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首页> 外文期刊>Physical review >Persistence of local-moment antiferromagnetic order in Ba_(1-x)K_xMn_2As_2
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Persistence of local-moment antiferromagnetic order in Ba_(1-x)K_xMn_2As_2

机译：Ba_（1-x）K_xMn_2As_2中局部矩反铁磁序的持久性

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摘要

BaMn_2As_2 is a local-moment antiferromagnetic insulator with a Neel temperature T_N of 625 K and a large ordered moment of 3.9 μ_B/Mn. Remarkably, this compound can be driven metallic by the substitution of as little as 1.6% K for Ba while retaining essentially the same ordered magnetic moment and Neel temperature, as previously reported. Here, using both powder and single crystal neutron diffraction we show that the local moment antiferromagnetic order in Ba_(1-x)K_xMn_2As_2 remains robust up to x = 0.4. The ordered moment is nearly independent of x for 0 ≤ x ≤ 0.4 and T_N decreases to 480 K at x = 0.4.
机译：BaMn_2As_2是局部矩反铁磁绝缘体，其Neel温度T_N为625 K，大有序矩为3.9μB/ Mn。值得注意的是，该化合物可以通过用低至1.6％的K取代Ba来驱动金属，同时保持基本相同的有序磁矩和Neel温度，如先前报道。在这里，使用粉末和单晶中子衍射，我们表明Ba_（1-x）K_xMn_2As_2中的局部矩反铁磁序在x = 0.4时仍保持稳健。当0≤x≤0.4时，有序矩几乎与x无关，并且在x = 0.4时T_N降至480K。

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  • 来源
    《Physical review》 |2013年第14期|144418.1-144418.5|共5页
  • 作者

    J. Lamsal; G. S. Tucker; T. W. Heitmann; A. Kreyssig; A. Jesche; Abhishek Pandey; Wei Tian; R. J. McQueeney; D. C. Johnston; A. I. Goldman;

  • 作者单位

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

    The Missouri Research Reactor, University of Missouri, Columbia, Missouri 65211, USA;

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

    Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA;

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

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  • 关键词

    magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.);

    机译：磁相边界（包括磁跃迁;超磁性等）;

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