Magnetodielectric effects in low-dimensional cobalt oxides

M. Akaki; F. Nakamura; D. Akahoshi; H. Kuwahara

doi:10.1016/j.physb.2007.10.178

Magnetodielectric effects in low-dimensional cobalt oxides

M. Akaki, F. Nakamura, D. Akahoshi, H. Kuwahara

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

4 Citations (Scopus)

Abstract

We have investigated the magnetic and dielectric properties of BaCo₂ Si₂ O₇ single crystal with a quasi-one-dimensional structure to explore novel magnetoelectric functionality. The Weiss temperatures estimated in paramagnetic region are - 20 K(H ∥ c) and - 74 K(H ⊥ c), indicating the large magnetic anisotropy due to the highly anisotropic structure. The weak ferromagnetic magnetization rises up at 21 K, where the dielectric constant perpendicular to the c-axis decreases concomitantly. In addition, we have observed the magnetocapacitance effect below 21 K. Δ ε{lunate} (H) / ε{lunate} (0) reaches 0.2% at 5.5 K. These results suggest that there exists a substantial coupling between magnetism and dielectricity.

Original language	English
Pages (from-to)	1505-1507
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	403
Issue number	5-9
DOIs	https://doi.org/10.1016/j.physb.2007.10.178
Publication status	Published - 2008 Apr 1
Externally published	Yes

Keywords

Antiferromagnetism
Magnetoelectric effect

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/j.physb.2007.10.178

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title = "Magnetodielectric effects in low-dimensional cobalt oxides",

abstract = "We have investigated the magnetic and dielectric properties of BaCo2 Si2 O7 single crystal with a quasi-one-dimensional structure to explore novel magnetoelectric functionality. The Weiss temperatures estimated in paramagnetic region are - 20 K(H ∥ c) and - 74 K(H ⊥ c), indicating the large magnetic anisotropy due to the highly anisotropic structure. The weak ferromagnetic magnetization rises up at 21 K, where the dielectric constant perpendicular to the c-axis decreases concomitantly. In addition, we have observed the magnetocapacitance effect below 21 K. Δ ε{lunate} (H) / ε{lunate} (0) reaches 0.2% at 5.5 K. These results suggest that there exists a substantial coupling between magnetism and dielectricity.",

keywords = "Antiferromagnetism, Magnetoelectric effect",

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T1 - Magnetodielectric effects in low-dimensional cobalt oxides

AU - Akaki, M.

AU - Nakamura, F.

AU - Akahoshi, D.

AU - Kuwahara, H.

PY - 2008/4/1

Y1 - 2008/4/1

N2 - We have investigated the magnetic and dielectric properties of BaCo2 Si2 O7 single crystal with a quasi-one-dimensional structure to explore novel magnetoelectric functionality. The Weiss temperatures estimated in paramagnetic region are - 20 K(H ∥ c) and - 74 K(H ⊥ c), indicating the large magnetic anisotropy due to the highly anisotropic structure. The weak ferromagnetic magnetization rises up at 21 K, where the dielectric constant perpendicular to the c-axis decreases concomitantly. In addition, we have observed the magnetocapacitance effect below 21 K. Δ ε{lunate} (H) / ε{lunate} (0) reaches 0.2% at 5.5 K. These results suggest that there exists a substantial coupling between magnetism and dielectricity.

AB - We have investigated the magnetic and dielectric properties of BaCo2 Si2 O7 single crystal with a quasi-one-dimensional structure to explore novel magnetoelectric functionality. The Weiss temperatures estimated in paramagnetic region are - 20 K(H ∥ c) and - 74 K(H ⊥ c), indicating the large magnetic anisotropy due to the highly anisotropic structure. The weak ferromagnetic magnetization rises up at 21 K, where the dielectric constant perpendicular to the c-axis decreases concomitantly. In addition, we have observed the magnetocapacitance effect below 21 K. Δ ε{lunate} (H) / ε{lunate} (0) reaches 0.2% at 5.5 K. These results suggest that there exists a substantial coupling between magnetism and dielectricity.

KW - Antiferromagnetism

KW - Magnetoelectric effect

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Magnetodielectric effects in low-dimensional cobalt oxides

Abstract

Keywords

ASJC Scopus subject areas

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