Investigation into giant magnetoresistance in molecular conductor by resonant x-ray scattering

• Project/Area Number: 24340084
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Osaka University
• Principal Investigator: Hanasaki Noriaki 大阪大学, 理学(系)研究科(研究院), 教授 (70292761)
• Co-Investigator(Kenkyū-buntansha): NOGAMI Yoshio 岡山大学, 大学院自然科学研究科, 教授 (10202251)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥19,630,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥4,530,000); Fiscal Year 2014: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2013: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2012: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
• Keywords: 強相関電子系 / 巨大磁気抵抗 / 電荷秩序 / 分子性伝導体 / フタロシアニン / 共鳴X線散乱 / ラマン散乱

Outline of Final Research Achievements

In this study, we investigated the mechanism of the giant magnetoresistance observed in the phthalocyanine (Pc) molecular conductor. We found that the x-ray absorption spectra are sensiive to the Pc molecular charge just above the Fe K edge, and tried to detect the charge order of the pi conduction electron by measuring the resonant x-ray scattering. We found that the intramolecular interaction between the pi conduction electron and the d local moment is a ferromagnetic one, which is larger than 500K. This indicates that the magnetic order of the local moments controls the stability of the charge order in the pi conduction electron system. We reduced the density of the local moments by substituting with the Co atom, and observed the giant magnetoresistance in the low spin density. This giant magnetoresistance cannot be explained by the conventional model such as the manganese oxides, indicating the nontrivial electronic state.

Research Products

• [Int'l Joint Research] Friedrich-Schiller-Universität Jena(ドイツ)
• [Journal Article] Effect of Localized Spin Concentration on Giant Magnetoresistance in Molecular Conductor TPP[FexCo{1-x}(Pc)(CN)2]2” (2016)
  • Author(s): M. Ikeda, A. Kanda, H. Murakawa, M. Matsuda, T. Inabe, H. Tajima, N. Hanasaki
  • Journal Title: J. Phys. Soc. Jpn. Volume: 85 Issue: 2 Pages: 024713-024713
  • DOI: 10.7566/jpsj.85.024713
  • NAID: 210000133836
  • ISSN: 0031-9015, 1347-4073
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Observation of all-in type tetrahedral displacements in nonmagnetic pyrochlore niobates (2016)
  • Author(s): S. Torigoe, Y. Ishimoto, Y. Aoishi, H. Murakawa, D. Matsumura, K. Yoshii, Y. Yoneda, Y. Nishihata, K. Kodama, K. Tomiyasu, K. Ikeda, H. Nakao, Y. Nogami, N. Ikeda, T. Otomo, and N. Hanasaki
  • Journal Title: Physical Review B Volume: 93 Pages: 085109-085109
  • DOI: 10.1103/physrevb.93.085109
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Giant ferromagnetic π-d interaction in a phthalocyanine molecule (2015)
  • Author(s): Hiroshi Murakawa, Akinori Kanda, Mitsuo Ikeda, Masaki Matsuda, Noriaki Hanasaki
  • Journal Title: Physical Review B Volume: 92
  • DOI: 10.1103/physrevb.92.054429
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Bistable Multifunctionality and Switchable Strong Ferromagnetic-to-Anti ferromagnetic Coupling in a One-Dimen sional Rhodium(I)-Semiquinonato Complex (2015)
  • Author(s): Mitsumi M., Nishitani T., Yamasaki S., Shimada N., Komatsu Y., Toriumi K., Kitagawa Y., Okumura M., Miyazaki Y., Gorska N., Inaba A., Kanda A., Hanasaki N
  • Journal Title: Journal of the American Chemical Society Volume: 136 Pages: 7026-7037
  • DOI: 10.1021/ja5017014
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] One-dimensional phthalocyanine-based conductor with S=3/2 isotropic magnetic centers (2014)
  • Author(s): Y.Takita, H.Hasegawa, Y.Takahashi, J.Harada, A.Kanda, N.Hanasaki, and Y.Inabe
  • Journal Title: J. Porphyrins Phthalocyanines Volume: 18 Pages: 814-823
  • DOI: 10.1142/s108842461450062x
  • Peer Reviewed
• [Journal Article] Metal-Insulator Transition and Thermoelectric Properties in Hexagonal Barium Titanates (2014)
  • Author(s): S.Tsuchihashi, A.Kanda, H.Murakawa, and N. Hanasaki
  • Journal Title: JPS Conference Proceedings Volume: 3
  • DOI: 10.7566/jpscp.3.017033
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Ligand and Charge Dependence for Absorption Edge in XANES spectra of TPP[Fe(Pc)L2]2 systems (2014)
  • Author(s): K.Takahashi, A.Watanabe, K. Niki, N.Hanasaki, A.Kanda, and T.Fujikawa
  • Journal Title: JPS Conference Proceedings Volume: 1
  • DOI: 10.7566/jpscp.1.012108
  • Peer Reviewed
• [Journal Article] Metamagnetic Transition and Its related Magnetocapacitance Effect in Phthalocyanine-Molecular Conductor Exhibiting Giant Magnetoresistance (2013)
  • Author(s): N.Hanasaki,T.Tateishi,H.Tajima, M.Kimata,M.Tokunaga,M.Matsuda,A.Kanda,H.Murakawa,T.Naito, and T.Inabe
  • Journal Title: J. Phys. Soc. Jpn. Volume: 82 Issue: 9 Pages: 094713-094713
  • DOI: 10.7566/jpsj.82.094713
  • NAID: 210000132760
  • ISSN: 0031-9015, 1347-4073
  • Peer Reviewed
• [Journal Article] Magnetic Torque Experiments on TPP[Fe(Pc)L_2]_2 (L= Br and C1): Antiferromagnetic Short-Range Ordering of d Electrons, Antiferromagnetic o Ordering of π Electrons and Anisotropy Energy (2013)
  • Author(s): K.Torizuka, H.Tajima, M.Inoue, N.Hanasaki, M.Matsuda, D.E.C.Yu, T.Naito, and T.Inabe
  • Journal Title: Journal of the Physical Society of Japan Volume: 82
  • Peer Reviewed
• [Journal Article] Thermoelectric Effect in Hexagonal Tungsten Oxides (2012)
  • Author(s): T.Okusako, T.Tokuyama, Y.Nogami, and N.Hanasaki
  • Journal Title: Journal of the Physical Society of Japan Volume: 81
  • DOI: 10.1143/jpsjs.81sb.sb028
  • Peer Reviewed
• [Journal Article] XANES analysis of Phthalocyanine molecular conductor (2012)
  • Author(s): K.Takahashi, T.Konishi, T.Fujikawa, N.Hanasaki, N.Kawamura, M.Mizumaki, M.Matsuda, D.E.C.Yu, T.Naito, T.Inabe, and H.Tajima
  • Journal Title: e-Journal of Surface Science and Nanotechnology Volume: 10 Pages: 92-96
  • NAID: 130004933718
  • Peer Reviewed
• [Presentation] フタロシアニン分子混晶TPP[Cr_{x}Co_{1-x}(Pc)(CN)_{2}]_{2} (0 < x < 1)の合成と磁気抵抗 (2016)
  • Author(s): 石井龍太, 池田光雄, 村川寛, 西美樹, 松田真生, 稲辺保, 花咲徳亮
  • Organizer: 日本化学会第96春季年会
  • Place of Presentation: 同志社大学
  • Year and Date: 2016-03-25
• [Presentation] 負の磁気抵抗効果を示すフタロシアニン分子導体TPP[Cr(Pc)(CN)_{2}]_{2}の強磁場下物性測定 (2016)
  • Author(s): 池田光雄, 村川寛, 西美樹, 松田真生, 田原大夢, 木田孝則, 萩原政幸, 稲辺保, 花咲徳亮
  • Organizer: 日本物理学会第71回年次大会
  • Place of Presentation: 東北学院大学
  • Year and Date: 2016-03-22
• [Presentation] Effect of Mg substitution in Mg_{1+x}Ti_{2-x}O_{4} (2015)
  • Author(s): K.Inoue, S.Torigoe, H.Murakawa, H.Sakai, and N.Hanasaki
  • Organizer: International Symposium on Present and Future of Material Science
  • Place of Presentation: Osaka University
  • Year and Date: 2015-11-18
  • Int'l Joint Research
• [Presentation] Effect of Carrier Dopping on Thermoelectric Properties in SnSe (2015)
  • Author(s): K.Katayama, S.Tsuchihashi, H.Li, Y.Aoishi, H.Murakawa, H.Sakai, and N.Hanasaki
  • Organizer: International Symposium on Present and Future of Material Science
  • Place of Presentation: Osaka University
  • Year and Date: 2015-11-18
  • Int'l Joint Research
• [Presentation] Compettition of Magnetoresistance in Phthalocyanine Molecular Conductor (2015)
  • Author(s): M.Ikeda, A.Kanda, S.Torigoe, H.Murakawa, M.Matsuda, T.Inabe, H.Tajima, and N.Hanasaki
  • Organizer: International Symposium on Present and Future of Material Science
  • Place of Presentation: Osaka University
  • Year and Date: 2015-11-18
  • Int'l Joint Research
• [Presentation] Nb Tetrahedaral Displacement in Pyrochlore Niobates (2015)
  • Author(s): S.Torigoe, Y.Ishimoto, Y.Aoishi, H.Murakawa, D.Matsumura, K.Yoshii, Y.Yoneda, Y.Nishihata, K.Kodama, K.Tomiyasu, K.Ikeda, H.Nakao, T.Otomo, N.Ikeda, Y.Nogami, and N.Hanasaki
  • Organizer: The 2nd International Symposium of Interactive Material Science Cadet Program
  • Place of Presentation: Senri Hankyu Hotel
  • Year and Date: 2015-11-18
  • Int'l Joint Research
• [Presentation] Humidity-Dependent Surface Conductance in Newly Synthesized Organometal Iodine Cr_{2}Pn_{4}I_{6} (2015)
  • Author(s): M.Komada, H.Murakawa, and N.Hanasaki
  • Organizer: The 2nd International Symposium of Interactive Material Science Cadet Program
  • Place of Presentation: Senri Hankyu Hotel
  • Year and Date: 2015-11-18
  • Int'l Joint Research
• [Presentation] 巨大熱電変換物質SnSeにおける元素置換効果 (2015)
  • Author(s): 片山敬介, 土橋誠悟, 青石優平, 村川寛, 花咲徳亮
  • Organizer: 日本物理学会2015年秋季大会
  • Place of Presentation: 関西大学
  • Year and Date: 2015-09-19
• [Presentation] 新型分子性ヨウ化物における表面伝導特性の研究 (2015)
  • Author(s): 駒田盛是, 村川寛, 花咲徳亮
  • Organizer: 日本物理学会2015年秋季大会
  • Place of Presentation: 関西大学
  • Year and Date: 2015-09-18
• [Presentation] フタロシアニン分子構造を持つ二核錯体[Mn^{(III)}(Pc)(CN)]_{2}Oの合成と物性 (2015)
  • Author(s): 池田光雄, 村川寛, 松田真生, 花咲徳亮
  • Organizer: 第９回分子科学討論会
  • Place of Presentation: 東京工業大学
  • Year and Date: 2015-09-16
• [Presentation] パイロクロア型ニオブ酸化物におけるNb四面体の電荷クラスター状態の探索 (2015)
  • Author(s): 鳥越秀平、青石優平、村川寛、松村大樹、吉井賢資、米田安宏、樹神克明、池田一貴、大友季哉、 中尾裕則、野上由夫、花咲徳亮
  • 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: 2015-03-23
• [Presentation] 軸性フタロシアニンヨウ化物の伝導特性 (2015)
  • Author(s): 村川寛、駒田盛是、花咲徳亮
  • 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: 2015-03-23
• [Presentation] 局在スピン密度の巨大磁気抵抗効果への影響 (2015)
  • Author(s): 池田光雄、神田成慶、村川寛、松田真生、稲辺保、田島裕之、花咲徳亮
  • 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: 2015-03-22
• [Presentation] 高効率熱電材料SnSeのキャリアドーピング効果 (2015)
  • Author(s): 土橋誠悟、青石優平、片山敬介、村川寛、花咲徳亮
  • 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: 2015-03-22
• [Presentation] SnSeの熱電特性の研究と1000K級高温輸送特性測定装置の作製 (2015)
  • Author(s): 青石優平、土橋誠悟、片山敬介、村川寛、花咲徳亮
  • 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: 2015-03-22
• [Presentation] Nb Tetrahedral Displacement in Pyrochlore Niobates (2014)
  • Author(s): S.Torigoe, H.Murakawa, Y.Nogami, H.Nakao, K.Kodama, D.Matsumura, K.Yoshii, and N.Hanasaki
  • Organizer: The 1st International Symposium on Interactive Materials Science Cadet Program
  • Place of Presentation: 阪急ホテルエキスポパーク（大阪府・吹田市）
  • Year and Date: 2014-11-18
• [Presentation] Magnetic and Electric Properties in a Phthalocyanine Molecular Mixed Crystal Exhibiting Giant Magnetoresistance (2014)
  • Author(s): M.Ikeda, A.Kanda, H.Murakawa, M.Matsuda, T.Inabe, H.Tajima, and N.Hanasaki
  • Organizer: The 1st International Symposium on Interactive Materials Science Cadet Program
  • Place of Presentation: 阪急ホテルエキスポパーク（大阪府・吹田市）
  • Year and Date: 2014-11-18
• [Presentation] Crystal Growth and Thermoelectric Properties in SnSe (2014)
  • Author(s): S.Tsuchihashi, Y.Aoishi, K.Katayama, H.Murakawa, and N.Hanasaki
  • Organizer: The 1st International Symposium on Interactive Materials Science Cadet Program
  • Place of Presentation: 阪急ホテルエキスポパーク（大阪府・吹田市）
  • Year and Date: 2014-11-18
• [Presentation] Magnetic-Field-Induced Suppression of Charge Order in Phthalocyanine- Molecular Conductor (2014)
  • Author(s): N. Hanasaki, A. Kanda, M. Ikeda, H.Murakawa, M.Matsuda, Y.Nogami, H. Tajima, and T. Inabe
  • Organizer: 5th International Meeting on Spin in Organic Semiconductors
  • Place of Presentation: イーグレ姫路（兵庫県・姫路市）
  • Year and Date: 2014-10-17
• [Presentation] Ferromagnetic Intramolecular pi-d Interaction in a Phthalocyanine Molecular Conductor (2014)
  • Author(s): M.Ikeda, A.Kanda, H.Murakawa, T.Inabe, H.Tajima, and N.Hanasaki
  • Organizer: 5th International Meeting on Spin in Organic Semiconductors
  • Place of Presentation: イーグレ姫路（兵庫県・姫路市）
  • Year and Date: 2014-10-14
• [Presentation] 巨大磁気抵抗効果を示すフタロシアニン分子混晶TPP[Co1-xFex(Pc)(CN)2]2における磁気特性 (2014)
  • Author(s): 池田光雄、神田成慶、村川寛、松田真生、稲辺保、田島裕之、花咲徳亮
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 中部大学（愛知県・春日井市）
  • Year and Date: 2014-09-10
• [Presentation] 非対称な軸性フタロシアニン分子の誘電特性 (2014)
  • Author(s): 村川寛、花咲徳亮
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 中部大学（愛知県・春日井市）
  • Year and Date: 2014-09-07
• [Presentation] 巨大磁気抵抗効果を誘起するフタロシアニン分子伝導体の分子内相互作用 (2014)
  • Author(s): 神田成慶，池田光雄，村川寛，松田真生，花咲徳亮
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学
• [Presentation] 異種軸配位子を有する鉄フタロシアニン電荷移動錯体 (2014)
  • Author(s): 松田真生，浜田佑美，大石寛子，神田成慶，花咲徳亮
  • Organizer: 日本化学会第94回春季大会
  • Place of Presentation: 名古屋大学
• [Presentation] パイロクロア型ニオブ酸化物におけるニオブ変位の局所秩序 (2013)
  • Author(s): 鳥越秀平、神田成慶、野上由夫、中尾裕則、村川寛、花咲徳亮
  • Organizer: 日本物理学会年会
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-29
• [Presentation] 軸配位鉄フタロシアニン系電荷移動錯体への非対称性導入 (2013)
  • Author(s): 松田真生、浜田佑美、西美樹、神田成慶、花咲徳亮
  • Organizer: 日本化学会
  • Place of Presentation: 立命館大学
  • Year and Date: 2013-03-22
• [Presentation] 軸配位Crフタロシアニン導電体の磁気輸送特性 (2013)
  • Author(s): 滝田悠介、高橋幸裕、長谷川裕之、原田潤、稲辺保、神田成慶、花咲徳亮
  • Organizer: 日本化学会
  • Place of Presentation: 立命館大学
  • Year and Date: 2013-03-22
• [Presentation] Magnetic-Field-Induced Suppression of Charge Order in Phthalocyanine-molecular Conductor Exhibiting Giant Magnetoresistance (2013)
  • Author(s): N.Hanasaki, Y.Nogami, M.Matsuda, H.Tajima, and T.Inabe
  • Organizer: The International Conference on Strongly Correlated Electron Systems 2013
  • Place of Presentation: 東京大学
• [Presentation] Thermoelectric Properties in Hexagonal Barium Titanates (2013)
  • Author(s): S.Tsuchihashi, A.Kanda, and N.Hanasaki
  • Organizer: The International Conference on Strongly Correlated Electron Systems 2013
  • Place of Presentation: 東京大学
• [Presentation] Fe K-edge XANES analysis of Dicyano(phthalocyaninato)iron Compounds with multiple scattering theory (2013)
  • Author(s): K.Takahashi, A.Watanabe, K. Niki, N.Hanasaki, and T.Fujikawa
  • Organizer: The 12th Asia Pacific Physics Conference
  • Place of Presentation: 幕張メッセ
• [Presentation] マグネットプランバイト型Li2NaxK1-xV10O19の軌道揺らぎによる電子比熱係数の増大 (2013)
  • Author(s): 澤井直樹、 徳山達郎、 村川寛、 野上由夫、 中尾裕則、 花咲徳亮
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 徳島大学
• [Presentation] 軸配位Cr-フタロシアニン部分酸化塩のπ-d 相互作用と磁気抵抗効果 (2013)
  • Author(s): 滝田悠介、高橋幸裕、長谷川裕之、原田潤、稲辺保、神田成慶、花咲徳亮
  • Organizer: 第７回分子科学討論会
  • Place of Presentation: 京都テルサ
• [Presentation] Intermolecular Interaction Causing Giant Magnetoresistance in Phthalocyanine-Molecular Conductor (2013)
  • Author(s): 神田成慶、花咲徳亮
  • Organizer: International Research Frontier of Physics, Earth and Space Science
  • Place of Presentation: 大阪大学
• [Presentation] Enhancement of Electronic Specific Heat by Trimer Order Melting in Magnetoplumbite-type Vanadium Oxides Li2NaxK1-xV10O19 (2013)
  • Author(s): 澤井直樹、花咲徳亮
  • Organizer: International Research Frontier of Physics, Earth and Space Science
  • Place of Presentation: 大阪大学
• [Presentation] マグネトプランバイト型バナジウム酸化物Li_2AV_<10.5>O_<19> (A=Na, K)の伝導特性 (2012)
  • Author(s): 徳山達郎、野上由夫、小池正義、花咲徳亮
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2012-09-20
• [Presentation] TbNiC_2のX線磁気散乱 (2012)
  • Author(s): 下村晋、中尾裕則、山本伸樹、野上由夫、花咲徳亮、小坂昌史、小野寺秀也
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2012-09-20
• [Presentation] 非対称な軸配位子をもつた鉄フタロシアニンの構造と物性 (2012)
  • Author(s): 浜田佑美、大石寛子、松田真生、花咲徳亮、野上由夫
  • Organizer: 第6回分子科学討論会
  • Place of Presentation: 東京大学
  • Year and Date: 2012-09-19
• [Presentation] X-ray emission and absorption spectra under high magnetic field in molecular conductor TPP[Fe(Pc)(CN)_2]_2 exhibiting giant magnetoresistance (2012)
  • Author(s): N.Hanasaki
  • Organizer: XAFS15 satellite workshop
  • Place of Presentation: 千葉大学
  • Year and Date: 2012-07-19
• [Remarks] 花咲研究室
  • URL: http://www-gmr.phys.sci.osaka-u.ac.jp/jisseki_h.html
• [Remarks] 研究室HP
  • URL: http://www-gmr.phys.sci.osaka-u.ac.jp/