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首页> 外文期刊>Physical review >Evolution of incommensurate spin order with magnetic field and temperature in the itinerant antiferromagnet GdSi
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Evolution of incommensurate spin order with magnetic field and temperature in the itinerant antiferromagnet GdSi

机译：迭代反铁磁体GdSi中自旋阶数随磁场和温度的变化

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摘要

GdSi exhibits spin-density-wave (SDW) order arising from the cooperative interplay of sizeable local moments and a partially nested Fermi sea of itinerant electrons. Using magnetotransport, magnetization, and nonresonant magnetic x-ray diffraction techniques, we determine the H-T phase diagrams of GdSi for magnetic fields up to 21 T, where antiferromagnetic order is no longer stable, and field directions along each of the three major crystal axes. While the incommensurate magnetic ordering vector that characterizes the SDW is robust under magnetic field, the multiple spin structures of this compound are highly flexible and rotate relative to the applied field via either canting or spin-flop processes. The antiferromagnetic spin densities always arrange themselves transverse to the applied magnetic field direction. The phase diagrams are delineated by two types of phase boundaries: one separates a collinear from a planar spin structure associated with a lattice structural transition, and the other defines a spin flop transition that is only weakly temperature dependent. The major features of the phase diagrams along each of the crystal axes can be explained by the combination of local moment and global Fermi surface physics at play.
机译：GdSi表现出自旋密度波（SDW）顺序，该顺序是由可观的局部矩与流动电子的部分嵌套费米海的相互作用共同产生的。使用磁传输，磁化和非共振X射线衍射技术，我们确定了高达21 T的磁场（反铁磁序不再稳定）的GdSi的H-T相图，以及沿着三个主要晶体轴的磁场方向。尽管表征SDW的不相称的磁性排序向量在磁场下仍然很健壮，但该化合物的多个自旋结构具有很高的柔韧性，并且可以通过倾斜或自旋过程相对于所施加的磁场旋转。反铁磁自旋密度总是使其自身横向于所施加的磁场方向。相图由两种类型的相界描绘：一种将共线与与晶格结构转变相关的平面自旋结构分开，另一种定义了仅随温度而变的自旋触发器转变。沿每个晶轴的相图的主要特征可以通过将局部矩和整体费米表面物理学结合起来进行解释。

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  • 来源
    《Physical review》 |2013年第13期|134404.1-134404.8|共8页
  • 作者

    Yejun Feng; D. M. Silevitch; Jiyang Wang; A. Palmer; Nayoon Woo; J.-Q. Yan; Z. Islam; A. V. Suslov; P. B. Littlewood; T. F. Rosenbaum;

  • 作者单位

    The Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA,The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA;

    The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA;

    The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA;

    The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA;

    The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA;

    Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA,Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA;

    The Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA;

    National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA;

    The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA,Physical Sciences and Engineering, Argonne National Laboratory, Argonne, Illinois 60439, USA;

    The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA;

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  • 正文语种 eng
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  • 关键词

    spin-density waves; magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.); galvanomagnetic and other magnetotransport effects;

    机译：自旋密度波磁相边界（包括磁跃迁;超磁性等）;电磁和其他磁传输效应;

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