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Interplay of Fe and Nd magnetism in NdFeAsO single crystals
Physical Review B
  • W. Tian, Iowa State University
  • W. Ratcliff, II, National Institute of Standards and Technology
  • M. G. Kim, Iowa State University
  • J.-Q. Yan, Iowa State University
  • P. A. Klenzle, National Institute of Standards and Technology
  • Q. Huang, National Institute of Standards and Technology
  • Brandt A. Jensen, Iowa State University
  • Kevin W. Dennis, Iowa State University
  • R. William McCallum, Iowa State University
  • Thomas A. Lograsso, Iowa State University
  • Robert J. McQueeney, Iowa State University
  • Alan I. Goldman, Iowa State University
  • J. W. Lynn, National Institute of Standards and Technology
  • Andreas Kreyssig, Iowa State University
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The structural and magnetic phase transitions have been studied on NdFeAsO single crystals by neutron and x-ray diffraction complemented by resistivity and specific-heat measurements. Two low-temperature phase transitions have been observed in addition to the tetragonal-to-orthorhombic transition at TS∼142 K and the onset of antiferromagnetic (AFM) Fe order belowTN∼137 K. The Fe moments order AFM in the well-known stripelike structure in the (ab) plane but change from AFM to ferromagnetic (FM) arrangement along the c direction below T∗∼15 K accompanied by the onset of Nd AFM order below TNd∼6 K with this same AFM configuration. The iron magnetic order-order transition in NdFeAsO accentuates the Nd-Fe interaction and the delicate balance of c-axis exchange couplings that results in AFM in LaFeAsO and FM in CeFeAsO and PrFeAsO.


This article is from Physical Review B 82 (2010): 060514(R), doi:10.1103/PhysRevB.82.060514.

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American Physical Society
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W. Tian, W. Ratcliff, M. G. Kim, J.-Q. Yan, et al.. "Interplay of Fe and Nd magnetism in NdFeAsO single crystals" Physical Review B Vol. 82 Iss. 6 (2010) p. 060514(R)
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