Orbital Ordering in Room Temperature Ferromagnet Sr$_3$YCo$_4$O$_{10.5}$ Studied by a Resonant X-ray Scattering ORAL Abstract Sr$_{1-x} R_x$Co$_4$O$_{10.5}$ ($R=$Y and lanthanide, $0.2 March 10, 2008, 12:27 PM – March 10, 2008, 12:39 PM Authors Hironori Nakao Tohoku Univ. Tetsuya Murata Tohoku Univ. Daisuke Bizen Tohoku Univ. Youich Murakami Tohoku Univ. Shintaro Ishiwata JST-ERATO Wataru Kobayashi Waseda Univ. Ichiro Terasaki Waseda Univ.