Phase separation and destabilization of the charge-ordered state in Cr-doped manganites

Ryuichi Shoji; Shigeo Mori; Naoki Yamamoto; Akihiko Machida; Yutaka Moritomo; Takuro Katsufuji

doi:10.1143/JPSJ.70.267

Phase separation and destabilization of the charge-ordered state in Cr-doped manganites

Ryuichi Shoji, Shigeo Mori, Naoki Yamamoto, Akihiko Machida, Yutaka Moritomo, Takuro Katsufuji

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

20 Citations (Scopus)

Abstract

Destabilization of the charge-ordered (CO) state in half-doped manganites by chromium (Cr) doping in the manganese (Mn) sites was investigated. The Cr doping in the half-doped manganites makes the CO state short-ranged and induces new ferromagnetic metallic (FMM) phase at low temperature. Real space images taken in the CO state by electron microscope clearly show coexistence of the short-ranged CO and FMM states, which is characterized as a microscopicscale phase separation. Furthermore, the CO state in the Cr-doped manganites has a superlattice structure with the incommensurate wave vector q = (1/2 - ε)a*_o, where ε depends on the Cr concentration. These results suggest that the Cr doping suppresses the incommensurate to commensurate structural transition found in the half-doped manganites and produces new FMM phase.

Original language	English
Pages (from-to)	267-271
Number of pages	5
Journal	journal of the physical society of japan
Volume	70
Issue number	1
DOIs	https://doi.org/10.1143/JPSJ.70.267
Publication status	Published - 2001 Jan 1
Externally published	Yes

Keywords

Charge ordering
Impurity effect
Perovskite manganites

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Phase separation and destabilization of the charge-ordered state in Cr-doped manganites",

abstract = "Destabilization of the charge-ordered (CO) state in half-doped manganites by chromium (Cr) doping in the manganese (Mn) sites was investigated. The Cr doping in the half-doped manganites makes the CO state short-ranged and induces new ferromagnetic metallic (FMM) phase at low temperature. Real space images taken in the CO state by electron microscope clearly show coexistence of the short-ranged CO and FMM states, which is characterized as a microscopicscale phase separation. Furthermore, the CO state in the Cr-doped manganites has a superlattice structure with the incommensurate wave vector q = (1/2 - ε)a*o, where ε depends on the Cr concentration. These results suggest that the Cr doping suppresses the incommensurate to commensurate structural transition found in the half-doped manganites and produces new FMM phase.",

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

author = "Ryuichi Shoji and Shigeo Mori and Naoki Yamamoto and Akihiko Machida and Yutaka Moritomo and Takuro Katsufuji",

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T1 - Phase separation and destabilization of the charge-ordered state in Cr-doped manganites

AU - Shoji, Ryuichi

AU - Mori, Shigeo

AU - Yamamoto, Naoki

AU - Machida, Akihiko

AU - Moritomo, Yutaka

AU - Katsufuji, Takuro

PY - 2001/1/1

Y1 - 2001/1/1

N2 - Destabilization of the charge-ordered (CO) state in half-doped manganites by chromium (Cr) doping in the manganese (Mn) sites was investigated. The Cr doping in the half-doped manganites makes the CO state short-ranged and induces new ferromagnetic metallic (FMM) phase at low temperature. Real space images taken in the CO state by electron microscope clearly show coexistence of the short-ranged CO and FMM states, which is characterized as a microscopicscale phase separation. Furthermore, the CO state in the Cr-doped manganites has a superlattice structure with the incommensurate wave vector q = (1/2 - ε)a*o, where ε depends on the Cr concentration. These results suggest that the Cr doping suppresses the incommensurate to commensurate structural transition found in the half-doped manganites and produces new FMM phase.

AB - Destabilization of the charge-ordered (CO) state in half-doped manganites by chromium (Cr) doping in the manganese (Mn) sites was investigated. The Cr doping in the half-doped manganites makes the CO state short-ranged and induces new ferromagnetic metallic (FMM) phase at low temperature. Real space images taken in the CO state by electron microscope clearly show coexistence of the short-ranged CO and FMM states, which is characterized as a microscopicscale phase separation. Furthermore, the CO state in the Cr-doped manganites has a superlattice structure with the incommensurate wave vector q = (1/2 - ε)a*o, where ε depends on the Cr concentration. These results suggest that the Cr doping suppresses the incommensurate to commensurate structural transition found in the half-doped manganites and produces new FMM phase.

KW - Charge ordering

KW - Impurity effect

KW - Perovskite manganites

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