Magnetoelecric relaxors

2010 Fiscal Year Final Research Report

• Project/Area Number: 20340078
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Osaka Prefecture University
• Principal Investigator: MORI Shigeo Osaka Prefecture University, 工学研究科, 教授 (20251613)
• Co-Investigator(Renkei-kenkyūsha): IKEDA Naoshi 岡山大学, 理学部, 教授 (00222894)
• Project Period (FY): 2008 – 2010
• Keywords: 磁性誘電体 / リラクサー / 電子顕微鏡 / ビスマスフェライト / BaTiO3 / ドメイン構造 / マルチフェロイック物質

Research Abstract

We have investigated magnetic and dielectric properties and related microstructures in (1-x)BiFeO_3-xBaTiO_3 solid solution using a transmission electron microscopy (TEM), in combination with conventional magnetic and dielectric measurements. Nano-sized domain structures in the cubic phase of (1-x)BiFeO_3-xBaTiO_3 with 0.33<x<0.60 were found. From high-resolution TEM observation, it is revealed that the cubic phase in 0.33<x<0.60 is characterized as nano-scaled coexisting state of the polar rhombohedral structure and the non-polar cubic one, which should be regarded as the psudo-cubic phase. On the other hand, both P-E hysteresis measurements and the TEM experiments revealed that the cubic phase without any distortion due to the coexisting state appears in the x=0.60 compound at room temperature. Our experimental findings suggested that (1-x)BiFeO_3-xBaTiO_3 is a good candidate materials showing a gigantic magnetoelectric effect as a magnetoelectric relaxor.

Research Products

• [Journal Article] Direct observation of ferromagnetic-domain network leading to colossal magnetoresistance (2010)
  • Author(s): Y. Murakami, H. Kasai, J.J. Kim, S. Mamishin, D. Shindo, S.Mori, A. Tonomura
  • Journal Title: Nature Nanotechnology Vol.5 Pages: 37-41
• [Journal Article] Oxygen-deficient effect on charge ordering in spin-and charge-frustrated ferrite YFe_2O_4-δ (2009)
  • Author(s): Y. Horibe, K.Yoshii, N.Ikeda, S.Mori
  • Journal Title: Phys.Rev. B80 Pages: 092104
• [Journal Article] Relaxor Pb(Mg_1/3Nb_2/3)O_3 : A ferroelectric withmultiple inhomogeneities (2009)
  • Author(s): D. Fu, H. Taniguchi, M. Itoh, S. Koshihara, N. Yamamoto, S.Mori
  • Journal Title: Phys.Rev.Lett. 103 Pages: 207601 1-4
• [Journal Article] Stoichiometric Study of the Dielectric and Magnetic Properties in Charge Frustrated System LuFe_2O_4 (2009)
  • Author(s): T. Michiuchi, Y. Yokota, T. Komatsu, H. Hayakawa, T. Kuroda, D. Maeda, Y.Matsuo, S.Mori, K.Yoshii, N. Hanasaki, T. Kambe, N.Ikeda
  • Journal Title: Ferroelectrics 378 Pages: 175
• [Journal Article] 希土類-鉄酸化物RFe_2O_4の示す新規な強誘電性(R=Y, Ho-Lu) (2009)
  • Author(s): 吉井賢資、池田直、松尾祥史、森茂生
  • Journal Title: 日本結晶学会誌 51,No.2 Pages: 162-168
• [Journal Article] Dielectric properties and related domain structures in 0.75BiFeO_3-0.25BaTiO_3 (2009)
  • Author(s): 尾崎友厚, 森茂生
  • Journal Title: Japanese Journal of Applied Physics 48 Pages: 09KC07-1-4
• [Journal Article] Structural characterization and dielectric properties in hexagonal Lu(Fe,Ti)O_3 (2009)
  • Author(s): Y.Matsuo, T. Hoshiyama, S.Mori, K.Yoshii, Y. Michiue, T. Kanbe, N.Ikeda, F. Brown, N. Kimizuka
  • Journal Title: Japanese Journal of Applied Physics 48 Pages: 09KB04-1-3
• [Journal Article] Magnetic and dielectric properties of YbFe_2-xMn_xO_4(0<x<1) (2009)
  • Author(s): K.Yoshii, N.Ikeda, T. Michiuchi, Y. Yokota, Y. Okajima, Y. Yoneda, Y.Matsuo, Y. Horibe, S.Mori
  • Journal Title: Journal of Solid State Chemistry 182 Pages: 1611-1618
• [Journal Article] Nanometer-sized domain structures in LuFeMO_4 (M=Cu,Co) revealed by energy-filtered transmission electron microscopy (2009)
  • Author(s): Y. Matuso, A. Hirata, Y. Horibe, K.Yoshii, N.Ikeda, S.Mori
  • Journal Title: Ferroelectrics 380 Pages: 56-62
• [Journal Article] Local Structure modulation in the electronic ferroelectric oxide LuFe_2O_4 (2009)
  • Author(s): H. Hayakawa, M. Morimoto, N.Ikeda, Y. Yoneda, S. Kohara, K.Yoshii, Y.Matsuo, T. Michiuchi, S.Mori
  • Journal Title: Transactions of the Materials Research Society of Japan 34[1] Pages: 51-54
• [Journal Article] Nano-sized domain structures in the psudocubic phase of (1-x)BiFeO_3-xBaTiO_3(0.33<x<0.60) (2009)
  • Author(s): T.Ozaki, S. Nishihara, Y. Hosokoshi, M. Suzuki, Y. Noguchi, M. Miyayama, S.Mori
  • Journal Title: Transactions of the Materials Research Society of Japan 34[1] Pages: 47-50
• [Journal Article] Ferromagnetic domain structures in Al-substituted La_1-xSr_xMnO_3 (2009)
  • Author(s): K. Yoshidome, Y. Nagamine, X. Xu, T. Asaka, Y. Matsui, K. Takenaka, S. Sugai, S.Mori
  • Journal Title: Transactions of the Materials Research Society of Japan 34[1] Pages: 55-58
• [Journal Article] (1-x)BiFeO_3-xBaTiO_3の磁気誘電特性と微細構造 (2009)
  • Author(s): 森茂生, 尾崎友厚, 喜多川修次
  • Journal Title: マテリアルインテグレーション Vol.22,No.02 Pages: 47-52
• [Journal Article] Two Types of Charge Ordering in the Half-Doped Manganites of Bi_0.5(Ca,Sr)_0.5MnO_3 (2009)
  • Author(s): Y. Horibe, J. Ahn, P. Sharma, S.Mori, C.H. Chen, S.J. Oh, S-W. Cheong
  • Journal Title: J.Phys.Soc.Jpn. 78 Pages: 044704
• [Journal Article] Local Structure of BiFeO_3-BaTiO_3 Mixture (2008)
  • Author(s): Y. Yoneda, K.Yoshii, S. Kohara, S.Kitagawa, S.Mori
  • Journal Title: Japanese Journal of Applied Physics 47 Pages: 7590-7594
• [Journal Article] Magnetic and dielectric properties of InFe_2O_4, InFeCuO_4 and InGaCuO_4 (2008)
  • Author(s): K. Yoshi, N.Ikeda, Y. Okajima, Y. Yoneda, Y.Matsuo, Y. Horibe, S.Mori
  • Journal Title: Inorganic Chemistry 47 Pages: 6493-6501
• [Journal Article] Electronic Ferroelectricity from Charge Ordering in RFe_2O_4 IEEE transactions on" ultrasonic (2008)
  • Author(s): 池田直, 松尾祥史, 森茂生, 吉井賢資
  • Journal Title: ferroelctrics and frequency control 55,No.5 Pages: 1043-1045
• [Journal Article] Ferroelectric Domain Structures in BiFeO_3-BaTiO_3 (2008)
  • Author(s): S.Kitagawa, T.Ozaki, Y. Horibe, K.Yoshii, S.Mori
  • Journal Title: Ferroelectrics 376 Pages: 122-128
• [Presentation] Multiferroic properties and related microstructures in BiFeO_3-BaTiO_3 (2011)
  • Author(s): T. Ozaki, S. Nishihara, Y. Noguchi, M. Miyayama, S. Mori
  • Organizer: International Conference of Frustration in Condensed Matter
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2011-01-11
• [Presentation] Domain Structures with Multiple Inhomogeneities in the Monoclinic Phase of 0.68Pb(Mg_1/3Nb_2/3)O_3-0.32PbTiO_3 (2010)
  • Author(s): S. Mori, K. Kurushima
  • Organizer: 3rd International Congress on Ceramics
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2010-11-10
• [Presentation] Dielectric properties and related microstructures in Mu-substituted YbFe_2O_4 (2010)
  • Author(s): K. Matsumoto, T. Hoshiyama, S. Mori, K. Yoshii, T. Kambe, N. Ikeda
  • Organizer: 3rd International Congress on Ceramics
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2010-11-10
• [Presentation] Magnetic nanoscale chessboard-type domain structures in the Mn-doped CoFe_2O_4 (2010)
  • Author(s): M. Ohno, Y. Togawa Y. Horibe, S. Mori
  • Organizer: 3rd International Congress on Ceramics
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2010-11-10
• [Presentation] Dielectric properties and related microstructures in (1-x)BiFeO_3-xRTiO_3 (R=Pb and Sr) (2010)
  • Author(s): R. Fujii, T. Ozaki, M. Soda, S. Mori
  • Organizer: 3rd International Congress on Ceramics
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2010-11-10
• [Presentation] Charge ordering phenomena in RFe_2O_4 (R=Y, Yb and Lu) (2010)
  • Author(s): S. Mori
  • Organizer: The 8^<th> Japan-Korea Conference on Ferroelectrics
  • Place of Presentation: Himeji, Hyogo
  • Year and Date: 2010-08-03
• [Presentation] Dielectric Properties and related microstructures in (1-x)BiFeO_3-xBaTiO_3 (2010)
  • Author(s): T. Ozaki, Y. Noguchi, M. Miyayama, S. Mori
  • Organizer: The 8^<th> Japan-Korea Conference on Ferroelectrics
  • Place of Presentation: Himeji, Hyogo
  • Year and Date: 2010-08-03
• [Presentation] Polar Nanodomains and Magnetocapacitance Effect in Hexagonal R(Fe,Ti,V)O_3 (R=Lu,Yb) (2010)
  • Author(s): T. Hoshiyama, S. Mori, K. Yoshii, T. Kambe, N. Ikeda, N. Kimizuka
  • Organizer: The 8^<th> Japan-Korea Conference on Ferroelectrics
  • Place of Presentation: Himeji, Hyogo
  • Year and Date: 2010-08-03
• [Presentation] Domain Structure near the Morpho tropic Phase Boundary of Pb(Mg_1/3Nb_2/3)O_3-PbTiO_3 (2010)
  • Author(s): S. Mori
  • Organizer: The 10th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2010-06-23
• [Presentation] Dielectric Properties and Polar Nanodomains in (1-x)BiFeO_3-xBaTiO_3 (2010)
  • Author(s): T. Ozaki, S. Mori
  • Organizer: The 10th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2010-06-23
• [Presentation] Polar Nanodomain and Magneto capacitance Effect in Hexagonal Yb(Fe,Ti)O_3 (2010)
  • Author(s): T. Hoshiyama, Y. Matsuo, S. Mori, K. Yoshii, Y. Michiue, T. Kambe, N. Iked, F. Brown, N. Kimizuka
  • Organizer: The 10th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2010-06-23
• [Presentation] Polarization state in Pb(Mg_1/3Nb_2/3)O_3 relaxer (2010)
  • Author(s): D. Fu, H. Taniguchi, M. Itoh, S. Koshihara, N. Yamamoto, S. Mori
  • Organizer: The 10th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2010-06-23
• [Presentation] Dielectric properties and nano-scaled domain structures in RFeMO_4 (R=Lu, Y, Yb, M=Cu, Co) (2010)
  • Author(s): S. Mori
  • Organizer: 7th Asian Meeting on Ferroelectricity (AMF-7) and the 7th Asian Meeting on Electroceramics (AMEC-7)
  • Place of Presentation: Jeju, Korea
  • Year and Date: 2010-06-15
• [Remarks] ホームページ等
  • URL: http://mori-lab.mtr.osakafu-u.ac.jp/
• [Patent(Industrial Property Rights)] 電子顕微鏡、および回折像観察方法 (2011)
  • Inventor(s): 戸川欣彦、原田研、森茂生
  • Industrial Property Rights Holder: 大阪府立大学
  • Industrial Property Number: 特願,011-61352
  • Filing Date: 2011-03-18
• [Patent(Industrial Property Rights)] 圧電材料、圧電素子 (2009)
  • Inventor(s): 森茂生、尾崎友厚、松尾祥史、堀部陽一
  • Industrial Property Rights Holder: 大阪府立大学
  • Industrial Property Number: 特願,2008-153068
  • Filing Date: 2009-06-11