Strict limit on in-plane ordered magnetic dipole moment in URu2Si2

K. A. Ross; L. Harriger; Z. Yamani; W. J. L. Buyers; J. D. Garrett; A. A. Menovsky; J. A. Mydosh; C. L. Broholm

doi:10.1103/PhysRevB.89.155122

Strict limit on in-plane ordered magnetic dipole moment in URu2Si2

Strongly Correlated Electrons 2015-06-18 v1

Authors: K. A. Ross , L. Harriger , Z. Yamani , W. J. L. Buyers , J. D. Garrett , A. A. Menovsky , J. A. Mydosh , C. L. Broholm

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Abstract

Neutron diffraction is used to examine the polarization of weak static antiferromagnetism in high quality single crystalline URu2Si2. As previously documented, elastic Bragg-like diffraction develops for temperature T<T_{HO}= 17.5 K at q=(100) but not at wave vector transfer q=(001). The peak width indicates correlation lengths \xi_c=230(12) \AA \ and \xi_a=240(15) \AA. The integrated intensity of the T-dependent peaks corresponds to a sample averaged c-oriented staggered moment of \mu_{c}=0.022(1) \mu_B at T=1.7 K. The absence of T-dependent diffraction at q=(001) places a limit \mu_{\perp}<0.0011 \mu_B on an f- or d-orbital based in-plane staggered magnetic dipole moment, which is associated with multipolar orders proposed for URu_2Si_2.

Keywords

URu2Si2 neutron diffraction antiferromagnetism staggered magnetic dipole moment hidden order multipolar orders correlation lengths

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@article{arxiv.1402.2689,
  title  = {Strict limit on in-plane ordered magnetic dipole moment in URu2Si2},
  author = {K. A. Ross and L. Harriger and Z. Yamani and W. J. L. Buyers and J. D. Garrett and A. A. Menovsky and J. A. Mydosh and C. L. Broholm},
  journal= {arXiv preprint arXiv:1402.2689},
  year   = {2015}
}

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9 pages, 7 figures

Strict limit on in-plane ordered magnetic dipole moment in URu2Si2

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