Charge Ordered State in the Impurity-Doped Manganites(Condensed Matter : Structure, Mechanical and Thermal Properties)

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概要

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• Impurity effect on the charge and orbital ordered (CO/OO) state in doped manganites has been studied by the transmission electron microscopy (TEM), in addition to the electric and magnetic measurements. In the Cr-doped manganites (Nd_<0.5>Ca_<0.5>Mn_<1-y>Cr_yO_3), the CO/OO state characterized by the incommensurate wave vector is still realized as the microdomains with the size of 10-30 nm even at lower temperature of 20K. On the other hand, the Sc-doped manganites (Nd_<0.5>Ca_<0.5>Mn_<1-y>Sc_yO_3) clearly show an incommensurate to commensurate structural phase transition accompanying the formation of the long-ranged CO/OO state around 60 K. From our experimental findings, it is suggested that the substituted Cr^<3+> and Sc^<3+> ions serve as the spin impurity and hole vacancy, respectively.

• 社団法人日本物理学会の論文
• 2002-05-15

著者

• MORI S.

  Department of Physics, Faculty of Science, Shinshu University

• Yamamoto N.

  Department of Cardiology, Surugadai Nihon University Hospital

• Moritomo Y.

  Department Of Applied Physics Nagoya University

• SHOJI R.

  Department of Embryology, Institute for Developmental Research, Aichi Prefectural and Faculty of Den

• Machida A.

  Department Of Applied Physics Nagoya University

• KATSUFUJI T.

  Department of Advanced Materials Science, University of Tokyo

• Katsufuji T.

  Department Of Advanced Materials Science University Of Tokyo

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