Magnetic and dielectric properties of InFe2O4, InFeCuO4, and InGaCuO4

Kenji Yoshii, Naoshi Ikeda, Yuka Okajima, Yasuhiro Yoneda, Yoji Matsuo, Yoichi Horibe, Shigeo Mori

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The magnetic and dielectric properties of InFe2O4, InFeCuO4, and InGaCuO4 have been investigated. All these materials are isostructural with RFe2O4 (R = Y, Ho-Lu), which shows ferroelectricity due to iron-valence ordering. InFe 2O4 exhibits ferrimagnetic ordering at Tc ∼ 242 K and a dielectric constant (ε) of ∼10000 at around room temperature. These properties resemble those of RFe2O4; the origins of the magnetic and dielectric phenomena are likely common in InFe2O4 and RFe2O4. From measurements of the other two materials, we found that both Tc and ε are decreased in the order of InFe2O4, InFeCuO 4, and InGaCuO4. This result strongly supports the previously reported explanation based on an electron transfer between the Fe-site ions for the corresponding rare-earth systems. Therefore, we propose that the dielectric properties of the oxides isostructural with AFe 2O4 are plausibly governed by electron transfer; this situation is different from that of ordinary ferroelectrics and dielectrics, in which the displacement of cations and anions is important. In addition, InFeCuO4 and InGaCuO4 exhibit large ε values (δ > ∼1500). In consideration of this property, we discuss the possible applications of these oxides.

Original languageEnglish
Pages (from-to)6493-6501
Number of pages9
JournalInorganic Chemistry
Volume47
Issue number14
DOIs
Publication statusPublished - Jul 21 2008

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Dielectric properties
Oxides
dielectric properties
Magnetic properties
electron transfer
magnetic properties
Ferroelectricity
oxides
Electrons
ferroelectricity
Rare earths
Ferroelectric materials
Anions
Cations
Permittivity
rare earth elements
Iron
Ions
permittivity
anions

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Yoshii, K., Ikeda, N., Okajima, Y., Yoneda, Y., Matsuo, Y., Horibe, Y., & Mori, S. (2008). Magnetic and dielectric properties of InFe2O4, InFeCuO4, and InGaCuO4 Inorganic Chemistry, 47(14), 6493-6501. https://doi.org/10.1021/ic702365k

Magnetic and dielectric properties of InFe2O4, InFeCuO4, and InGaCuO4 . / Yoshii, Kenji; Ikeda, Naoshi; Okajima, Yuka; Yoneda, Yasuhiro; Matsuo, Yoji; Horibe, Yoichi; Mori, Shigeo.

In: Inorganic Chemistry, Vol. 47, No. 14, 21.07.2008, p. 6493-6501.

Research output: Contribution to journalArticle

Yoshii, K, Ikeda, N, Okajima, Y, Yoneda, Y, Matsuo, Y, Horibe, Y & Mori, S 2008, 'Magnetic and dielectric properties of InFe2O4, InFeCuO4, and InGaCuO4 ', Inorganic Chemistry, vol. 47, no. 14, pp. 6493-6501. https://doi.org/10.1021/ic702365k
Yoshii K, Ikeda N, Okajima Y, Yoneda Y, Matsuo Y, Horibe Y et al. Magnetic and dielectric properties of InFe2O4, InFeCuO4, and InGaCuO4 Inorganic Chemistry. 2008 Jul 21;47(14):6493-6501. https://doi.org/10.1021/ic702365k
Yoshii, Kenji ; Ikeda, Naoshi ; Okajima, Yuka ; Yoneda, Yasuhiro ; Matsuo, Yoji ; Horibe, Yoichi ; Mori, Shigeo. / Magnetic and dielectric properties of InFe2O4, InFeCuO4, and InGaCuO4 In: Inorganic Chemistry. 2008 ; Vol. 47, No. 14. pp. 6493-6501.
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AU - Matsuo, Yoji

AU - Horibe, Yoichi

AU - Mori, Shigeo

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AB - The magnetic and dielectric properties of InFe2O4, InFeCuO4, and InGaCuO4 have been investigated. All these materials are isostructural with RFe2O4 (R = Y, Ho-Lu), which shows ferroelectricity due to iron-valence ordering. InFe 2O4 exhibits ferrimagnetic ordering at Tc ∼ 242 K and a dielectric constant (ε) of ∼10000 at around room temperature. These properties resemble those of RFe2O4; the origins of the magnetic and dielectric phenomena are likely common in InFe2O4 and RFe2O4. From measurements of the other two materials, we found that both Tc and ε are decreased in the order of InFe2O4, InFeCuO 4, and InGaCuO4. This result strongly supports the previously reported explanation based on an electron transfer between the Fe-site ions for the corresponding rare-earth systems. Therefore, we propose that the dielectric properties of the oxides isostructural with AFe 2O4 are plausibly governed by electron transfer; this situation is different from that of ordinary ferroelectrics and dielectrics, in which the displacement of cations and anions is important. In addition, InFeCuO4 and InGaCuO4 exhibit large ε values (δ > ∼1500). In consideration of this property, we discuss the possible applications of these oxides.

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