Structure and Magnetic Properties of the Pyrochlore Iridate Y2Ir2O7

M. C. Shapiro; S. C. Riggs; M. B. Stone; C. R. de la Cruz; S. Chi; A. A. Podlesnyak; I. R. Fisher

doi:10.1103/PhysRevB.85.214434

Structure and Magnetic Properties of the Pyrochlore Iridate Y2Ir2O7

Strongly Correlated Electrons 2014-05-30 v1 Materials Science

Authors: M. C. Shapiro , S. C. Riggs , M. B. Stone , C. R. de la Cruz , S. Chi , A. A. Podlesnyak , I. R. Fisher

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Abstract

Neutron powder diffraction and inelastic measurements were performed examining the 5d pyrochlore Y $_2$ Ir $_2$ O $_7$ . Temperature dependent measurements were performed between 3.4 K and 290 K, spanning the magnetic transition at 155 K. No sign of any structural or disorder induced phase transition was observed over the entire temperature range. In addition, no sign of magnetic long-range order was observed to within the sensitivity of the instrumentation. These measurements do not rule out long range magnetic order, but the neutron powder diffraction structural refinements do put an upper bound for the ordered iridium moment of $\sim$ 0.2 $\mu_B /$ Ir (for a magnetic structure with wave vector $Q \neq 0$ ) or $\sim$ 0.5 $\mu_B /$ Ir (for Q = 0).

Keywords

magnetic structure phase transitions magnetic materials and spin systems

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@article{arxiv.1201.5419,
  title  = {Structure and Magnetic Properties of the Pyrochlore Iridate Y2Ir2O7},
  author = {M. C. Shapiro and S. C. Riggs and M. B. Stone and C. R. de la Cruz and S. Chi and A. A. Podlesnyak and I. R. Fisher},
  journal= {arXiv preprint arXiv:1201.5419},
  year   = {2014}
}

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5 pages, 8 figures

Structure and Magnetic Properties of the Pyrochlore Iridate Y2Ir2O7

Abstract

Keywords

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