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arXiv · 1003.5221

Surface and Bulk Structural Properties of Single Crystalline Sr3Ru2O7

Biao Hu·Gregory T. McCandless·Melissa Menard·V. B. Nascimento·Julia Y. Chan·E. W. Plummer·R. Jin
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Abstract

We report temperature and thermal-cycling dependence of surface and bulk structures of double-layered perovskite Sr3Ru2O7 single crystals. The surface and bulk structures were investigated using low-energy electron diffraction (LEED) and single-crystal X-ray diffraction (XRD) techniques, respectively. Single-crystal XRD data is in good agreement with previous reports for the bulk structure with RuO6 octahedral rotation, which increases with decreasing temperature (~ 6.7(6)degrees at 300 K and ~ 8.1(2) degrees at 90 K). LEED results reveal that the octahedra at the surface are much more distorted with a higher rotation angle (~ 12 degrees between 300 and 80 K) and a slight tilt ((4.5\pm2.5) degrees at 300 K and (2.5\pm1.7) degrees at 80 K). While XRD data confirms temperature dependence of the unit cell height/width ratio (i.e. lattice parameter c divided by the average of parameters a and b) found in a prior neutron powder diffraction investigation, both bulk and surface structures display little change with thermal cycles between 300 and 80 K.

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Biao Hu, Gregory T. McCandless, Melissa Menard, V. B. Nascimento, Julia Y. Chan, E. W. Plummer, R. Jin. 2010-03-26. Surface and Bulk Structural Properties of Single Crystalline Sr3Ru2O7. https://doi.org/10.1103/physrevb.81.184104

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