# Emergence of magnetic long-range order in frustrated pyrochlore Nd$\_2$Ir$\_2$O$\_7$ with metal-insulator transition Source: [Emergence of magnetic long-range order in frustrated pyrochlore Nd$\_2$Ir$\_2$O$\_7$ with metal-insulator transition]() Collection index: [llms.txt]() Data updated: 2025-10-24T13:58:14.573Z Authors: K. Tomiyasu, K. Matsuhira, K. Iwasa, M. Watahiki, S. Takagi, M. Wakeshima, Y. Hinatsu, M. Yokoyama, K. Ohoyama, K. Yamada Published: 2011-10-30T13:02:42.000Z ## Abstract In this study, we performed powder neutron diffraction and inelastic scattering measurements of frustrated pyrochlore Nd$\_2$Ir$\_2$O$\_7$, which exhibits a metal-insulator transition at a temperature $T\_{\\rm MI}$ of 33 K. The diffraction measurements revealed that the pyrochlore has an antiferromagnetic long-range structure with propagation vector $\\vec{q}\_{0}$ of (0,0,0) and that it grows with decreasing temperature below 15 K. This structure was analyzed to be of the all-in all-out type, consisting of highly anisotropic Nd$^{3+}$ magnetic moments of magnitude $2.3\\pm0.4$$\\mu\_{\\rm B}$, where $\\mu\_{\\rm B}$ is the Bohr magneton. The inelastic scattering measurements revealed that the Kramers ground doublet of Nd$^{3+}$ splits below $T\_{\\rm MI}$. This suggests the appearance of a static internal magnetic field at the Nd sites, which probably originates from a magnetic order consisting of Ir$^{4+}$ magnetic moments. Here, we discuss a magnetic structure model for the Ir order and the relation of the order to the metal-insulator transition in terms of frustration. ## Recorded benchmark results A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage. ## Original sources and implementation [Original paper]() [PDF]()