Magnetic and dielectric properties of Tb0.5Ca 0.5MnO3

Yusuke Hiramitsu; Kenji Yoshii; Yasuhiro Yoneda; Jun'ichiro Mizuki; Akio Nakamura; Yutaka Shimojo; Yoshinobu Ishii; Yukio Morii; Naoshi Ikeda

doi:10.1143/JJAP.46.7171

Magnetic and dielectric properties of Tb_0.5Ca _0.5MnO₃

Yusuke Hiramitsu, Kenji Yoshii, Yasuhiro Yoneda, Jun'ichiro Mizuki, Akio Nakamura, Yutaka Shimojo, Yoshinobu Ishii, Yukio Morii, Naoshi Ikeda

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

16 Citations (Scopus)

Abstract

The magnetic and dielectric properties of a perovskite manganite Tb _0.5Ca_0.5MnO₃ were investigated. Magnetic measurements showed three characteristic temperatures, originating from charge ordering (∼300K), antiferromagnetic ordering (∼ 120 K), and a transition to a glassy state (∼50K). The coexistence of the charge and antiferromagnetic orderings was confirmed by powder neutron diffraction. AC dielectric measurements showed large dielectric constants larger than ∼ 1000 at approximately room temperature. The temperature dependence of the dielectric constant changed just below the charge-ordering temperature. From the analysis of tan δ, the activation energy for switching the directions of polar regions was calculated to be ∼0.09eV, which is close to the activation energy of the Mn 3d electron transfer. These results strongly suggest that the dielectric properties of this material are governed by the ordering and transfer of the Mn 3d charges.

Original language	English
Pages (from-to)	7171-7174
Number of pages	4
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	46
Issue number	10 B
DOIs	https://doi.org/10.1143/JJAP.46.7171
Publication status	Published - Oct 22 2007

Keywords

Charge ordering
Dielectric property
Magnetic property
Multlferroic
Perovskite

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Access to Document

10.1143/JJAP.46.7171

Cite this

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title = "Magnetic and dielectric properties of Tb0.5Ca 0.5MnO3",

abstract = "The magnetic and dielectric properties of a perovskite manganite Tb 0.5Ca0.5MnO3 were investigated. Magnetic measurements showed three characteristic temperatures, originating from charge ordering (∼300K), antiferromagnetic ordering (∼ 120 K), and a transition to a glassy state (∼50K). The coexistence of the charge and antiferromagnetic orderings was confirmed by powder neutron diffraction. AC dielectric measurements showed large dielectric constants larger than ∼ 1000 at approximately room temperature. The temperature dependence of the dielectric constant changed just below the charge-ordering temperature. From the analysis of tan δ, the activation energy for switching the directions of polar regions was calculated to be ∼0.09eV, which is close to the activation energy of the Mn 3d electron transfer. These results strongly suggest that the dielectric properties of this material are governed by the ordering and transfer of the Mn 3d charges.",

keywords = "Charge ordering, Dielectric property, Magnetic property, Multlferroic, Perovskite",

author = "Yusuke Hiramitsu and Kenji Yoshii and Yasuhiro Yoneda and Jun'ichiro Mizuki and Akio Nakamura and Yutaka Shimojo and Yoshinobu Ishii and Yukio Morii and Naoshi Ikeda",

year = "2007",

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T1 - Magnetic and dielectric properties of Tb0.5Ca 0.5MnO3

AU - Hiramitsu, Yusuke

AU - Yoshii, Kenji

AU - Yoneda, Yasuhiro

AU - Mizuki, Jun'ichiro

AU - Nakamura, Akio

AU - Shimojo, Yutaka

AU - Ishii, Yoshinobu

AU - Morii, Yukio

AU - Ikeda, Naoshi

PY - 2007/10/22

Y1 - 2007/10/22

N2 - The magnetic and dielectric properties of a perovskite manganite Tb 0.5Ca0.5MnO3 were investigated. Magnetic measurements showed three characteristic temperatures, originating from charge ordering (∼300K), antiferromagnetic ordering (∼ 120 K), and a transition to a glassy state (∼50K). The coexistence of the charge and antiferromagnetic orderings was confirmed by powder neutron diffraction. AC dielectric measurements showed large dielectric constants larger than ∼ 1000 at approximately room temperature. The temperature dependence of the dielectric constant changed just below the charge-ordering temperature. From the analysis of tan δ, the activation energy for switching the directions of polar regions was calculated to be ∼0.09eV, which is close to the activation energy of the Mn 3d electron transfer. These results strongly suggest that the dielectric properties of this material are governed by the ordering and transfer of the Mn 3d charges.

AB - The magnetic and dielectric properties of a perovskite manganite Tb 0.5Ca0.5MnO3 were investigated. Magnetic measurements showed three characteristic temperatures, originating from charge ordering (∼300K), antiferromagnetic ordering (∼ 120 K), and a transition to a glassy state (∼50K). The coexistence of the charge and antiferromagnetic orderings was confirmed by powder neutron diffraction. AC dielectric measurements showed large dielectric constants larger than ∼ 1000 at approximately room temperature. The temperature dependence of the dielectric constant changed just below the charge-ordering temperature. From the analysis of tan δ, the activation energy for switching the directions of polar regions was calculated to be ∼0.09eV, which is close to the activation energy of the Mn 3d electron transfer. These results strongly suggest that the dielectric properties of this material are governed by the ordering and transfer of the Mn 3d charges.

KW - Charge ordering

KW - Dielectric property

KW - Magnetic property

KW - Multlferroic

KW - Perovskite

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