Charge and spin order in molecular conductor exhibiting giant magnetoresistance

2011 Fiscal Year Final Research Report

• Project/Area Number: 21540361
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Osaka University (2011); Okayama University (2009-2010)
• Principal Investigator: HANASAKI Noriaki 大阪大学, 理学研究科, 教授 (70292761)
• Co-Investigator(Renkei-kenkyūsha): NOGAMI Yoshio 岡山大学, 大学院・自然科学研究科, 教授 (10202251)
• Project Period (FY): 2009 – 2011
• Keywords: 巨大磁気抵抗 / 分子性物質 / 電荷秩序

Research Abstract

In the phthalocyanine molecular conductor, the giant magnetoresistance is observed. In order to clarify the mechanism of this magnetoresistance, we performed the high precision X-ray diffraction measurement under the high magnetic field. We found that the strength of the diffuse streak having the wave number of 4k_F decreases under the applied magnetic field. If this diffuse streak is ascribed to the charge order, the giant magnetoresistance is caused by the magnetic-field-induced suppression of the charge order.

Research Products

• [Journal Article] Magnetic field switching of the charge-density-wave state in the lanthanide intermetallic SmNiC_2 (2012)
  • Author(s): N. Hanasaki, Y. Nogami, M. Kakinuma, S. Shimomura, M. Kosaka, and H. Onodera
  • Journal Title: Physical Review B Volume: vol.85 Pages: 092402-1-5
  • DOI: DOI:10.1103/PhysRevB.85.092402
  • Peer Reviewed
• [Journal Article] Giant magnetoresistance response by the pi-d interaction in an axially ligated phthalocyanine conductor with two-dimensional pi-pi stacking structure (2010)
  • Author(s): M. Ishikawa, T. Asari, M. Matsuda, H. Tajima, N. Hanasaki, T. Naito, and T. Inabe
  • Journal Title: Journal of Materials Chemistry Volume: vol.20 Pages: 4432-4438
  • DOI: DOI:10.1039/c0jm00161a
  • Peer Reviewed
• [Journal Article] Charge order competition leading to nonlinearity in organic thyristor family (2010)
  • Author(s): Y. Nogami, N. Hanasaki, M. Watanabe, K. Yamamoto, T. Ito, N. Ikeda, H. Ohsumi, H. Toy okawa, Y. Noda, I. Terasaki, H. Mori, and T. Mori
  • Journal Title: Journal of the Physical Society of Japan Volume: vol.79 Pages: 044606-1-5
  • DOI: DOI:10.1143/JPSJ.79.044606
  • Peer Reviewed
• [Journal Article] Nonlinear Transport Phenomena in Highly One-dimensional M^<III>(Pc)(CN)_2 Chains with pi-d Interaction(M=Co and Fe and Pc=Phthalocyaninato) (2009)
  • Author(s): M. Ishikawa, S. Yamashita, T. Naito, M. Matsuda, H. Tajima, N. Hanasaki, T. Akutaga wa, T. Nakamura, and T. Inabe
  • Journal Title: Journal of the Physical Society of Japan Volume: vol.78 Pages: 104709-1-6
  • DOI: DOI:10.1143/JPSJ.78.104709
  • Peer Reviewed
• [Journal Article] Magnetic torque and ac and dc magnetic susceptibility measurements on PTMA_<0. 5>[ Fe(Pc)(CN)_2] CH_3CN : Origin of spontaneous magnetization in[ Fe(Pc)(CN)_2] molecular conductors (2009)
  • Author(s): H. Tajima, G. Yoshida, M. Matsuda, J. I. Yamaura, N. Hanasaki, T. Naito, and T. Inabe
  • Journal Title: Physical Review B Volume: vol.80 Pages: 024424-1-8
  • DOI: DOI:10.1103/PhysRevB.80.024424
  • Peer Reviewed
• [Presentation] 巨大磁気抵抗を示すフタロシアニン分子系伝導体における電荷秩序の磁場中融解 (2011)
  • Author(s): 花咲徳亮, 立石拓麻, 野上由夫, 松田真生, 田島裕之, 瀧川仁, 内藤俊雄, 稲辺保
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-22
• [Presentation] Photoemission Spectra in Phethalocyanine-molecular Conductor Exhibiting Giant Magnetoresistance (2010)
  • Author(s): N. Hanasaki
  • Organizer: International Conference on Science and Technology of Synthetic Metals 2010
  • Place of Presentation: 京都国際会議場
  • Year and Date: 2010-07-06
• [Presentation] 希土類化合物RNiC_2の磁気抵抗 (2010)
  • Author(s): 花咲徳亮, 野上由夫, 横田研太郎, 三上和幸, 柿沼光之, 下村晋, 小坂昌史, 小野寺秀也
  • Organizer: 日本物理学会2010年年会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-20
• [Presentation] フタロシアニン分子系伝導体TPP[ Fe(Pc)(CN)_2]_2の強磁場下磁化測定 (2009)
  • Author(s): 立石拓麻, 花咲徳亮, 野上由夫, 徳永将史, 松田真生, 田島裕之, 内藤俊雄, 稲辺保
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-28
• [Presentation] X-ray diffraction in molecular conductor TPP[ Fe(Pc)(CN)_2]_2, The 8th international symposium on crystalline organic metals (2009)
  • Author(s): T. Tateishi, N. Hanasaki, M. Tanabe, Y. Nogami, M. Matsuda, H. Tajima, T. Naito, T. I nabe
  • Organizer: superconductors and ferromagnets
  • Place of Presentation: ニセコ
  • Year and Date: 2009-09-14