TY - JOUR
T1 - Orbital and charge ordering in La1-cursive greek chiSr1+cursive greek chiMnO4 (0.4 ≤ cursive greek chi ≤ 0.5)
AU - Wakabayashi, Yusuke
AU - Murakami, Youichi
AU - Moritomo, Yutaka
AU - Koyama, Ichiro
AU - Nakao, Hironori
AU - Kiyama, Takashi
AU - Kimura, Tsuyoshi
AU - Tokura, Yoshinori
AU - Wakabayashi, Nobuyoshi
PY - 2001/5/1
Y1 - 2001/5/1
N2 - Hole concentration dependence of charge order (CO) and orbital order (OO) in layered perovskite compounds La1-cursive Greek chiSr1+cursive Greek chiMnO4 has been studied by means of the resonant X-ray scattering technique. Both CO and OO are observed below 210K in the compounds having the hole concentration cursive Greek chi between 0.5 and 0.48, but neither is observed for cursive Greek chi ≤ 0.46. The transition temperatures are nearly independent of cursive Greek chi between 0.5 and 0.48. Correlation lengths ξ's for both orders obtained from analyses of superlattice peak profiles are finite at any temperature. Moreover, in contrast to the cubic perovskite, ξ for OO is larger than that for CO, ξ for OO is as short as that for CO at the critical concentration of cursive Greek chi = 0.48. These results suggest that OO is prerequisite to the forming of CO in this system.
AB - Hole concentration dependence of charge order (CO) and orbital order (OO) in layered perovskite compounds La1-cursive Greek chiSr1+cursive Greek chiMnO4 has been studied by means of the resonant X-ray scattering technique. Both CO and OO are observed below 210K in the compounds having the hole concentration cursive Greek chi between 0.5 and 0.48, but neither is observed for cursive Greek chi ≤ 0.46. The transition temperatures are nearly independent of cursive Greek chi between 0.5 and 0.48. Correlation lengths ξ's for both orders obtained from analyses of superlattice peak profiles are finite at any temperature. Moreover, in contrast to the cubic perovskite, ξ for OO is larger than that for CO, ξ for OO is as short as that for CO at the critical concentration of cursive Greek chi = 0.48. These results suggest that OO is prerequisite to the forming of CO in this system.
KW - Charge order
KW - Layered structure
KW - Orbital order
KW - Resonant x-ray scattering
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U2 - 10.1143/JPSJ.70.1194
DO - 10.1143/JPSJ.70.1194
M3 - Article
AN - SCOPUS:0039560963
VL - 70
SP - 1194
EP - 1197
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 5
ER -