Structure and magnetic properties of the pyrochlore iridate Y 2Ir 2O 7

M. C. Shapiro; Scott 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 Y ₂Ir ₂O ₇

M. C. Shapiro, Scott 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 ₂Ir ₂O 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 ∼0.2 μ _B/Ir (for a magnetic structure with wave vector Q*0) or ∼0.5 μ _B/Ir (for Q=0).

Original language	English
Article number	214434
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	85
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.85.214434
State	Published - Jun 26 2012

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title = "Structure and magnetic properties of the pyrochlore iridate Y 2Ir 2O 7 ",

abstract = "Neutron powder diffraction and inelastic measurements were performed examining the 5d pyrochlore Y 2Ir 2O 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 ∼0.2 μ B/Ir (for a magnetic structure with wave vector Q*0) or ∼0.5 μ B/Ir (for Q=0).",

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T1 - Structure and magnetic properties of the pyrochlore iridate Y 2Ir 2O 7

AU - Shapiro, M. C.

AU - Riggs, Scott C.

AU - Stone, M. B.

AU - De La Cruz, C. R.

AU - Chi, S.

AU - Podlesnyak, A. A.

AU - Fisher, I. R.

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AB - Neutron powder diffraction and inelastic measurements were performed examining the 5d pyrochlore Y 2Ir 2O 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 ∼0.2 μ B/Ir (for a magnetic structure with wave vector Q*0) or ∼0.5 μ B/Ir (for Q=0).

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Structure and magnetic properties of the pyrochlore iridate Y ₂Ir ₂O ₇

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