Neutron Investigation of Tb1-xCaxMnO3 (x ≥ 0.5)

Akihiko Machida; Yutaka Moritomo; Kenji Ohoyama; Arao Nakamura

doi:10.1143/JPSJ.70.3739

Neutron Investigation of Tb_1-xCa_xMnO₃ (x ≥ 0.5)

Akihiko Machida, Yutaka Moritomo, Kenji Ohoyama, Arao Nakamura

Institute for Materials Research (IMR)

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

13 Citations (Scopus)

Abstract

Crystal and magnetic structures of Tb_1-xCa_xMnO₃ (x ≥ 0.5) have been investigated by means of neutron powder diffraction experiments. We have derived the magnetic phase diagram against hole concentration x and temperature T: the spin structure changes as CE- → C- → G-type structure with increase of x. In the vicinity of the magnetic phase boundaries, magnetically phase separated state has been observed. At high temperature region, we observe the metallic behavior in a wide x region (0.70 ≤ x ≤ 0.95), and ascribe it to the enhanced one-electron bandwidth W of the e_g state.

Original language	English
Pages (from-to)	3739-3746
Number of pages	8
Journal	journal of the physical society of japan
Volume	70
Issue number	12
DOIs	https://doi.org/10.1143/JPSJ.70.3739
Publication status	Published - 2001 Dec 1

Keywords

Magnetic phase diagram
Neutron powder diffraction
Perovskite-type manganites

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.70.3739

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AU - Machida, Akihiko

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AU - Ohoyama, Kenji

AU - Nakamura, Arao

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N2 - Crystal and magnetic structures of Tb1-xCaxMnO3 (x ≥ 0.5) have been investigated by means of neutron powder diffraction experiments. We have derived the magnetic phase diagram against hole concentration x and temperature T: the spin structure changes as CE- → C- → G-type structure with increase of x. In the vicinity of the magnetic phase boundaries, magnetically phase separated state has been observed. At high temperature region, we observe the metallic behavior in a wide x region (0.70 ≤ x ≤ 0.95), and ascribe it to the enhanced one-electron bandwidth W of the eg state.

AB - Crystal and magnetic structures of Tb1-xCaxMnO3 (x ≥ 0.5) have been investigated by means of neutron powder diffraction experiments. We have derived the magnetic phase diagram against hole concentration x and temperature T: the spin structure changes as CE- → C- → G-type structure with increase of x. In the vicinity of the magnetic phase boundaries, magnetically phase separated state has been observed. At high temperature region, we observe the metallic behavior in a wide x region (0.70 ≤ x ≤ 0.95), and ascribe it to the enhanced one-electron bandwidth W of the eg state.

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