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Phase-separation and phase-control of the ordered state near the critical point by introducing the local inhomogeneity

Research Project

Project/Area Number 24540383
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics II
Research InstitutionSophia University

Principal Investigator

KUWAHARA Hideki  上智大学, 理工学部, 教授 (90306986)

Co-Investigator(Renkei-kenkyūsha) AKAHOSHI Daisuke  東邦大学, 理学部, 准教授 (90407354)
AKAKI Mitsuru  大阪大学, 大学院理学研究科, 助教 (60610904)
Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords不純物置換 / 磁性 / 誘電性 / 結晶 / 酸化物 / 相転移 / マルチフェロイック / 磁場 / 強磁性 / アニール / 酸化還元処理 / 誘電体 / 不純物置換効果 / 反強磁性体 / 遷移金属酸化物 / スピン / 電気磁気効果 / 結晶構造解析 / 相共存 / 軌道整列
Outline of Final Research Achievements

We have investigated the Mn-site substitution effect in Nd0.45Sr0.55MnO3 crystal, which has an A-type layered antiferromagnetic (A-AFM) phase with the 3dx2-y2-type orbital-order. Substitution of Fe or Ga for Mn-site suppresses both the A-AFM order and competing ferromagnetic (FM) correlation, whereas Cr substitution suppresses only the A-AFM order but reactivates the underlying FM correlation via double-exchange mechanism. In Nd0.45Sr0.55Mn0.95Cr0.05O3, the A-AFM state with the orbital-order is changed into the orbital-disordered three-dimensional FM metallic state by applying magnetic field of 12 T, which is much smaller than that of the parent compound.
In addition, We have studied impurity-doping effect in multiferroic CaBa(Co1-xFex)4O7 with 0≦x≦0.25. The magnetization curve shows that the magnetic moment sharply rises at 64K for x = 0 and 54K for x = 0.005, while it does not change for 0.0156≦x. This result indicates that the ferrimagnetic state disappears above 0.0156.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report

Research Products

(49 results)

All 2015 2014 2013 2012 Other

All Journal Article (22 results) (of which Peer Reviewed: 22 results,  Acknowledgement Compliant: 4 results,  Open Access: 1 results) Presentation (24 results) Remarks (3 results)

  • [Journal Article] Magnetic control of transverse electric polarization in BiFeO32015

    • Author(s)
      M. Tokunaga, M. Akaki, T. Ito, S. Miyahara, A. Miyake, H. Kuwahara, and N. Furukawa
    • Journal Title

      Nature Communications

      Volume: 6 Pages: 5878-5878

    • DOI

      10.1038/ncomms6878

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] High field studies on BiFeO3 single crystals grown by the laser-diode heating floating zone method2015

    • Author(s)
      M. Tokunaga, M. Akaki, A. Miyake, T. Ito, and H. Kuwahara
    • Journal Title

      Journal of Magnetism and Magnetic Materials

      Volume: in press. Pages: 259-261

    • DOI

      10.1016/j.jmmm.2014.10.026

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Effects of Mn substitution on the thermoelectric properties of the electron-doped perovskite Sr1-xLaxTiO32014

    • Author(s)
      T. Okuda, H. Hata, T. Eto, K. Nishina, H. Kuwahara, M. Nakamura, and R. Kajimoto
    • Journal Title

      Journal of Physics; Conference Series

      Volume: 588, part 2

    • DOI

      10.1088/1742-6596/568/2/022035

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Interplay between Ferroelectric and Antiferromagnetic Phase Transitions in RbCoBr32014

    • Author(s)
      Y. Nishiwaki, T. Yamaguchi, M. Takashige, H. Kuroe, M. Akaki, H. Kuwahara, T. Kato, and K. Iio
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 83 Issue: 11 Pages: 114708-114708

    • DOI

      10.7566/jpsj.83.114708

    • NAID

      210000133346

    • ISSN
      0031-9015, 1347-4073
    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Successive Magnetic Transitions of Ca2CoSi2O7 in High Magnetic Fields2014

    • Author(s)
      Mitsuru Akaki, Hideki Kuwahara, Akira Matsuo, Koichi Kindo, and Masashi Tokunaga
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 83 Issue: 9 Pages: 093704-093704

    • DOI

      10.7566/jpsj.83.093704

    • ISSN
      0031-9015, 1347-4073
    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Preparation of red-emitting Eu2+-doped barium calcium silicon oxynitride by solid-state reaction and its luminescence properties2014

    • Author(s)
      Hiroya MORISHITA, Anne C. A. DELSING, Hubertus T. HINTZEN, Hideki KUWAHARA1, and Kiyoshi ITATANI
    • Journal Title

      Key Engineering Materials

      Volume: 617 Pages: 149-152

    • DOI

      10.4028/www.scientific.net/kem.617.149

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetoelectric Effects in Mono-domain Crystals of BiFeO32014

    • Author(s)
      Masashi Tokunaga, Mitsuru Akaki, Hideki Kuwahara, Toshimitsu Ito,
    • Journal Title

      JPS Conference Proceedings

      Volume: 3

    • DOI

      10.7566/jpscp.3.014038

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic and Dielectric Properties in Multiferroic Cu3Mo2O9 under High Magnetic Fields2014

    • Author(s)
      Haruhiko KUROE, Kento AOKI, Ryo KINO, Tasuku SATO, Hideki KUWAHARA,
    • Journal Title

      JPS Conf. Proc.

      Volume: 3

    • DOI

      10.7566/jpscp.3.014036

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Anomalous metallic ground state in BaV13O182014

    • Author(s)
      T. Kanzaki, J. Fujioka, Y. Tokura, H. Kuwahara, T. Katsufuji
    • Journal Title

      Phys. Rev. B

      Volume: 89

    • DOI

      10.1103/physrevb.89.140401

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Muon Spin Spectroscopy in Multiferroic (Cu,Zn)3Mo2O92014

    • Author(s)
      黒江晴彦他
    • Journal Title

      JPS conference proceedings

      Volume: 2

    • DOI

      10.7566/jpscp.2.010206

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] A Self-Emissivity-Controlling Radiator for Spacecrafts by Making Use of a Metal-Insulator Transition in Magnetoresistive Manganites2014

    • Author(s)
      K. Tanaka, S. Tachikawa, H. Kuwahara, M. Okawa, T. Saitoh
    • Journal Title

      JPS Conference Proceedings

      Volume: 1

    • DOI

      10.7566/jpscp.1.012005

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Reduction of critical field for magnetic and orbital-ordering phase transition in impurity-substituted Nd0.45Sr0.55MnO3 crystal2014

    • Author(s)
      Y. Izuchi, M. Akaki, D. Akahoshi, H. Kuwahara
    • Journal Title

      APL materials

      Volume: 2(2)

    • DOI

      10.1063/1.4866050

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Thermal, Dielectric, and Magnetic Properties in Multiferroic Cu2.85Zn0.15Mo2O92014

    • Author(s)
      黒江晴彦他
    • Journal Title

      Journal of the Korean Physical Society

      Volume: 63 Pages: 542-545

    • DOI

      10.3938/jkps.63.542

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Fabrication of transparent sintered ZnO-B2O3-Bi2O3 glass body by pressureless firing and hot isostatic pressing2013

    • Author(s)
      Kaori Abe, Jun Hamada, Masamichi Miyazawa, Hideki Kuwahara, Kiyoshi Itatani
    • Journal Title

      IOP Conference Series: Materials Science and Engineering

      Volume: 47

    • DOI

      10.1088/1757-899x/47/1/012024

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Control of coexisting ferroelectric phases in RMnO3 crystals with fine tuning of 4f moment2013

    • Author(s)
      T.Tadokoro, N.Kano, H.Kuroe, T.Sekine, H.Kuwahara, M.Akaki
    • Journal Title

      Journal of the Korean Physical Society

      Volume: 63(3) Pages: 504-507

    • DOI

      10.3938/jkps.63.504

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Low-temperature thermoelectric properties of the electron-doped perovskites Sr1-xCaxTi1-yNbyO32013

    • Author(s)
      T.Okuda, J.Fukuyado, K.Narikiyo, M.Akaki, H.Kuwahara
    • Journal Title

      Journal of the Korean Physical Society

      Volume: 63(3) Pages: 428-432

    • DOI

      10.3938/jkps.63.428

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Anisotropic Magnetic Properties in Åkermanite Sr_2MSi_2O_7 (M=Co, Mn) crystals2013

    • Author(s)
      M. Akaki, T. Tadokoro, H. Kuwahara, T. Kihara, and M. Tokunaga
    • Journal Title

      Journal of the Korean Physical Society

      Volume: 62 Pages: 1812-1814

    • DOI

      10.3938/jkps.62.1812

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] High Magnetic Field Dependence of Magnetodielectric Properties in Sr_2CoSiz_2O_7 crystals2013

    • Author(s)
      M. Akaki, T. Tadokoro, T. Kihara, M. Tokunaga, and H. Kuwahara
    • Journal Title

      Journal of Low Temperature Physics

      Volume: 170 Pages: 291-295

    • DOI

      10.1007/s10909-012-0796-z

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] Thermoelectric properties of the electron-doped perovskites Sr1−xCaxTi1−yNbyO32012

    • Author(s)
      J. Fukuyado, K. Narikiyo, M. Akaki, H. Kuwahara, T. Okuda
    • Journal Title

      Physical Review B

      Volume: 85 Pages: 75112-75112

    • DOI

      10.1103/physrevb.85.075112

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] Multiferroic properties of an °akermanite Sr_2CoSi_2O_7 single crystal in high magnetic fields2012

    • Author(s)
      M. Akaki, H. Iwamoto, T. Kihara, M. Tokunaga, and H. Kuwahara
    • Journal Title

      Physical Review B

      Volume: 86

    • DOI

      10.1103/physrevb.86.060413

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] Magnetoelectric property in 3d transition metal oxide with tetrahedral structure2012

    • Author(s)
      H. Iwamoto, M. Ehara, M. Akaki, and H. Kuwahara
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 400 Pages: 32031-32031

    • DOI

      10.1088/1742-6596/400/3/032031

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] Anisotropic magneto-transport properties of layered perovskite Sr3Fe2-xCoxO7-δ crystals2012

    • Author(s)
      R. Nakamura, J. Tozawa, M. Akaki, D. Akahoshi, K. Itatani, and H. Kuwahara
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 400 Pages: 32060-32060

    • DOI

      10.1088/1742-6596/400/3/032060

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Presentation] 一次元磁性体BaCo2Si2O7の強磁場磁化過程2015

    • Author(s)
      赤木暢,奥谷顕,吉澤大智,桑原英樹,萩原政幸
    • Organizer
      日本物理学会第70回年次大会
    • Place of Presentation
      早稲田大学(東京都新宿区)
    • Year and Date
      2015-03-21 – 2015-03-25
    • Related Report
      2014 Annual Research Report
  • [Presentation] Cu(II)-CO3系量子スピンラダー磁性体の1H-NMR2015

    • Author(s)
      小堀祥平,後藤貴行,桑原英樹,張笑,中野佑紀,西原禎文,井上克也
    • Organizer
      日本物理学会第70回年次大会
    • Place of Presentation
      早稲田大学(東京都新宿区)
    • Year and Date
      2015-03-21 – 2015-03-25
    • Related Report
      2014 Annual Research Report
  • [Presentation] Ba2Ti13O22の電子相転移とバナジウムドーピング2015

    • Author(s)
      小西孝彦,桑原英樹,仁科康佑,勝藤拓郎
    • Organizer
      日本物理学会第70回年次大会
    • Place of Presentation
      早稲田大学(東京都新宿区)
    • Year and Date
      2015-03-21 – 2015-03-25
    • Related Report
      2014 Annual Research Report
  • [Presentation] ペロブスカイト型BaSnO3へのスピン・キャリアドーピング2015

    • Author(s)
      東出唯志,芝野杏奈,勝藤拓郎,桑原英樹,梶原凌
    • Organizer
      日本物理学会第70回年次大会
    • Place of Presentation
      早稲田大学(東京都新宿区)
    • Year and Date
      2015-03-21 – 2015-03-25
    • Related Report
      2014 Annual Research Report
  • [Presentation] ABaM4O7(A=(Ca,Y), M=(Co,Fe))単結晶における電気磁気特性2015

    • Author(s)
      梶原凌,仁科康佑,小田涼佑,赤木暢,桑原英樹
    • Organizer
      日本物理学会第70回年次大会
    • Place of Presentation
      早稲田大学(東京都新宿区)
    • Year and Date
      2015-03-21
    • Related Report
      2014 Annual Research Report
  • [Presentation] 熱制御用マンガン酸化物結晶のバンド・フィリング制御2015

    • Author(s)
      村上良明、太刀川純孝、齋藤智彦、桑原英樹
    • Organizer
      第62回応用物理学会春季学術講演会
    • Place of Presentation
      東海大学湘南キャンパス(神奈川県平塚市)
    • Year and Date
      2015-03-11 – 2015-03-14
    • Related Report
      2014 Annual Research Report
  • [Presentation] 一次元磁性体BaCo2Si2O7の強磁場物性2014

    • Author(s)
      赤木暢, 奥谷顕, 吉澤大智, 桑原英樹, 萩原政幸
    • Organizer
      強磁場科学研究会「強磁場が切り拓く物質科学のフロンティア」
    • Place of Presentation
      大阪大学豊中キャンパス(大阪府豊中市)
    • Year and Date
      2014-12-04 – 2014-12-05
    • Related Report
      2014 Annual Research Report
  • [Presentation] 室温マルチフェロイクック物質BiFeO3の電気磁気効果2014

    • Author(s)
      徳永将史,赤木暢,河智史朗、三宅厚志,伊藤利充,桑原英樹
    • Organizer
      強磁場科学研究会「強磁場が切り拓く物質科学のフロンティア」
    • Place of Presentation
      大阪大学豊中キャンパス(大阪府豊中市)
    • Year and Date
      2014-12-04 – 2014-12-05
    • Related Report
      2014 Annual Research Report
  • [Presentation] LD-FZ法で作製したBiFeO3単結晶の強磁場電気磁気効果2014

    • Author(s)
      徳永将史,赤木暢,三宅厚志,桑原英樹,伊藤利充,宮原慎,古川信夫
    • Organizer
      日本物理学会2014年秋季大会
    • Place of Presentation
      中部大学(愛知県春日井市)
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] Cu(II)-CO3系スピンラダー構造を持つ磁性体の1H-NMR2014

    • Author(s)
      小堀祥平,後藤貴行,桑原英樹,張笑,中野佑紀,西原貞文,井上克也
    • Organizer
      日本物理学会2014年秋季大会
    • Place of Presentation
      中部大学(愛知県春日井市)
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] 軌道/電荷整列系Ba1-xSrxV13O18単結晶の物性2014

    • Author(s)
      掛巣佑,神崎達也,小西孝彦,桑原英樹,勝藤拓郎
    • Organizer
      日本物理学会2014年秋季大会
    • Place of Presentation
      中部大学(愛知県春日井市)
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] CaBaCo4O7単結晶における電気磁気特性の不純物置換効果2014

    • Author(s)
      仁科康佑,梶原凌,村上良明,加野直明,赤木暢,桑原英樹
    • Organizer
      日本物理学会2014年秋季大会
    • Place of Presentation
      中部大学(愛知県春日井市)
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] HIGH FIELD STUDIES ON BiFeO3 SINGLE CRYSTALS GROWN BY THE LASER-DIODE HEATING FLOATING ZONE METHOD2014

    • Author(s)
      M. Tokunaga, M. Akaki, A. Miyake, T. Ito, and H. Kuwahara
    • Organizer
      Moscow International Symposium on Magnetism MISM-2014
    • Place of Presentation
      Moscow, Russia
    • Year and Date
      2014-06-29 – 2014-07-03
    • Related Report
      2014 Annual Research Report
  • [Presentation] Ca2CoSi2O7結晶の強磁場磁化過程と電気磁気特性2014

    • Author(s)
      赤木暢,小濱芳允,桑原英樹,松尾晶,金道浩一,徳永将史
    • Organizer
      日本物理学会 第69回年次大会
    • Place of Presentation
      東海大学 湘南キャンパス
    • Related Report
      2013 Research-status Report
  • [Presentation] Cu(II)-CO3系スピンラダー構造を持つ磁性体の1H-NMR2014

    • Author(s)
      小堀祥平,後藤貴行,桑原英樹,張笑,中野佑紀,西原禎文,井上克也
    • Organizer
      日本物理学会 第69回年次大会
    • Place of Presentation
      東海大学 湘南キャンパス
    • Related Report
      2013 Research-status Report
  • [Presentation] BaV13O18の異常金属相と光学スペクトル2014

    • Author(s)
      神崎達也,小西孝彦,桑原英樹,藤岡淳,十倉好紀,勝藤拓郎
    • Organizer
      日本物理学会 第69回年次大会
    • Place of Presentation
      東海大学 湘南キャンパス
    • Related Report
      2013 Research-status Report
  • [Presentation] (Cu,Zn)3(Mo,W)2O9の誘電的性質2013

    • Author(s)
      木野亮,佐藤輔,青木謙人,黒江晴彦,関根智幸,桑原英樹,長谷正司,岡邦彦,伊藤利充,永崎洋
    • Organizer
      日本物理学会 2013年秋季大会
    • Place of Presentation
      徳島大学常 三島キャンパス
    • Related Report
      2013 Research-status Report
  • [Presentation] CaBaCo4O7単結晶における電気磁気応答の異方性測定II2013

    • Author(s)
      加野直明,赤木暢,桑原英樹
    • Organizer
      日本物理学会 2013年秋季大会
    • Place of Presentation
      徳島大学常 三島キャンパス
    • Related Report
      2013 Research-status Report
  • [Presentation] Mn酸化物を用いた宇宙機用放射率可変素子(SRD)の開発(2)2013

    • Author(s)
      田中洸輔,太刀川純孝,桑原英樹,大川万里生,齋藤智彦
    • Organizer
      日本物理学会 2013年秋季大会
    • Place of Presentation
      徳島大学常 三島キャンパス
    • Related Report
      2013 Research-status Report
  • [Presentation] Ca2CoSi2O7結晶における2次の電気磁気効果2013

    • Author(s)
      赤木暢,徳永将史,桑原英樹
    • Organizer
      日本物理学会 第68回年次大会
    • Place of Presentation
      広島大学東広島キャンパス
    • Related Report
      2012 Research-status Report
  • [Presentation] Fe2Mo3O8のFeサイト置換による磁気特性変化2012

    • Author(s)
      渡邊拓郎,赤木暢,赤星大介,桑原英樹
    • Organizer
      日本物理学会 2012年秋季大会
    • Place of Presentation
      横浜国立大学常盤台キャンパス
    • Related Report
      2012 Research-status Report
  • [Presentation] Mn酸化物を用いた宇宙機用放射率可変素子(SRD)の開発2012

    • Author(s)
      田中洸輔,太刀川純孝,桑原英樹,大川万里生,齋藤智彦
    • Organizer
      日本物理学会 2012年秋季大会
    • Place of Presentation
      横浜国立大学常盤台キャンパス
    • Related Report
      2012 Research-status Report
  • [Presentation] Mn酸化物を用いた宇宙機用放射率可変素子(SRD)の開発

    • Author(s)
      田中洸輔,太刀川純孝,桑原英樹,大川万里生,齋藤智彦
    • Organizer
      第60回応用物理学会春季学術講演会
    • Place of Presentation
      神奈川工科大学
    • Related Report
      2012 Research-status Report
  • [Presentation] Improving the Smart Radiation Device with pevskite Mn oxides

    • Author(s)
      K.Tanaka, S.Tachikawa, H.Kuwahara, and T.Saitoh
    • Organizer
      Hayama Aerospace Workshop 2013
    • Place of Presentation
      UBE Industries Hayama Facility
    • Related Report
      2012 Research-status Report
  • [Remarks] 上智大学 物質科学研究室(桑原研)ホームページ

    • URL

      http://www.ph.sophia.ac.jp/~kuwa-ken/

    • Related Report
      2014 Annual Research Report
  • [Remarks] 上智大学 物質科学研究室(桑原研)ホームページ

    • URL

      http://www.ph.sophia.ac.jp/~kuwa-ken/

    • Related Report
      2013 Research-status Report
  • [Remarks] 物質科学研究室(桑原研)ホームページ

    • URL

      http://www.ph.sophia.ac.jp/~kuwa-ken/

    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2020-05-15  

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