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首页> 外文期刊>Physical review >Magnetic structure in a U(Ru_(0.92)Rh_(0.08))_2Si_2 single crystal studied by neutron diffraction in static magnetic fields up to 24 T
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Magnetic structure in a U(Ru_(0.92)Rh_(0.08))_2Si_2 single crystal studied by neutron diffraction in static magnetic fields up to 24 T

机译：U（Ru_（0.92）Rh_（0.08））_ 2Si_2单晶的磁性结构，通过中子衍射在高达24 T的静磁场中进行研究

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摘要

We report a high-field-induced magnetic phase in a single crystal of U(Ru_(0.92)Rh_(0.08)_2Si_2. Our neutron study, combined with high-field magnetization, shows that the magnetic phase above the first metamagnetic transition at μ_0H_(c1) = 21.6 T has an uncompensated commensurate antiferromagnetic structure with a propagation vector Q_2 = ((2/3)00) possessing two single-Q domains. U moments of 1.45(9)μ_B directed along the c axis are arranged in an up-up-down sequence propagating along the a axis, in agreement with bulk measurements. The U magnetic form factor at high fields is consistent with both the U~(3+) and U~(4+) types. The low-field short-range order that emerges from pure URu_2Si_2 due to Rh doping is initially strengthened by the field but disappears in the field-induced phase. The tetragonal symmetry is preserved across the transition, but the α-axis lattice parameter increases already at low fields. Our results are in agreement with an itinerant electron model with 5f states forming bands pinned in the vicinity of the Fermi surface that is significantly reconstructed by the applied magnetic field.
机译：我们报告了U（Ru_（0.92）Rh_（0.08）_2Si_2单晶中的高场感应磁相，我们的中子研究与高场磁化强度相结合，表明在第一个亚磁跃迁以上的磁相在μ_0H_ （c1）= 21.6 T具有无补偿的对应反铁磁结构，其传播矢量Q_2 =（（2/3）00）具有两个单Q域，沿c轴定向的U矩1.45（9）μ_B排列在沿a轴向上-向下-向下传播的序列，与批量测量结果一致，高磁场下的U磁形状因数与U〜（3+）和U〜（4+）类型一致。纯URu_2Si_2由于Rh掺杂而产生的短程有序增强在场中开始，但在场诱导相中消失，在过渡过程中保持了四边形对称性，但在低场中α轴晶格参数已经增加。我们的结果与具有5f stat的迭代电子模型一致形成束缚在费米表面附近的带，该带被施加的磁场显着地重建。

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  • 来源
    《Physical review》 |2017年第12期|121117.1-121117.5|共5页
  • 作者

    K. Prokes; M. Bartkowiak; O. Rivin; O. Prokhnenko; T. Foerster; S. Gerischer; R. Wahle; Y.-K. Huang; J. A. Mydosh;

  • 作者单位

    Helmholtz-Zentrum Berlin fuer Materialien und Energie, Hahn-Meitner Platz 1, D-14109 Berlin, Germany;

    Helmholtz-Zentrum Berlin fuer Materialien und Energie, Hahn-Meitner Platz 1, D-14109 Berlin, Germany;

    Helmholtz-Zentrum Berlin fuer Materialien und Energie, Hahn-Meitner Platz 1, D-14109 Berlin, Germany;

    Helmholtz-Zentrum Berlin fuer Materialien und Energie, Hahn-Meitner Platz 1, D-14109 Berlin, Germany;

    Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, D-01314 Dresden, Germany;

    Helmholtz-Zentrum Berlin fuer Materialien und Energie, Hahn-Meitner Platz 1, D-14109 Berlin, Germany;

    Helmholtz-Zentrum Berlin fuer Materialien und Energie, Hahn-Meitner Platz 1, D-14109 Berlin, Germany;

    Van der Waals-Zeeman Institute, University of Amsterdam, NL-1018 XE Amsterdam, The Netherlands;

    Kamerlingh Onnes Laboratory and Institute Lorentz, Leiden University, NL-2300 RA Leiden, The Netherlands;

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