@article{4860a4c7b21f41148bdd48e996dc2a7c,
title = "Structural ordering and symmetry breaking in (formula presented)",
abstract = "Single-crystal x-ray-diffraction measurements have been carried out on (formula presented) near and below the phase transition it exhibits at (formula presented) (formula presented) was recently discovered as the first, and to date only, superconductor that displays the cubic pyrochlore structure at room temperature. Superlattice Bragg peaks show an apparently continuous structural transition at (formula presented) however, their behavior is unconventional. The evolution with temperature of these Bragg intensities show anomalously strong temperature dependence at low temperatures, where it falls off as (formula presented) and resolution limited critical-like scattering is seen above (formula presented) High-resolution measurements show that the high-temperature cubic Bragg peaks split on entering the low-temperature phase, indicating a (likely tetragonal) lowering of symmetry below (formula presented).",
author = "Castellan, {J. P.} and Gaulin, {B. D.} and {van Duijn}, J. and Lewis, {M. J.} and Lumsden, {M. D.} and R. Jin and J. He and Nagler, {S. E.} and D. Mandrus",
year = "2002",
doi = "10.1103/PhysRevB.66.134528",
language = "English",
volume = "66",
pages = "1--5",
journal = "Physical Review B - Condensed Matter and Materials Physics",
issn = "1098-0121",
publisher = "American Physical Society",
number = "13",
}