Search for itinerant helimagnet showing anomalous magnetotransport properties by high pressure synthesis

2013 Fiscal Year Final Research Report

• Project/Area Number: 23685014
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Inorganic chemistry
• Research Institution: The University of Tokyo
• Principal Investigator: ISHIWATA Shintaro 東京大学, 工学(系)研究科(研究院), 准教授 (00525355)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Keywords: 高圧合成 / らせん磁性 / スカーミオン / トポロジカルホール効果 / 遍歴磁性体 / ペロブスカイト型酸化物 / 異常高原子価 / 国際情報交換

Research Abstract

A cubic perovskite SrFeO3 has been known for long as a rare oxide showing metallic conductivity and helimagnetic ordering, which can be a potential system hosting a topologically new phase such as a skyrmion lattice phase. In this study, we have for the first time succeeded in growing large single crystals of SrFeO3 and the related compounds by combining floating zone method and a high pressure technique. Based on the magnetic, resistivity, and Hall resistivity measurements, we have established the magnetic phase diagram containing a rich variety of novel helimagnetic phases. To study these phases in detail, we have performed polarized neutron diffraction measurements under magnetic field, and revealed that this is the novel multiple-Q helimagnetic system, whose propagation vectors are along the <111> equivalents.

Research Products

• [Journal Article] Insulator-to-Superconductor Transition upon Electron Doping in a BiS_2-Based Superconductor Sr_<1-x>La_xFBiS_2 (2014)
  • Author(s): H. Sakai, D. Kotajima, K. Saito, H. Wadati, Y. Wakisaka, M. Mizumaki, K. Nitta, Y. Tokura, S. Ishiwata
  • Journal Title: J. Phys. Soc. Jpn Volume: 83 Pages: 014709
  • Peer Reviewed
• [Journal Article] Microwave magnetoelectric effect via skyrmion resonance modes in a helimagnetic multiferroic (2013)
  • Author(s): Y. Okamura, F. Kagawa, M. Mochizuki, M. Kubota, S. Seki, S. Ishiwata, M. Kawasaki, Y. Onose and Y. Tokura
  • Journal Title: Nature Commun Volume: 4 Pages: 2391(6)
  • Peer Reviewed
• [Journal Article] Multiple helimagnetic phases and topological Hall effect in epitaxial thin films of pristine and Co-doped SrFeO_3 (2013)
  • Author(s): S. Chakraverty, T. Matsuda, H. Wadati, J. Okamoto, Y. Yamasaki, H. Nakao, Y. Murakami, S. Ishiwata, M. Kawasaki, Y. Taguchi, Y. Tokura, and H. Y. Hwang
  • Journal Title: Phys. Rev. B Volume: 88 Pages: 220405(R)
  • Peer Reviewed
• [Journal Article] Towards control of skyrmion crystals in helimagnetic alloys by spin-orbit coupling (2013)
  • Author(s): K. Shibata, X. Z. Yu, T. Hara, D. Morikawa, N. Kanazawa, K. Kimoto, S. Ishiwata, Y. Matsui and Y. Tokura
  • Journal Title: Nature Nanotech Volume: 8 Pages: 723
  • Peer Reviewed
• [Journal Article] Optimal Tc for the electron-doped cuprate realized under high pressure (2013)
  • Author(s): S. Ishiwata, D. Kotajima, N. Takeshita, C. Terakura, S. Seki, Y. Tokura
  • Journal Title: J. Phys. Soc. Jpn Volume: 82 Pages: 063705
  • Peer Reviewed
• [Journal Article] Superconductivity in Cu_xIrTe_<2 > driven by interlayer hybridization (2013)
  • Author(s): M. Kamitani, M. S. Bahramy, R. Arita, S. Seki, T. Arima, Y. Tokura, and S. Ishiwata
  • Journal Title: Phys. Rev. B Volume: 87 Pages: 180501(R)
  • Peer Reviewed
• [Journal Article] Extremely high electron mobility in a phonon-glass semimetal (2013)
  • Author(s): S. Ishiwata, Y. Shiomi, M. S. Bahramy, J. S. Lee, T. Suzuki, M. Uchida, R. Arita, Y. Taguchi, and Y. Tokura
  • Journal Title: Nature Mater Volume: 12 Pages: 512-517
  • Peer Reviewed
• [Journal Article] Magnetoelectric responses induced by domain rearrangement and spin structural change in triangular-lattice helimagnets NiI_2 and CoI_2 (2013)
  • Author(s): T. Kurumaji, S. Seki, S. Ishiwata, H. Murakawa, Y. Kaneko, and Y. Tokura
  • Journal Title: Phys. Rev. B Volume: 87 Pages: 014429
  • Peer Reviewed
• [Journal Article] Possible skyrmion-lattice ground state in the B20 chiral-lattice magnet MnGe as seen via small-angle neutron scattering (2012)
  • Author(s): N. Kanazawa, J.-H. Kim, D. S. Inosov, J. S. White, N. Egetenmeyer, J. L. Gavilano, S. Ishiwata, Y. Onose, T. Arima, B. Keimer, and Y. Tokura
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 134425
  • Peer Reviewed
• [Journal Article] Variation of Charge Dynamics in the Course of Metal-Insulator Transition for Pyrochlore-type Nd_2Ir_2O_7 (2012)
  • Author(s): K. Ueda, J. Fujioka, Y. Takahashi, T. Suzuki, S. Ishiwata, Y. Taguchi, and Y. Tokura
  • Journal Title: Phys. Rev. Lett Volume: 109 Pages: 136402
  • Peer Reviewed
• [Journal Article] Evolution of magnetic phases in single crystals of SrFe_<1-x>Co_xO_3 solid solution (2012)
  • Author(s): Y. W. Long, Y. Kaneko, S. Ishiwata, Y. Tokunaga, T. Matsuda, H. Wadati, Y. Tanaka, S. Shin, Y. Tokura, and Y. Taguchi
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 064436
  • Peer Reviewed
• [Journal Article] Magnetoelectric nature of skyrmions in a chiral magnetic insulator Cu_2OSeO_3 (2012)
  • Author(s): S. Seki, S. Ishiwata, Y. Tokura
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 060403
  • Peer Reviewed
• [Journal Article] Observation of Magnetic Excitations of Skyrmion Crystal in a Helimagnetic Insulator Cu_2OSeO_3 (2012)
  • Author(s): Y. Onose, Y. Okamura, S. Seki, S. Ishiwata, and Y. Tokura
  • Journal Title: Phys. Rev. Lett Volume: 109 Pages: 037603
  • Peer Reviewed
• [Journal Article] Formation and rotation of skyrmion crystal in the chiral-lattice insulator Cu_2OSeO_3 (2012)
  • Author(s): S. Seki, J.-H. Kim, D. S. Inosov, R. Georgii, S. Ishiwata, B. Keimer, and Y. Tokura
  • Journal Title: Phys. Rev. B Volume: 85 Pages: 220406
  • Peer Reviewed
• [Journal Article] Observation of Skyrmions in a Multiferroic Material (2012)
  • Author(s): S. Seki, X. Z. Yu, S. Ishiwata, and Y. Tokura
  • Journal Title: Science Volume: 336 Pages: 198
  • Peer Reviewed
• [Journal Article] Variation of charge dynamics upon the helimagnetic and metal-insulator transitions for perovskite AFeO3 (A=Sr and Ca) (2012)
  • Author(s): J. Fujioka, S. Ishiwata, Y. Kaneko, Y. Taguchi, and Y. Tokura
  • Journal Title: Phys. Rev. B Volume: 85 Pages: 155141
  • Peer Reviewed
• [Journal Article] Effect of lattice geometry on magnon Hall effect in ferromagnetic insulators (2012)
  • Author(s): T. Ideue, Y. Onose, H. Katsura, Y. Shiomi, S. Ishiwata, N. Nagaosa, and Y. Tokura
  • Journal Title: Phys. Rev. B Volume: 85 Pages: 134411
  • Peer Reviewed
• [Journal Article] Band-filling dependence of thermoelectric properties in B20-type CoGe (2012)
  • Author(s): N. Kanazawa Y. Onose, Y. Shiomi, S. Ishiwata, and Y. Tokura
  • Journal Title: Appl. Phys. Lett Volume: 100 Pages: 093902
  • Peer Reviewed
• [Journal Article] Topological Hall effect in pyrochlore lattice with diluted spin chirality (2012)
  • Author(s): K. Ueda, S. Iguchi, T. Suzuki, S. Ishiwata, Y. Taguchi, and Y. Tokura
  • Journal Title: Phys. Rev. Lett Volume: 108 Pages: 156601
  • Peer Reviewed
• [Journal Article] Emergent phenomena in perovskite-type manganites (2012)
  • Author(s): Y. Taguchi, H. Sakai, D. Okuyama, S. Ishiwata, J. Fujioka, T. Fukuda, D. Hashizume, F. Kagawa, Y. Takahashi, R. Shimano, Y. Tokunaga, Y. Kaneko, A. Nakao, H. Nakao, Y. Murakami, K. Sugimoto, M. Takata, K. Yamauchi, S. Picozzi, A. Q. R. Baron, T. Arima, Y. Tokura
  • Journal Title: Physica B Volume: 407 Pages: 1685-1688
  • Peer Reviewed
• [Journal Article] High-Pressure Hydrothermal Crystal Growth and Multiferroic Properties of a Perovskite YMnO_3 (2011)
  • Author(s): S. Ishiwata, Y. Tokunaga, Y. Taguchi, and Y. Tokura
  • Journal Title: J. Am. Chem. Soc Volume: 133 Pages: 13818
  • Peer Reviewed
• [Journal Article] Mott insulator to metal transition in filling-controlled SmMnAsO1-x (2011)
  • Author(s): Y. Shiomi, S. Ishiwata, Y. Taguchi, and Y. Tokura
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 054519
  • Peer Reviewed
• [Journal Article] Magnetically-Driven Ferroelectric Atomic Displacements in perovskite like YMnO_3 (2011)
  • Author(s): D. Okuyama, S. Ishiwata, Y. Takahashi, K. Yamauchi, S. Picozzi, K. Sugimoto, H. Sakai, M. Takata, R. Shimano, Y. Taguchi, T. Arima, and Y. Tokura
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 054440
  • Peer Reviewed
• [Journal Article] Versatile helimagnetic phases under magnetic fields in cubic perovskite SrFeO_3 (2011)
  • Author(s): S. Ishiwata, M. Tokunaga, Y. Kaneko, D. Okuyama, Y. Tokunaga, S. Wakimoto, K. Kakurai, T. Arima, Y. Taguchi, and Y. Tokura
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 054427
  • Peer Reviewed
• [Journal Article] Synthesis of cubic SrCoO_3 single crystal and its anisotropic magnetic and transport properties (2011)
  • Author(s): Y. Long, Y. Kaneko, S. Ishiwata, Y. Taguchi, Y. Tokura
  • Journal Title: J. Phys. : Condens. Matter Volume: 23 Pages: 245601
  • Peer Reviewed
• [Presentation] BiS_2層状超伝導体Sr_<1-x>La_xFBiS_<2 >における絶縁体―超伝導転移 (2014)
  • Author(s): 酒井英明,古田島大地,齋藤公佑,和達大樹,脇坂祐輝,水牧仁一朗,新田清文,十倉好紀,石渡晋太郎
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学
  • Year and Date: 20140326-29
• [Presentation] Novel multi-Q spiral spin texture in SrFeO_3 (2014)
  • Author(s): S. Ishiwata, J. -H. Kim,D. Inosov,Y. Tokunaga, S. Seki, N. Kanazawa, R. Georgii, K. Seemann, G. Brandl, J. White,E. Nikola, J. Gavilano,Y. W. Long,Y. Kaneko, Y. Taguchi, T. Arima, B. Keimer, Y. Tokura
  • Organizer: APS March Meeting 2014
  • Place of Presentation: デンバー、米国
  • Year and Date: 20140303-07
• [Presentation] Electron-doping-induced insulator-to-superconductor transition in a BiS2-based superconductor Sr_<1-x>La_xFBiS_2 (2014)
  • Author(s): 酒井英明, 古田島大地, 齋藤公介, 和達大樹, 脇坂祐輝, 水牧仁一朗, 新田清文, 十倉好紀, 石渡晋太郎
  • Organizer: APS March Meeting 2014
  • Place of Presentation: デンバー、米国
  • Year and Date: 20140303-07
• [Presentation] Novel helical spin texture in cubic perovskite SrFeO_3 (2013)
  • Author(s): 石渡晋太郎
  • Organizer: FIRST-QS2C WS on "Emergent Phenomena of Correlated Materials"
  • Place of Presentation: 品川
  • Year and Date: 20131113-16
• [Presentation] 中性子散乱を用いたSrFeO3におけるトポロジカルスピンテクスチャーの観測 (2013)
  • Author(s): 石渡晋太郎,J. -H. Kim,D. S. Inosov,徳永祐介,R. Georgii,K. Seemann,J. S. White,N. Egetenmeyer,J. L. Gavilano,関真一郎,金澤直也,Y. -W. Long,金子良夫,田口康二郎,有馬孝尚,B. Keimer,十倉好紀
  • Organizer: 日本物理学会平成25年度秋期大会
  • Place of Presentation: 徳島大学
  • Year and Date: 20130925-28
• [Presentation] Cu_xIrTe_2における超伝導に対する化学圧力効果 (2013)
  • Author(s): 上谷学,寺倉千恵子, 関真一郎, 十倉好紀,石渡晋太郎
  • Organizer: 日本物理学会平成25年度秋期大会
  • Place of Presentation: 徳島大学
  • Year and Date: 20130925-28
• [Presentation] 三角格子キラル磁性体MnSb2O6における電気磁気相関 (2013)
  • Author(s): 木下正貴,関真一郎,南部雄亮,石渡晋太郎,佐藤卓,十倉好紀
  • Organizer: 平成25年度秋期大会
  • Place of Presentation: 徳島大学
  • Year and Date: 20130925-28
• [Presentation] 層状化合物β-MoTe_2の元素置換による熱電特性の制御 (2013)
  • Author(s): 池浦晃至, 酒井英明, M. S. Bahramy, 有田亮太郎, 十倉好紀, 石渡晋太郎
  • Organizer: 平成25年度秋期大会
  • Place of Presentation: 徳島大学
  • Year and Date: 20130925-28
• [Presentation] Topological spin texture in cubic perovskite SrFeO_3 (2013)
  • Author(s): 石渡晋太郎
  • Organizer: Workshop on Oxide Electronics 20
  • Place of Presentation: シンガポール
  • Year and Date: 20130922-25
• [Presentation] キラルな磁性体Cu2OSeO3における磁気光学効果 (2013)
  • Author(s): 力宗真寛,関真一郎,高橋陽太郎,石渡晋太郎,十倉好紀
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島
  • Year and Date: 20130326-29
• [Presentation] 多彩ならせん磁気秩序を示すSrFe0.99Co0.01O3の単結晶中性子散乱 (2012)
  • Author(s): 石渡晋太郎,Jung-Hwa Kim,Dmytro Inosov,Jonathan White,Egetenmeyer Nikola,Gavilano Jorge,Youwen Long,金子良夫,金澤直也,有馬孝尚,田口康二郎,Bernhard Keimer,十倉好紀
  • Organizer: 日本物理学会平成24年度秋期大会
  • Place of Presentation: 横浜
  • Year and Date: 20120918-21
• [Presentation] 超伝導体CuxIrTe2における高圧下物性測定 (2012)
  • Author(s): 上谷学,寺倉千恵子,関真一郎,M. S. Bahramy,有田亮太郎,十倉好紀,石渡晋太郎
  • Organizer: 日本物理学会平成24年度秋期大会
  • Place of Presentation: 横浜
  • Year and Date: 20120918-21
• [Presentation] Transition metal chalcogenides as functional materials (2012)
  • Author(s): Shintaro Ishiwata
  • Organizer: Gordon Research Conference on Solid State Chemistry
  • Place of Presentation: ニューハンプシャー、米国
  • Year and Date: 20120722-27
• [Presentation] 共鳴軟X線回折で見たSrFe_<1-x>Co_xO_3の磁気構造のCo置換量依存性 (2012)
  • Author(s): 松田太一,和達大樹,田中良和,小島太郎,高田恭孝,大浦正樹,仙波泰徳,大橋治彦,辛埴,石渡晋太郎,Y. W. Long,金子良夫,田口康二郎,十倉好紀
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 兵庫
  • Year and Date: 20120324-27
• [Presentation] キラル磁性体Cu2OSeO3における電気磁気応答の異方性 (2012)
  • Author(s): 関真一郎,于秀珍,石渡晋太郎,十倉好紀
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 兵庫
  • Year and Date: 20120324-27
• [Presentation] インターカレーションを用いた層状テルル化物における超伝導発現 (2012)
  • Author(s): 上谷学,関真一郎,十倉好紀,石渡晋太郎
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 兵庫
  • Year and Date: 20120324-27
• [Presentation] 層状縮退半導体CuAgSeの熱電特性及び巨大磁気抵抗効果 (2012)
  • Author(s): 石渡晋太郎,塩見雄毅,J. S. Lee,奥山大輔,M. S. Bahramy,有田亮太郎,鈴木健士,田口康二郎,有馬孝尚,十倉好紀
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 兵庫
  • Year and Date: 20120324-27
• [Presentation] 電子ドープされた無限層銅酸化物超伝導体における圧力効果 (2011)
  • Author(s): 石渡晋太郎,古田島大地,関真一郎,竹下直,寺倉千恵子,十倉好紀
  • Organizer: 第52回高圧討論会
  • Year and Date: 20111109-11
• [Presentation] 無限層構造を有する電子ドープ型銅酸化物超伝導体における圧力効果 (2011)
  • Author(s): 古田島大地,関真一郎,竹下直,寺倉千恵子,石渡晋太郎,十倉好紀
  • Organizer: 日本物理学会平成23年度秋期大会
  • Place of Presentation: 富山市
  • Year and Date: 20110921-24
• [Presentation] 日本物理学会平成23年度秋期大会 (2011)
  • Author(s): 関真一郎,于秀珍,石渡晋太郎,十倉好紀
  • Organizer: 絶縁体における磁気スキルミオンの誘電応答
  • Place of Presentation: 富山市
  • Year and Date: 20110921-24
• [Presentation] Anomalous Hall effect in the helimagnetic cubic perovskite SrFeO_3 (2010)
  • Author(s): S. Ishiwata, Y. Kaneko, M. Tokunaga, D. Okuyama, Y. Tokunaga, T. Arima, S. Wakimoto, K. Kakurai, Y. Taguchi, and Y. Tokura
  • Organizer: 2010 Opening Symposium of QS2C Theory Forum
  • Place of Presentation: 和光市
  • Year and Date: 20100927-30
• [Presentation] らせん磁性体SrFeO_3における異常ホール効果と磁場誘起相転移 (2010)
  • Author(s): S. Ishiwata, Y. Kaneko, M. Tokunaga, Y. Taguchi ,Y. Tokura
  • Organizer: 日本物理学会平成22年度秋期大会
  • Place of Presentation: 大阪
  • Year and Date: 20100923-26
• [Remarks] [1]石渡晋太郎、田口康二郎、十倉好紀「らせん磁性ペロブスカイトの高圧下単結晶作製と磁気輸送特性」高圧物質科学シンポジウム 「高圧下における材料合成」2011年10月14-15日、松山市
• [Remarks] [2] Shintaro Ishiwata "Multiferroicity out of spin helix" 505. WILHELM UND ELSE HERAEUS - SEMINAR " New Routes to Single-Phase Multiferroics" 2012年、4月22-25日、ボン市、ドイツ