迅速发展的背景下，简要介绍了汇率偏差的未来以及相关研究。

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  • 来源
    《Materials Science & Engineering》 |2016年第7期|1-20|共20页
  • 作者

    Wei Zhang; Kannan M. Krishnan;

  • 作者单位

    Materials Science Division, Argonne National Laboratory, Argonne IL 60439, United States;

    Department of Materials Sciences & Engineering, University of Washington, Seattle WA 98195, United States;

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