Neutron investigation of Ru-doped Nd1/2Ca1/2MnO 3 - Comparison with Cr-doped Nd1/2Ca1/2MnO 3

Yutaka Moritomo; Akihiko Machidai; Toshihiko Nonobe; Kenji Ohoyama

doi:10.1143/JPSJ.71.1626

Neutron investigation of Ru-doped Nd_1/2Ca_1/2MnO ₃ - Comparison with Cr-doped Nd_1/2Ca_1/2MnO ₃

Yutaka Moritomo, Akihiko Machidai, Toshihiko Nonobe, Kenji Ohoyama

Institute for Materials Research (IMR)

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

10 Citations (Scopus)

Abstract

Lattice and magnetic properties are investigated for 3% Ru- and Cr-doped Nd_1/2Ca_1/2MnO₃. The parent Nd _1/2Ca_1/2MnO₃ is a charge-ordered insulator (T_CO = 250 K). With decreasing temperature below ≈210 K, these compounds are separated into two perovskite phases, that is, the long-c and short-c phases. The long-c region shows a ferromagnetic transition at T _C ≈ 210 K for the Ru-doped compound and ≈130 K for the Cr-doped compound, while the short-c region shows antiferromagnetic transition at T_N ≈ 150 K for Ru and ≈110 K for Cr. We discuss the origin of the enhanced Tc for the Ru-doped compound in terms of the effective one-electron bandwidth W of the e_g-band.

Original language	English
Pages (from-to)	1626-1629
Number of pages	4
Journal	journal of the physical society of japan
Volume	71
Issue number	7
DOIs	https://doi.org/10.1143/JPSJ.71.1626
Publication status	Published - 2002 Jul 1

Keywords

B-site substitution
Neutron powder diffraction
Perovskite manganite
Rietveld analysis

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.71.1626

Cite this

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title = "Neutron investigation of Ru-doped Nd1/2Ca1/2MnO 3 - Comparison with Cr-doped Nd1/2Ca1/2MnO 3",

abstract = "Lattice and magnetic properties are investigated for 3% Ru- and Cr-doped Nd1/2Ca1/2MnO3. The parent Nd 1/2Ca1/2MnO3 is a charge-ordered insulator (TCO = 250 K). With decreasing temperature below ≈210 K, these compounds are separated into two perovskite phases, that is, the long-c and short-c phases. The long-c region shows a ferromagnetic transition at T C ≈ 210 K for the Ru-doped compound and ≈130 K for the Cr-doped compound, while the short-c region shows antiferromagnetic transition at TN ≈ 150 K for Ru and ≈110 K for Cr. We discuss the origin of the enhanced Tc for the Ru-doped compound in terms of the effective one-electron bandwidth W of the eg-band.",

keywords = "B-site substitution, Neutron powder diffraction, Perovskite manganite, Rietveld analysis",

author = "Yutaka Moritomo and Akihiko Machidai and Toshihiko Nonobe and Kenji Ohoyama",

year = "2002",

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T1 - Neutron investigation of Ru-doped Nd1/2Ca1/2MnO 3 - Comparison with Cr-doped Nd1/2Ca1/2MnO 3

AU - Moritomo, Yutaka

AU - Machidai, Akihiko

AU - Nonobe, Toshihiko

AU - Ohoyama, Kenji

PY - 2002/7/1

Y1 - 2002/7/1

N2 - Lattice and magnetic properties are investigated for 3% Ru- and Cr-doped Nd1/2Ca1/2MnO3. The parent Nd 1/2Ca1/2MnO3 is a charge-ordered insulator (TCO = 250 K). With decreasing temperature below ≈210 K, these compounds are separated into two perovskite phases, that is, the long-c and short-c phases. The long-c region shows a ferromagnetic transition at T C ≈ 210 K for the Ru-doped compound and ≈130 K for the Cr-doped compound, while the short-c region shows antiferromagnetic transition at TN ≈ 150 K for Ru and ≈110 K for Cr. We discuss the origin of the enhanced Tc for the Ru-doped compound in terms of the effective one-electron bandwidth W of the eg-band.

AB - Lattice and magnetic properties are investigated for 3% Ru- and Cr-doped Nd1/2Ca1/2MnO3. The parent Nd 1/2Ca1/2MnO3 is a charge-ordered insulator (TCO = 250 K). With decreasing temperature below ≈210 K, these compounds are separated into two perovskite phases, that is, the long-c and short-c phases. The long-c region shows a ferromagnetic transition at T C ≈ 210 K for the Ru-doped compound and ≈130 K for the Cr-doped compound, while the short-c region shows antiferromagnetic transition at TN ≈ 150 K for Ru and ≈110 K for Cr. We discuss the origin of the enhanced Tc for the Ru-doped compound in terms of the effective one-electron bandwidth W of the eg-band.

KW - B-site substitution

KW - Neutron powder diffraction

KW - Perovskite manganite

KW - Rietveld analysis

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