2007 Fiscal Year Final Research Report Summary
Multiferoic properties of rare-earth iron oxides with frustrated charge interactions
Project/Area Number |
18550136
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Functional materials chemistry
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Research Institution | Japan Atomic Energy Agency |
Principal Investigator |
YOSHII Kenji Japan Atomic Energy Agency, Quantum Beam Science Directorate, Researcher (90354985)
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Co-Investigator(Kenkyū-buntansha) |
IKEDA Naoshi Okayama University, Department of Physics, Professor (00222894)
MORI Shigeo Osaka Prefecture University, Department of Engineering, Professor (20251613)
YONEDA Yasuhiro Japan Atomic Energy Agency, Researcher (30343924)
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Project Period (FY) |
2006 – 2007
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Keywords | magnetic property / dielectric property / multiferroic / frustration |
Research Abstract |
The magnetic and dielectric properties of YbFe_2O_4 have been investigated., as its dielectric properties have not been reported so far The material showed a magnetic transition temperature of 250 K and dielectric constants of about 10000, both of which are close to those of the other RFe_2O_4 oxides (R: rare earths). This oxide can be prepared from the low-cost starting material of Yb_2O_3; accordingly, YbFe_2O_4 is suitable for practical application We have also started a research to find the optimum synthesis condition of YbFe_2O_4 changing a CO/CO_2 flow ratio. This study is currently under way mainly by magnetization measurements. In addition, the magnetic and dielectric properties of the Fe-site substituted oxides have been investigated. It was found that the dielectric constant was decreased in the order of RFe_2O_4, RFeCoO_4, RFeCuO_4, and RGaCuO_4. In consideration of the results from magnetic measurements, this result was explained in connection with the electron transfer between the Fe-site ions. Thus, we proposed that the dielectric response of the RFe_2O_4-type oxides has the origin different from that of ordinary ferroelectrics and dielectrics, in which the displacement of cations and anions plays a central role. Electron transfer was found to be likely important in a few other transition-metal oxides, such as R_2RuNiO_6 and R_<0.5>Ca_<0.5>MnO_3 (R; rare earths). In the latter system, the activation energy in the dielectric response was close to that of the transfer of Mn-3d electrons, suggesting a correlation between the dielectric response and the electron transfer. It was also found that these oxides showed small activation energies to rotate the polar retions. This fact implies that their dielectric response is weakly coupled to the lattice distortion, and offers a possibility of fabricating fatigue-free devices using these materials.
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[Journal Article] Electronic structure and magnetism of CaMn_1-xRu_xO_3 thin films2007
Author(s)
K. Terai, K. Yoshii, Y. Takeda, S,-i. Fujimori, Y. Saitoh, K. Ohwada, T. Inami, T. Okane, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, K. Kobayashi, M. Kobayashi and A. Fujimori
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Journal Title
J. Mag. Mag. Mater. 310
Pages: 1070-1072
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Soft x-ray magnetic circular dichroism study of Ca_1-xSr_xRuO_3 across the ferromagnetic quantum phase transition2007
Author(s)
J. Okamoto, T. Okane, Y. Saitoh, K. Terai, S.-I. Fujimori, Y. Muramatsu, K. Yoshii, K. Mamiya, T. Koide, A. Fujimori, Z. Fang, Y. Takeda, and M. Takano
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Journal Title
Phys. Rev. B 76
Pages: 184441(1-5)
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] X-ray magnetic circular dichroism and photoemission studies of ferromagnetism in CaMn_1-xRu_xO_3 thin films2007
Author(s)
K. Terai, K. Yoshii, Y. Takeda, S. I. Fujimori, Y. Saitoh, K. Ohwada, T. Inami, and T. Okane, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, K. Kobayashi, M. Kobayashi and A. Fujimori
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Journal Title
Phys. Rev.B 77
Pages: 115128(1-6)
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Magnetic and dielectric behavior of Magnetic and Dielectric Behaviro of the Ruthenium Double Perovskite Oxides R2_MRuO_6(R=La, Pr and Nd, M=Mg, Co, Ni and Zn)2007
Author(s)
K. Yoshii, N. Ikeda, S. Mori, Y. Yoneda, M. Mizumaki, H. Tanida, N. Kawamura
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Journal Title
Trans. Mater. Res. Soc. Jpn. 32
Pages: 51-54
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Electronic structure and magnetism of CaMn_<1-x>Ru_xO_3 thin films2007
Author(s)
K. Terai, K. Yoshii, Y. Takeda, S, -i. Fujimori, Y. Saitoh, K. Ohwada, T. Inami, T. Okane, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, K. Kobayashi, M.Kobayshi, A. Fujimori
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Journal Title
J. Mag. Mag. Mater. 310
Pages: 1070-1072
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Soft x-ray magnetic circular dichroism study of Ca_<1-x>Sr_xRuO_3 across the ferromagnetic quantum phase transition2007
Author(s)
J. Okamoto, T. Okane, Y. Saitoh, K. Terai, S. -I. Fujimori, Y. Muramatsu, K. Yoshii, K. Mamiya, T. Koide, A. Fujimori, Z. Fang, Y. Takeda, M.Takano
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Journal Title
Phys. Rev. B76
Pages: 184441(1-5)
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] X-ray magnetic circular dichroism and photoemission studies of ferromagnetism in CaMn_<1-x>Ru_xO_3 thin films2007
Author(s)
K. Terai, K. Yoshii, Y. takeda, S. I. Fujimori, Y. Saitoh, K. Ohwada, T. Inami, T. Okane, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, K. Kobayashi, M. Kobayashi, A. Fujimori
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Journal Title
Phys. Rev. B77
Pages: 115128(1-6)
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Structural relations between two groud states of Na V_2O_5 under high pressure : A synchrotron x-ray diffraction study2007
Author(s)
K. Ohwada, Y. Fujii, J. Muraoka, H. Nakao, Y. Murakami, Y. Noda, H. Ohsumi, N. Ikeda, T. Shobu, M. Isobe, Y. Ueda
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Journal Title
Phys. Rev. B76
Pages: 094113(1-10)
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Resonant X-ray Scattering Study at Y K-edge in Y_<1-x>CaxTiO_32006
Author(s)
H. Nakao, S. Kodama, K. Kiyoto, Y. Murakami, M. Tsubota, F. Iga, K. Uchihira, T. Takabatake, H. Ohsumi, M. Mizumaki, N. Ikeda
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Journal Title
J. Phys. Soc. Jpn. 75
Pages: 094706(1-5)
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Relation between ferroelectric and antiferromagnetic order in RMn_2O_52006
Author(s)
Y. Noda, H. Kimura, Y. Kamada, T. Osawa, Y. Fukuda, Y. Ishikawa, S. Kobayashi, Y. Wakabayashi, H. Sawa, N. Ikeda, K. Kohn
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Journal Title
Physica B 385-386
Pages: 119-122
Description
「研究成果報告書概要(欧文)」より
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[Presentation] θ-(BEDT-TTF)_2RbZn(SCN)_4の超急冷相での変調構造2008
Author(s)
山本健一郎,花咲徳亮,野上由夫,柿沼光之,横田研太郎,池田直,神戸高志,渡邉真史,野田幸男,寺崎一郎,稲田太一,森初果,森健彦,伊藤崇芳,豊川秀訓,大隅寛幸
Organizer
日本物理学会第63回年次大会
Place of Presentation
大阪 近畿大学
Year and Date
2008-03-24
Description
「研究成果報告書概要(和文)」より
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[Presentation] Modulated structure of θ-(BEDT_TTF) _2RbZn(Scn) _4 in the quenching phase2008
Author(s)
K. Yamamoto, N. Hanasaki, Y. Nogami, T. Kakinuma, K. Yokota, N. Ikeda, t. Kanbe, M. Watanabe, Y. Noda, I. Terasaki, t. Inada, H. Mori, T. Mori, T. Ito, H. Toyokawa, H. Ohsumi
Organizer
63rd Annual Meeting of the Physical Society of Japan
Place of Presentation
Osaka
Year and Date
2008-03-24
Description
「研究成果報告書概要(欧文)」より
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[Presentation] o-TaS_3における電場誘起ディスコメンシュレーション2008
Author(s)
稲垣克彦,坪田雅功,東山和樹,市村晃一,丹田聡,山本健一郎,花咲徳亮,池田直,野上由夫,伊藤崇芳,豊川秀訓
Organizer
日本物理学会第63回年次大会
Place of Presentation
大阪 近畿大学
Year and Date
2008-03-23
Description
「研究成果報告書概要(和文)」より
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[Presentation] Field-induced discommensuration in o-Tas_32008
Author(s)
K. Inagaki, M. Tsubota, K. Higashiyama, K. Ichimura, S. Tanda, K. Yamamoto N. Hanasaki, N. Ikeda, Y. Nogami, T. Ito, H. Toyokawa
Organizer
63rd Annual Meeting of the Physical Society of Japan
Place of Presentation
Osaka
Year and Date
2008-03-23
Description
「研究成果報告書概要(欧文)」より
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[Presentation] RFe_2O_4の電場応答12007
Author(s)
池田直,横田祐輔,道内尊正,森茂生,吉井賢資
Organizer
日本物理学会第62回年次大会
Place of Presentation
札幌 北海道大学
Year and Date
2007-09-24
Description
「研究成果報告書概要(和文)」より
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[Presentation] Electric Fiedl Response of Rfe_2O_42007
Author(s)
N. Ikeda, Y. Yokota, T. Michiuchi, S. Mori, Y. Matsuo, K. Yoshii
Organizer
62nd Annual Meeting of the Physical Society of Japan
Place of Presentation
Sapporo
Year and Date
2007-09-24
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 時間分割2次元ディテクタを用いたθ-(BEDT-TTF)_2CsZn(SCN)_4の電流下X線回折実験2007
Author(s)
渡邉真史,山本健一郎,伊藤崇芳,花咲徳亮,池田直,野上由夫,豊川秀訓,野田幸男,稲田太一,須子友博,寺崎一郎,森初果,森健彦
Organizer
日本物理学会第62回年次大会
Place of Presentation
札幌 北海道大学
Year and Date
2007-09-21
Description
「研究成果報告書概要(和文)」より
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[Presentation] X-ray diffraction experiment for θ-(BEDT-TTF) _2CsZn(SCN) _4 using the time -resolved 2D-detector under electric current pulse2007
Author(s)
M. Watanabe, K. Yamamoto, T. Ito, N. Hanasaki, N. Ikeda, Y. Nogami, H. Toyokawa Y. Noda, T. Inada, T. Suko, I. Terasaki, H. Mori, T. Mori
Organizer
62nd Annual Meeting of the Physical Society of Japan
Place of Presentation
Sapporo
Year and Date
2007-09-21
Description
「研究成果報告書概要(欧文)」より
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[Presentation] θ-(BEDT-TTF)_2CsZn(SCN)_4の非線形伝導と巨大格子変形2007
Author(s)
渡邉真史,山本健一郎,中島悠策,伊藤崇芳,田辺誠,花咲徳亮,池田直,野上由夫,豊川秀訓,野田幸男,寺崎一郎,澤野文章,須子友博,森初果,森健彦
Organizer
日本物理学会2007年春季大会
Place of Presentation
鹿児島 鹿児島大学
Year and Date
2007-03-21
Description
「研究成果報告書概要(和文)」より
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[Presentation] Giant lattice variaation in θ-(BEDT-TTF) _2CsZn(SCN) _4 in nonlinear conducting state2007
Author(s)
M. Watanabe, K. Yamamoto, Y. Nakashima, T. Ito, M. Tanabe, N. Hanasaki, N. Ikeda, Y. Nogami, H. Toyokawa, Y. Noda, I, Terasaki, F. Sawano, T. Suko, H. Mori, T. Mori
Organizer
2007 Spring Meeting of the Physical Society of Japan
Place of Presentation
Kagoshima
Year and Date
2007-03-21
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Magnetic and dielectric behaviro of the ruthenium double perovskite oxides Ln_2MRuO_6(Ln=La, Pr and Nd, M=Mg, Co, Ni and Zn)2006
Author(s)
K. Yoshii, N. Ikeda, S. Mori, Y. Yoneda, M. Mizumaki, H. Tanida, N. Kawamura
Organizer
17th MRS-J Academic Symposium
Place of Presentation
Tokyo
Year and Date
2006-12-10
Description
「研究成果報告書概要(欧文)」より
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[Presentation] ドメイン観察手段としてのコヒーレントX線回折2006
Author(s)
大和田謙二,並河一道,水木純一郎,下村晋,伊藤和輝,中尾裕則,村上洋一,米田安宏,松下三芳
Organizer
第17回日本MRS学術シンポジウム
Place of Presentation
東京 日大駿河台キャンパス
Year and Date
2006-12-09
Description
「研究成果報告書概要(和文)」より
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[Presentation] 非線形電気伝導状態におけるθ-(BEDT-TTF)_2CsZn(SCN)_4の格子変形2006
Author(s)
渡邉真史,伊藤崇芳,山本健一郎,中島悠策,花咲徳亮,池田直,野上由夫,大隅寛之,豊川秀訓,野田幸男,寺崎一郎,澤野文章,須子友博,森初果,森健彦
Organizer
日本物理学会 2006年秋季大会
Place of Presentation
千葉 千葉大学
Year and Date
2006-09-25
Description
「研究成果報告書概要(和文)」より
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[Presentation] Lattice variation ofθ-(BEDT-TTF) _2CsZN(SCN) _4 in molecular conduction state2006
Author(s)
M. Watanabe, T. Ito, K. yamamoto, Y. Nakashima, N. Hanasaki, N. Ikeda Y. Nogami, H. Ohsumi, H. Toyokawa, Y. Noda, I. Terasaki, F. Sawano, T. Suko, H. Mori, T. Mori
Organizer
2006 Fall Meeting of the Physical Society of Japan
Place of Presentation
Chiba
Year and Date
2006-09-25
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Electronic structure and magnetism of CaMn_1-xRu_xO_3 thin films2006
Author(s)
K. Terai, K. Yoshii, Y. Takeda, S,-i. Fujimori, Y. Saitoh, K. Ohwada, T. Inami, T. Okane, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, K. Kobayashi, M. Kobayashi and A. Fujimori
Organizer
International Conference on Magnetism 2006
Place of Presentation
京都 京都国際会館
Year and Date
2006-08-25
Description
「研究成果報告書概要(和文)」より
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[Presentation] Electronic structure and magnetism of CaMn_<1-x>Ru_xO_3 thin films2006
Author(s)
K. Terai, K. Yoshii, Y. Takeda, S, -i. Fujimori, Y. Saitoh, K. Ohwada, T. Inami, T. Okane, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, K. Kobayashi, M. Kobayashi, A. Fujimori
Organizer
International Conference on Magnetism 2006
Place of Presentation
Kyoto
Year and Date
2006-08-25
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Magnetic ordering process in the charge-frustrated ferroelectric system LuFe_2O_42006
Author(s)
K. Kakurai, N. Ikeda, S. Nagai, M. Matsuda, Y. Ishii, K. Ohwada, T. Inami, K. Yoshii, Y. Murakami, H. Kito, Y. yamada
Organizer
International Conference on Magnetism 2006
Place of Presentation
Kyoto
Year and Date
2006-08-24
Description
「研究成果報告書概要(欧文)」より
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