Charge Ordered State in the Impurity-Doped Manganites

S. Mori; R. Shoji; N. Yamamoto; A. Machida; Y. Moritomo; T. Katsufuji

doi:10.1143/JPSJ.71.1280

Charge Ordered State in the Impurity-Doped Manganites

S. Mori, R. Shoji, N. Yamamoto, A. Machida, Y. Moritomo, T. Katsufuji

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

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_0.5Ca_0.5Mn_1-yCr_yO₃), 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 20 K. On the other hand, the Sc-doped manganites (Nd _0.5Ca_0.5Mn_1-ySC_y-O₃) 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 Cr³⁺ and Sc³⁺ ions serve as the spin impurity and hole vacancy, respectively.

Original language	English
Pages (from-to)	1280-1283
Number of pages	4
Journal	journal of the physical society of japan
Volume	71
Issue number	5
DOIs	https://doi.org/10.1143/JPSJ.71.1280
Publication status	Published - 2002 May 1
Externally published	Yes

Keywords

Charge ordering
Electron microscopy
Impurity effect
Perovskite manganites

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Charge Ordered State in the Impurity-Doped Manganites",

abstract = "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 (Nd0.5Ca0.5Mn1-yCryO3), 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 20 K. On the other hand, the Sc-doped manganites (Nd 0.5Ca0.5Mn1-ySCy-O3) 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 Cr3+ and Sc3+ ions serve as the spin impurity and hole vacancy, respectively.",

keywords = "Charge ordering, Electron microscopy, Impurity effect, Perovskite manganites",

author = "S. Mori and R. Shoji and N. Yamamoto and A. Machida and Y. Moritomo and T. Katsufuji",

year = "2002",

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doi = "10.1143/JPSJ.71.1280",

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T1 - Charge Ordered State in the Impurity-Doped Manganites

AU - Mori, S.

AU - Shoji, R.

AU - Yamamoto, N.

AU - Machida, A.

AU - Moritomo, Y.

AU - Katsufuji, T.

PY - 2002/5/1

Y1 - 2002/5/1

N2 - 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 (Nd0.5Ca0.5Mn1-yCryO3), 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 20 K. On the other hand, the Sc-doped manganites (Nd 0.5Ca0.5Mn1-ySCy-O3) 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 Cr3+ and Sc3+ ions serve as the spin impurity and hole vacancy, respectively.

AB - 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 (Nd0.5Ca0.5Mn1-yCryO3), 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 20 K. On the other hand, the Sc-doped manganites (Nd 0.5Ca0.5Mn1-ySCy-O3) 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 Cr3+ and Sc3+ ions serve as the spin impurity and hole vacancy, respectively.

KW - Charge ordering

KW - Electron microscopy

KW - Impurity effect

KW - Perovskite manganites

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