Novel physical properties of quasi-two dimensional layered compounds

• Project/Area Number: 26410089
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Functional solid state chemistry
• Research Institution: Kyoto University
• Principal Investigator: MICHIOKA Chishiro 京都大学, 理学研究科, 助教 (70378595)
• Co-Investigator(Renkei-kenkyūsha): YOSHIMURA Kazuyoshi 京都大学, 大学院理学研究科, 助教 (70378595) ; UEDA Hiroaki 京都大学, 大学院理学研究科, 准教授 (10373276) ; KATO Masaki 同志社大学, 理工学部, 教授 (90271006)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 積層化合物 / 三角格子 / 核磁気共鳴 / クラスター化合物 / 遍歴磁性体 / 化合物磁性 / 三角格子反強磁性体 / スピンフラストレーション / 量子臨界点 / クラスター / 強磁性量子臨界点 / クラスター磁性

Outline of Final Research Achievements

In quest of a novel breakthrough of layered compounds, we have prepared new layered compounds and have investigated their physical properties.
For Sr1-xCaxCo2P2 system, their spin dynamics in the vicinity of the ferromagnetic quantum critical point have been clarified by using the NMR technique. As potential compounds to exhibit novel cluster science, we have studied physical properties of La3Re10 which has Re 5.5+ intermediate valence, Li2InMo3O8, Li2ScMo3O8 and Nb3Cl8 in which Mo3O8 or Nb3Cl8 are clusterized in their crystal structures. Then we have discovered an unconventional phase transition in La3Re2O10,the 120-degree magnetic structure in Li2InMo3O8, an spin liquid state in Li2ScMo3O8 and a characteristic charge disproportionation in Nb3Cl8. We have also clarified the physical properties of 1T-CrSe2, where the unstable Cr tetravalence exhibit interesting phenomena. These studies could become a breakthrough of new material science.

Research Products

• [Journal Article] Magnetic-nonmagnetic Phase Transition with Interlayer Charge Disproportionation of Nb3 Trimers in the Cluster Compound Nb3Cl8 (2017)
  • Author(s): Yuya Haraguchi, Chishiro Michioka, Manabu Ishikawa, Yoshiaki Nakano, Hideki Yamochi, Hiroaki Ueda, and Kazuyoshi Yoshimura
  • Journal Title: Inorganic Chemistry Volume: 56 Issue: 6 Pages: 3483-3488
  • DOI: 10.1021/acs.inorgchem.6b03028
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] NMR investigation of spin fluctuations in the itinerant-electron magnetic compound Sr1-xCaxCo2P2 (2017)
  • Author(s): M. Imai, C. Michioka, H. Ueda and K. Yoshimura
  • Journal Title: Phys. Rev. B Volume: 95 Issue: 5
  • DOI: 10.1103/physrevb.95.054417
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Competition between the Direct Exchange Interaction and Superexchange Interaction in Layered Compounds LiCrSe2, LiCrTe2, and NaCrTe2 with a Triangular Lattice (2016)
  • Author(s): S. Kobayashi, H. Ueda, C. Michioka and K. Yoshimura
  • Journal Title: Inorg. Chem. Volume: 55 Issue: 15 Pages: 1407-1413
  • DOI: 10.1021/acs.inorgchem.6b00610
  • Peer Reviewed / Open Access
• [Journal Article] Tetramer spin singlet instability in the fluorine-substituted pyrochlore superconducting system Cd2Re2O7-xFx (2016)
  • Author(s): Yuya Haraguchi, Chishiro Michioka, Hiroaki Ueda, and Kazuyoshi Yoshimura
  • Journal Title: Journal of Physics: Condensed Matter Volume: 28 Issue: 35 Pages: 355602-355602
  • DOI: 10.1088/0953-8984/28/35/355602
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Static and dynamical magnetic properties of the itinerant ferromagnet LaCo2P2 (2015)
  • Author(s): M. Imai, C. Michioka, H. Ueda, and K. Yoshimura
  • Journal Title: Phys. Rev. B Volume: 91 Issue: 18 Pages: 184414-184414
  • DOI: 10.1103/physrevb.91.184414
  • NAID: 120005663289
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Control of the Valence Instability of Tetravalent Chromium in 1T-CrSe2 by Anion Substitution and Pressure (2015)
  • Author(s): S. Kobayashi, H. Ueda, C. Michioka and K. Yoshimura
  • Journal Title: J. Phys. Soc. Jpn. Volume: 84 Issue: 6 Pages: 064708-064708
  • DOI: 10.7566/jpsj.84.064708
  • NAID: 210000133591
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Spin-liquid behavior in the spin-frustrated Mo-3 cluster magnet Li2ScMo3O8 in contrast to magnetic ordering in isomorphic Li2InMo3O8 (2015)
  • Author(s): Y. Haraguchi, C. Michioka, M. Imai, H. Ueda, K. Yoshimura
  • Journal Title: Phys. Rev. B Volume: 92 Issue: 1 Pages: 014409-014409
  • DOI: 10.1103/physrevb.92.014409
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Physical properties of the layered compounds RE3Ru4Al12 (RE = La-Nd) (2014)
  • Author(s): W. Y. Ge, C. Michioka, H. Ohta, K. Yoshimura
  • Journal Title: SOLID STATE COMMUNICATIONS Volume: 195 Pages: 1-5
  • DOI: 10.1016/j.ssc.2014.06.011
  • Peer Reviewed
• [Journal Article] Unconventional multicritical point in the S = 1/2 Re-2-cluster magnet La3Re2O10 (2014)
  • Author(s): Y. Haraguchi, C. Michioka, H. Ueda, K. Yoshimura
  • Journal Title: PHYSICAL REVIEW B Volume: 90 Issue: 6 Pages: 064403-064403
  • DOI: 10.1103/physrevb.90.064403
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Anomalous itinerant-electron metamagnetic transition in the layered Sr1-xCaxCo2P2 system (2014)
  • Author(s): M. Imai, C. Michioka, H. Ohta, A. Matsuo, K. Kindo, H. Ueda, K. Yoshimura
  • Journal Title: PHYSICAL REVIEW B Volume: 90 Issue: 1 Pages: 014407-014407
  • DOI: 10.1103/physrevb.90.014407
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] YbT6Ge6(T=Cr, Mn, Co)系化合物の多彩な相転移 (2017)
  • Author(s): 勝間勇人, 道岡千城, 植田浩明, 松尾晶A, 金道浩一, 辻井直人, 吉村一良
  • Organizer: 日本物理学会 第72回年次大会
  • Place of Presentation: 大阪大学
  • Year and Date: 2017-03-17
• [Presentation] R/T/X(R= 希土類金属; T= Co, Ni, Rh, Pd, Ir, Pt; X= Al, Si, Ga, Ge, In, Sn)三元系化合物の新規物性探索 (2017)
  • Author(s): 山田真二, 道岡千城, 植田浩明, 吉村一良
  • Organizer: 日本物理学会 第72回年次大会
  • Place of Presentation: 大阪大学
  • Year and Date: 2017-03-17
• [Presentation] 層状化合物CrTe2およびその周辺物質の磁性 (2016)
  • Author(s): 水野弘樹, 道岡千城, 小林慎太郎, 植田浩明, 吉村一良
  • Organizer: 日本物理学会
  • Place of Presentation: 東北学院大額
  • Year and Date: 2016-03-19
• [Presentation] 三角格子クラスター磁性体Nb3X8 (X=Cl, Br)の単結晶育成と非磁性化相転移 (2016)
  • Author(s): 原口祐哉, 道岡千城, 植田浩明, 吉村一良
  • Organizer: 日本物理学会
  • Place of Presentation: 東北学院大額
  • Year and Date: 2016-03-19
• [Presentation] 三角格子反強磁性体ACrX2(A=Li, Na, X=Se, Te)の構造と磁性 (2016)
  • Author(s): 小林慎太郎, 植田浩明, 道岡千城, 吉村一良
  • Organizer: 日本物理学会
  • Place of Presentation: 東北学院大額
  • Year and Date: 2016-03-19
• [Presentation] Biフラックス法を用いたYbMn6Ge6単結晶の育成と物性 (2016)
  • Author(s): 勝間勇人, 道岡千城, 植田浩明, 松尾晶, 金道浩一, 辻井直人, 吉村一良
  • Organizer: 日本物理学会
  • Place of Presentation: 東北学院大額
  • Year and Date: 2016-03-19
• [Presentation] Yb1+xIn1-xCu4における二段階の磁気異常と輸送物性 (2015)
  • Author(s): 中東太一, 道岡千城, 植田浩明, 今井正樹, 吉村一良, 松尾 晶, 金道浩一
  • Organizer: 日本物理学会 年次大会
  • Place of Presentation: 早稲田大
  • Year and Date: 2015-03-21 – 2015-03-25
• [Presentation] S = 1=2Re2 クラスター磁性体La3Re2O10 の逐次相転移と 磁気相図 (2015)
  • Author(s): 原口祐哉、道岡千城、植田浩明、吉村一良
  • Organizer: 日本物理学会 年次大会
  • Place of Presentation: 早稲田大
  • Year and Date: 2015-03-21 – 2015-03-25
• [Presentation] 遍歴電子磁性体Sr1-xCaxCo2P2の31P-NMR測定 (2015)
  • Author(s): 今井正樹，道岡千城，植田浩明，吉村一良
  • Organizer: 日本物理学会 年次大会
  • Place of Presentation: 早稲田大
  • Year and Date: 2015-03-21 – 2015-03-25
• [Presentation] クラスター磁性体Li2AMo3O8(A=In,Sc)のNMRを用いた微視的研究 (2014)
  • Author(s): 道岡千城，原口祐哉，植田浩明，吉村一良
  • Organizer: 日本物理学会 秋季大会
  • Place of Presentation: 中部大
  • Year and Date: 2014-09-07 – 2014-09-10
• [Presentation] S=1/2 Mo3クラスター三角格子反強磁性体Li2AMo3O8(A=In,Sc)の磁性 (2014)
  • Author(s): 原口祐哉、道岡千城、植田浩明、吉村一良
  • Organizer: 日本物理学会 秋季大会
  • Place of Presentation: 中部大
  • Year and Date: 2014-09-07 – 2014-09-10