Novel quantum spin systems formed by verdazyl radical

2013 Fiscal Year Final Research Report

• Project/Area Number: 24740241
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Osaka Prefecture University
• Principal Investigator: YAMAGUCHI Hironori 大阪府立大学, 理学(系)研究科(研究院), 助教 (70581023)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Keywords: 量子スピン系 / スピンラダー / 有機ラジカル

Research Abstract

A variety of new quantum systems were successfully synthesized by using verdazyl radical. Ab initio molecular orbital calculations and quantitative analyses of their magnetic properties revealed magnetic models formed by intermolecular magnetic interactions. In three types of spin ladders with ferromagnetic leg interactions, 3-Cl-4-F-V, 3-Br-4-F-V, and 3-I-V, unconventional magnetic phases were observed, which possibly originates from the interplay of low dimensionality and frustration. Nontrivial magnetic phase located near the magnetic saturation field in 3-I-V especially suggests development of multipolar spin correlation. In beta-2,6-Cl_2-V forming an S=1/2 Heisenberg antiferromagnetic chain with fourfold periodicity, alternating and unique Ising ferromagnetic chains were found to be effective in the specific field regions from the perturbation treatment of the spin Hamiltonian.

Research Products

• [Journal Article] Fine-Tuning of Magnetic Interactions in Organic Spin Ladders (2014)
  • Author(s): H. Yamaguchi, H. Miyagai, T. Shimokawa, K. Iwase, T. Ono, Y. Kono, N. Kase, K. Araki, S. Kittaka, T. Sakakibara, T. Kawakami, K. Okunishi, and Y. Hosokoshi
  • Journal Title: J. Phys. Soc. Jpn. Volume: 83 Pages: 033707
  • Peer Reviewed
• [Journal Article] Quasi-one-dimensional S=1/2 Heisenberg antiferromagnetic chain consisting of the organic radical p-Br-V (2013)
  • Author(s): K. Iwase, H. Yamaguchi, T. Ono, Y. Hosokoshi, T. Shimokawa, Y. Kono, S. Kittaka, T. Sakakibara, A. Matsuo, and K. Kindo
  • Journal Title: Phys. Rev. B Volume: 88 Pages: 184431
  • Peer Reviewed
• [Journal Article] Various regimes of quantum behavior in S=1/2 Heisenberg antiferromagnetic chain with fourfold periodicity (2013)
  • Author(s): H. Yamaguchi, T. Okubo, K. Iwase, T. Ono, Y. Kono, S. Kittaka, T. Sakakibara, A. Matsuo, K. Kindo, and Y. Hosokoshi
  • Journal Title: Phys. Rev. B Volume: 88 Pages: 174410
  • Peer Reviewed
• [Journal Article] Crystal structure and magnetic properties of a verdazyl biradical m-Ph-V_2 forming a ferromagnetic alternating double-chain (2013)
  • Author(s): K. Iwase, H. Yamaguchi, T. Ono, T. Shimokawa, H. Nakano, A. Matsuo, K. Kindo, H. Nojiri, and Y. Hosokoshi
  • Journal Title: J. Phys. Soc. Jpn. Volume: 82 Pages: 074719
  • Peer Reviewed
• [Journal Article] Unconventional Magnetic and Thermodynamic Properties of S=1/2 Spin Ladder with Ferromagnetic Legs (2013)
  • Author(s): H. Yamaguchi, K. Iwase, T. Ono, T. Shimokawa, H. Nakano, Y. Shimura, N. Kase, S. Kittaka, T. Sakakibara, T. Kawakami, and Y. Hosokoshi
  • Journal Title: Phys. Rev. Lett. Volume: 110 Pages: 157205
  • Peer Reviewed
• [Journal Article] Crystal structure and magnetic properties of honeycomb-like lattice antiferromagnet p-BIP-V_2 (2013)
  • Author(s): H. Yamaguchi, S. Nagata, M. Tada, K. Iwase, T. Ono, S. Nishihara, Y. Hosokoshi, T. Shimokawa, H. Nakano, H. Nojiri, A. Matsuo, K. Kindo, and T. Kawakami
  • Journal Title: Phys. Rev. B Volume: 87 Pages: 125120
  • Peer Reviewed
• [Presentation] 強磁性鎖から成るスピンラダー3-I-Vの低温物性 (2014)
  • Author(s): 山口博則,宮外浩嗣,小野俊雄,河野洋平,橘高俊一郎,榊原敏郎,下川統久朗,細越裕子
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学
  • Year and Date: 2014-03-28
• [Presentation] 強磁性相互作用を含む梯子格子磁性体における新奇量子相 (2014)
  • Author(s): 宮外浩嗣,山口博則,小野俊雄,下川統久朗,吉田誠,瀧川仁,河野洋平,橘高俊一郎,榊原俊郎,奥西巧一,大久保毅,川上貴資,細越裕子
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学
  • Year and Date: 2014-03-27
• [Presentation] 新規一次元鎖有機反強磁性体α-2-Cl-4-F-Vの極低温磁化測定 (2014)
  • Author(s): 河野洋平,榊原俊郎,山口博則,濱田領平,細越裕子
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学
  • Year and Date: 2014-03-27
• [Presentation] 4倍周期磁気構造を持つ新規一次元磁性体の低温物性 (2013)
  • Author(s): 山口博則,小野俊雄,木田孝則,萩原政幸,大久保毅,松尾晶,金道浩一,荒木幸治,橘高俊一郎,榊原俊郎,細越裕子
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学
  • Year and Date: 2013-09-28
• [Presentation] 強磁性相互作用を含む新規梯子格子磁性体の低温物性 (2013)
  • Author(s): 宮外浩嗣,山口博則,岩瀬賢治,小野俊雄,下川統久朗,細越裕子
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学
  • Year and Date: 2013-09-25
• [Presentation] 強磁性鎖から成る新規梯子格子磁性体の低温物性 (2013)
  • Author(s): 山口博則,宮外浩嗣,小野敏雄,下川統久朗,川上貴資,志村恭通,加瀬直樹,荒木幸治,橘高俊一郎,榊原俊郎,細越裕子
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-26
• [Remarks]
  • URL: http://www.p.s.osakafu-u.ac.jp/~yhoso/topic/b26Cl2V.html