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Single-crystal neutron diffraction study of short-range magnetic correlations in Tb5Ge4
Physical Review B
  • W. Tian, Iowa State University
  • Andreas Kreyssig, Iowa State University
  • Jerel L. Zarestky, Iowa State University
  • L. Tan, Iowa State University
  • Shibabrata Nandi, Iowa State University
  • Alan I. Goldman, Iowa State University
  • Thomas A. Lograsso, Iowa State University
  • Deborah L. Schlagel, Iowa State University
  • Karl A. Gschneidner, Jr., Iowa State University
  • Vitalij K. Pecharsky, Iowa State University
  • Robert J. McQueeney, Iowa State University
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We present a single-crystal neutron diffraction study of the magnetic short-range correlations in Tb5Ge4 which orders antiferromagnetically below the Neel temperature TN≈92 K. Strong diffuse scattering arising from magnetic short-range correlations was observed in wide temperature ranges both below and above TN. The antiferromagnetic ordering in Tb5Ge4 is described to consist of strongly coupled ferromagnetic block layers in the ac plane that stack along the b axis with weak antiferromagnetic interlayer coupling. Diffuse scattering was observed along both a∗ and b∗ directions indicating three-dimensional short-range correlations. Moreover, the q dependence of the diffuse scattering is Squared Lorentzian in form suggesting a strongly clustered magnetic state that may be related to the proposed Griffiths-like phase in Gd5Ge4.

This article is from Physical Review B 80 (2009): 134422, doi:10.1103/PhysRevB.80.134422.

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American Physical Society
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W. Tian, Andreas Kreyssig, Jerel L. Zarestky, L. Tan, et al.. "Single-crystal neutron diffraction study of short-range magnetic correlations in Tb5Ge4" Physical Review B Vol. 80 Iss. 13 (2009) p. 134422
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